diff --git a/proto/side/btcbridge/bitcoin.proto b/proto/side/btcbridge/bitcoin.proto
index c3e53761..1c376b85 100644
--- a/proto/side/btcbridge/bitcoin.proto
+++ b/proto/side/btcbridge/bitcoin.proto
@@ -101,5 +101,9 @@ message DKGCompletionRequest {
   // sender
   string sender = 2;
   // new vaults generated by DKG
-  repeated Vault vaults = 3;
+  repeated string vaults = 3;
+  // validator address
+  string validator = 4;
+  // hex encoded validator signature
+  string signature = 5;
 }
diff --git a/proto/side/btcbridge/tx.proto b/proto/side/btcbridge/tx.proto
index 8035c519..766c5751 100644
--- a/proto/side/btcbridge/tx.proto
+++ b/proto/side/btcbridge/tx.proto
@@ -112,12 +112,16 @@ message MsgInitiateDKGResponse {}
 
 // MsgCompleteDKG is the Msg/CompleteDKG request type.
 message MsgCompleteDKG {
-  // the sender is expected to be the validator which participates in DKG
+  // the sender
   string sender = 1;
-  // request id
+  // DKG request id
   uint64 id = 2;
   // new vaults generated by DKG
-  repeated Vault vaults = 3;
+  repeated string vaults = 3;
+  // validator address
+  string validator = 4;
+  // hex encoded validator signature
+  string signature = 5;
 }
 
 // MsgCompleteDKGResponse defines the Msg/CompleteDKG response type.
diff --git a/x/btcbridge/abci.go b/x/btcbridge/abci.go
index df891334..bdb98f6d 100644
--- a/x/btcbridge/abci.go
+++ b/x/btcbridge/abci.go
@@ -25,14 +25,15 @@ func EndBlocker(ctx sdk.Context, k keeper.Keeper) {
 		}
 
 		// check if the DKG completion requests are valid
-		if !types.CheckCompletionRequests(completionRequests) {
+		if !types.CheckDKGCompletionRequests(completionRequests) {
 			req.Status = types.DKGRequestStatus_DKG_REQUEST_STATUS_FAILED
 			continue
 		}
 
-		req.Status = types.DKGRequestStatus_DKG_REQUEST_STATUS_COMPLETED
-
 		// update vaults
 		k.UpdateVaults(ctx, completionRequests[0].Vaults)
+
+		// update status
+		req.Status = types.DKGRequestStatus_DKG_REQUEST_STATUS_COMPLETED
 	}
 }
diff --git a/x/btcbridge/keeper/keeper_tss.go b/x/btcbridge/keeper/keeper_tss.go
index b020ce14..6c74d410 100644
--- a/x/btcbridge/keeper/keeper_tss.go
+++ b/x/btcbridge/keeper/keeper_tss.go
@@ -120,14 +120,14 @@ func (k Keeper) SetDKGCompletionRequest(ctx sdk.Context, req *types.DKGCompletio
 	store := ctx.KVStore(k.storeKey)
 
 	bz := k.cdc.MustMarshal(req)
-	store.Set(types.DKGCompletionRequestKey(req.Id, req.Sender), bz)
+	store.Set(types.DKGCompletionRequestKey(req.Id, req.Validator), bz)
 }
 
 // HasDKGCompletionRequest returns true if the given completion request exists, false otherwise
-func (k Keeper) HasDKGCompletionRequest(ctx sdk.Context, id uint64, sender string) bool {
+func (k Keeper) HasDKGCompletionRequest(ctx sdk.Context, id uint64, validator string) bool {
 	store := ctx.KVStore(k.storeKey)
 
-	return store.Has(types.DKGCompletionRequestKey(id, sender))
+	return store.Has(types.DKGCompletionRequestKey(id, validator))
 }
 
 // GetDKGCompletionRequests gets DKG completion requests by the given id
@@ -175,18 +175,31 @@ func (k Keeper) CompleteDKG(ctx sdk.Context, req *types.DKGCompletionRequest) er
 		return types.ErrInvalidDKGCompletionRequest
 	}
 
-	if k.HasDKGCompletionRequest(ctx, req.Id, req.Sender) {
+	if k.HasDKGCompletionRequest(ctx, req.Id, req.Validator) {
 		return types.ErrDKGCompletionRequestExists
 	}
 
-	if !types.ParticipantExists(dkgReq.Participants, req.Sender) {
+	validatorConsAddr, _ := sdk.ConsAddressFromHex(req.Validator)
+	validator, found := k.stakingKeeper.GetValidatorByConsAddr(ctx, validatorConsAddr)
+	if !found {
+		return types.ErrInvalidDKGCompletionRequest
+	}
+
+	if !types.ParticipantExists(dkgReq.Participants, validator.OperatorAddress) {
 		return types.ErrUnauthorizedDKGCompletionRequest
 	}
 
-	for _, v := range req.Vaults {
-		if types.SelectVaultByPubKey(k.GetParams(ctx).Vaults, v.PubKey) != nil {
-			return types.ErrInvalidDKGCompletionRequest
-		}
+	if err := k.CheckVaults(ctx, req.Vaults); err != nil {
+		return err
+	}
+
+	pubKey, err := validator.ConsPubKey()
+	if err != nil {
+		return err
+	}
+
+	if !types.VerifySignature(req.Signature, pubKey.Bytes(), req) {
+		return types.ErrInvalidDKGCompletionRequest
 	}
 
 	k.SetDKGCompletionRequest(ctx, req)
@@ -194,22 +207,36 @@ func (k Keeper) CompleteDKG(ctx sdk.Context, req *types.DKGCompletionRequest) er
 	return nil
 }
 
-// UpdateVaults updates the asset vaults of the btc bridge
-func (k Keeper) UpdateVaults(ctx sdk.Context, newVaults []*types.Vault) {
-	params := k.GetParams(ctx)
+// CheckVaults checks if the provided vaults are valid
+func (k Keeper) CheckVaults(ctx sdk.Context, vaults []string) error {
+	currentVaults := k.GetParams(ctx).Vaults
 
-	for _, v := range newVaults {
-		address, err := types.GetVaultAddressFromPubKey(v.PubKey)
-		if err != nil {
-			panic(err)
+	if len(vaults) != len(currentVaults) {
+		return types.ErrInvalidDKGCompletionRequest
+	}
+
+	for _, v := range vaults {
+		if types.SelectVaultByBitcoinAddress(currentVaults, v) != nil {
+			return types.ErrInvalidDKGCompletionRequest
 		}
+	}
 
-		v.Address = address
+	return nil
+}
 
-		// TODO
-		v.Version = 1
+// UpdateVaults updates the asset vaults of the btc bridge
+func (k Keeper) UpdateVaults(ctx sdk.Context, newVaults []string) {
+	params := k.GetParams(ctx)
+
+	for i, v := range newVaults {
+		newVault := &types.Vault{
+			Address:   v,
+			AssetType: params.Vaults[i].AssetType,
+			// TODO
+			Version: 1,
+		}
 
-		params.Vaults = append(params.Vaults, v)
+		params.Vaults = append(params.Vaults, newVault)
 	}
 
 	k.SetParams(ctx, params)
diff --git a/x/btcbridge/types/bitcoin.go b/x/btcbridge/types/bitcoin.go
index 5296b983..ca96f7e3 100644
--- a/x/btcbridge/types/bitcoin.go
+++ b/x/btcbridge/types/bitcoin.go
@@ -1,13 +1,10 @@
 package types
 
 import (
-	"github.com/btcsuite/btcd/btcec/v2/schnorr"
 	"github.com/btcsuite/btcd/btcutil"
-	"github.com/btcsuite/btcd/chaincfg"
 	"github.com/btcsuite/btcd/mempool"
 	"github.com/btcsuite/btcd/txscript"
 	"github.com/btcsuite/btcd/wire"
-	"github.com/decred/dcrd/dcrec/secp256k1/v4"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
@@ -23,11 +20,6 @@ const (
 	DefaultSigHashType = txscript.SigHashAll
 )
 
-// GetTaprootAddress gets the taproot address from the given public key
-func GetTaprootAddress(pubKey *secp256k1.PublicKey, chainCfg *chaincfg.Params) (*btcutil.AddressTaproot, error) {
-	return btcutil.NewAddressTaproot(schnorr.SerializePubKey(txscript.ComputeTaprootKeyNoScript(pubKey)), chainCfg)
-}
-
 // IsDustOut returns true if the given output is dust, false otherwise
 func IsDustOut(out *wire.TxOut) bool {
 	return !IsOpReturnOutput(out) && mempool.IsDust(out, MinRelayFee)
diff --git a/x/btcbridge/types/bitcoin.pb.go b/x/btcbridge/types/bitcoin.pb.go
index dd0691e2..3793cc27 100644
--- a/x/btcbridge/types/bitcoin.pb.go
+++ b/x/btcbridge/types/bitcoin.pb.go
@@ -547,7 +547,11 @@ type DKGCompletionRequest struct {
 	// sender
 	Sender string `protobuf:"bytes,2,opt,name=sender,proto3" json:"sender,omitempty"`
 	// new vaults generated by DKG
-	Vaults []*Vault `protobuf:"bytes,3,rep,name=vaults,proto3" json:"vaults,omitempty"`
+	Vaults []string `protobuf:"bytes,3,rep,name=vaults,proto3" json:"vaults,omitempty"`
+	// validator address
+	Validator string `protobuf:"bytes,4,opt,name=validator,proto3" json:"validator,omitempty"`
+	// hex encoded validator signature
+	Signature string `protobuf:"bytes,5,opt,name=signature,proto3" json:"signature,omitempty"`
 }
 
 func (m *DKGCompletionRequest) Reset()         { *m = DKGCompletionRequest{} }
@@ -597,13 +601,27 @@ func (m *DKGCompletionRequest) GetSender() string {
 	return ""
 }
 
-func (m *DKGCompletionRequest) GetVaults() []*Vault {
+func (m *DKGCompletionRequest) GetVaults() []string {
 	if m != nil {
 		return m.Vaults
 	}
 	return nil
 }
 
+func (m *DKGCompletionRequest) GetValidator() string {
+	if m != nil {
+		return m.Validator
+	}
+	return ""
+}
+
+func (m *DKGCompletionRequest) GetSignature() string {
+	if m != nil {
+		return m.Signature
+	}
+	return ""
+}
+
 func init() {
 	proto.RegisterEnum("side.btcbridge.WithdrawStatus", WithdrawStatus_name, WithdrawStatus_value)
 	proto.RegisterEnum("side.btcbridge.DKGRequestStatus", DKGRequestStatus_name, DKGRequestStatus_value)
@@ -619,61 +637,62 @@ func init() {
 func init() { proto.RegisterFile("side/btcbridge/bitcoin.proto", fileDescriptor_b004a69efe3c7d84) }
 
 var fileDescriptor_b004a69efe3c7d84 = []byte{
-	// 856 bytes of a gzipped FileDescriptorProto
+	// 875 bytes of a gzipped FileDescriptorProto
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+	0x34, 0x28, 0x77, 0x66, 0x6c, 0x7c, 0x7f, 0x41, 0xb0, 0x4f, 0x22, 0xa4, 0xc3, 0x8b, 0x05, 0x89,
+	0x38, 0x65, 0x81, 0xae, 0x35, 0xb5, 0xd3, 0x82, 0x9b, 0x41, 0x84, 0xa0, 0x30, 0xc5, 0x7c, 0xaa,
+	0xe7, 0x9a, 0xda, 0x69, 0xc9, 0x55, 0x31, 0xaa, 0x41, 0x71, 0x4a, 0xe8, 0x64, 0x2a, 0xf4, 0xbc,
+	0x22, 0xa7, 0x08, 0x99, 0xf0, 0x45, 0x18, 0x91, 0x05, 0x65, 0x31, 0x1f, 0x79, 0xf2, 0xeb, 0x23,
+	0xd5, 0x5a, 0x50, 0xad, 0x9f, 0x67, 0xa5, 0xe4, 0x5c, 0xf9, 0x9d, 0x06, 0x94, 0xe7, 0x24, 0xba,
+	0x9f, 0x91, 0x51, 0xc4, 0x98, 0xd0, 0xf7, 0x15, 0x0f, 0x92, 0x94, 0xcb, 0x98, 0x40, 0x87, 0xb0,
+	0x1f, 0xb0, 0x60, 0x4c, 0xf4, 0xa2, 0x3a, 0x27, 0x01, 0x52, 0x92, 0x47, 0x05, 0xd7, 0x5f, 0x24,
+	0x92, 0x64, 0x2c, 0x73, 0xd2, 0x3b, 0xfd, 0x40, 0x11, 0x55, 0x8c, 0xaa, 0x90, 0x0f, 0xc4, 0x52,
+	0x2f, 0xa9, 0x94, 0x0c, 0x5b, 0x7f, 0x68, 0x50, 0xeb, 0x24, 0x23, 0xbc, 0xa3, 0x62, 0xea, 0x47,
+	0xf8, 0x17, 0x97, 0xfc, 0x1c, 0x13, 0x2e, 0xa4, 0x03, 0xd8, 0xf7, 0x23, 0xc2, 0xb9, 0x72, 0xa0,
+	0xe4, 0x66, 0x10, 0x7d, 0x07, 0x45, 0x3c, 0x67, 0x71, 0x20, 0x94, 0x07, 0xe5, 0xb3, 0x23, 0x33,
+	0xf5, 0x59, 0x0e, 0xc5, 0x4c, 0x87, 0x62, 0x76, 0x19, 0x0d, 0x3a, 0x85, 0x87, 0x8f, 0x8d, 0x3d,
+	0x37, 0xa5, 0xa3, 0x3a, 0x1c, 0x70, 0xf9, 0x75, 0x79, 0x81, 0xc4, 0xa8, 0x15, 0x56, 0x7a, 0x97,
+	0xd4, 0x4f, 0xbd, 0x51, 0x31, 0xfa, 0x16, 0x8a, 0x5c, 0x60, 0x11, 0x73, 0xe5, 0x44, 0xe5, 0xcc,
+	0x30, 0x37, 0xf7, 0xcb, 0xcc, 0x34, 0x0f, 0x14, 0xcb, 0x4d, 0xd9, 0x2d, 0x13, 0x8a, 0x6e, 0x1c,
+	0x90, 0xbe, 0x2f, 0xfd, 0x52, 0xbe, 0xa7, 0x43, 0x4c, 0x00, 0xaa, 0x40, 0x4e, 0x2c, 0x95, 0xf8,
+	0x97, 0x6e, 0x4e, 0x2c, 0x5b, 0x23, 0xd8, 0x77, 0x7c, 0x3a, 0x16, 0xe8, 0x6b, 0xc8, 0x51, 0x5f,
+	0x71, 0xcb, 0x67, 0xb5, 0xed, 0xc3, 0x92, 0x4f, 0xba, 0x39, 0xea, 0xcb, 0x79, 0x3f, 0x73, 0xa0,
+	0xb4, 0xba, 0x60, 0x0d, 0x8a, 0x2c, 0x16, 0x61, 0x9c, 0xec, 0xc1, 0x4b, 0x37, 0x45, 0x2d, 0x1b,
+	0x2a, 0xf6, 0x65, 0xef, 0x06, 0x47, 0x82, 0x8e, 0x69, 0x88, 0x03, 0xe5, 0xee, 0x9c, 0x05, 0xf4,
+	0x9e, 0x44, 0x99, 0xbb, 0x29, 0x7c, 0xee, 0x7b, 0x6e, 0xc3, 0xf7, 0xd6, 0xbf, 0x1a, 0x80, 0x7d,
+	0xd9, 0xcb, 0x06, 0x54, 0x59, 0x89, 0x2d, 0x28, 0x51, 0x1d, 0xf8, 0x2c, 0x5c, 0x9f, 0x20, 0xbb,
+	0xf3, 0xa7, 0xe5, 0x4f, 0x3d, 0xdb, 0x14, 0xe2, 0x6e, 0xf4, 0xa0, 0x13, 0x28, 0x89, 0x69, 0x44,
+	0xf8, 0x94, 0xcd, 0xfc, 0xf4, 0x0e, 0xeb, 0x04, 0xb2, 0x01, 0xc8, 0x32, 0xa4, 0x11, 0x16, 0xf2,
+	0x5d, 0x14, 0x94, 0x4d, 0x75, 0x33, 0x79, 0xb2, 0x66, 0xf6, 0x64, 0xcd, 0x61, 0xf6, 0x64, 0x3b,
+	0x07, 0x0f, 0x1f, 0x1b, 0xda, 0xfb, 0xbf, 0x1a, 0x9a, 0xfb, 0xac, 0x0f, 0x7d, 0xbf, 0x35, 0xd5,
+	0xe6, 0x0e, 0x85, 0xe9, 0x1d, 0xb7, 0xe6, 0xfa, 0x9b, 0x06, 0x87, 0xf6, 0x65, 0xaf, 0xcb, 0xe6,
+	0xe1, 0x8c, 0xc8, 0x6f, 0xfd, 0x9f, 0x15, 0x35, 0x28, 0x72, 0x12, 0xf8, 0x24, 0xca, 0xe6, 0x93,
+	0x20, 0x99, 0x5f, 0xe0, 0x78, 0x26, 0xb8, 0x9e, 0x6f, 0xe6, 0x65, 0x3e, 0x41, 0xf2, 0xda, 0x0b,
+	0x3c, 0xa3, 0x3e, 0x16, 0x2c, 0x4a, 0x37, 0x70, 0x9d, 0x90, 0x55, 0x4e, 0x27, 0x01, 0x16, 0x71,
+	0x44, 0xd2, 0x37, 0xb9, 0x4e, 0xbc, 0xfa, 0x55, 0x83, 0xca, 0xe6, 0x1e, 0xa2, 0x06, 0x1c, 0xdf,
+	0xf5, 0x87, 0x17, 0xb6, 0xdb, 0xbe, 0x1b, 0x0d, 0x86, 0xed, 0xe1, 0xed, 0x60, 0x74, 0x7b, 0x35,
+	0xb8, 0x71, 0xba, 0xfd, 0xf3, 0xbe, 0x63, 0x57, 0xf7, 0xd0, 0x31, 0x7c, 0xb9, 0x4d, 0xe8, 0xba,
+	0x4e, 0x7b, 0xe8, 0xd8, 0x55, 0x6d, 0x57, 0x77, 0xc7, 0xbd, 0x6e, 0xdb, 0xdd, 0xf6, 0x40, 0x12,
+	0x72, 0xe8, 0x2b, 0x38, 0xfa, 0xa4, 0xfb, 0xfa, 0xea, 0xbc, 0xef, 0xbe, 0x75, 0xec, 0x6a, 0xfe,
+	0xd5, 0xef, 0x1a, 0x54, 0xb7, 0x2d, 0x44, 0x2d, 0x30, 0xec, 0xcb, 0xde, 0xc8, 0x75, 0x7e, 0xb8,
+	0x75, 0x06, 0xc3, 0xdd, 0xaa, 0x0c, 0xa8, 0xef, 0xe0, 0xdc, 0x38, 0x57, 0x76, 0xff, 0xaa, 0x57,
+	0xd5, 0x50, 0x13, 0x4e, 0x76, 0xd4, 0xbb, 0xd7, 0x6f, 0x6f, 0xde, 0x38, 0x2b, 0x65, 0x3b, 0x18,
+	0xe7, 0xed, 0xfe, 0x1b, 0xa9, 0xac, 0x73, 0xf1, 0xf0, 0x68, 0x68, 0x1f, 0x1e, 0x0d, 0xed, 0xef,
+	0x47, 0x43, 0x7b, 0xff, 0x64, 0xec, 0x7d, 0x78, 0x32, 0xf6, 0xfe, 0x7c, 0x32, 0xf6, 0x7e, 0x34,
+	0x27, 0x54, 0x4c, 0x63, 0xcf, 0x1c, 0xb3, 0xb9, 0x25, 0xb7, 0x41, 0x2d, 0xd3, 0x98, 0xcd, 0x14,
+	0xb0, 0x96, 0xcf, 0xfe, 0xda, 0xe2, 0x5d, 0x48, 0xb8, 0x57, 0x54, 0x84, 0x6f, 0xfe, 0x0b, 0x00,
+	0x00, 0xff, 0xff, 0x21, 0x06, 0x83, 0xb9, 0x8f, 0x06, 0x00, 0x00,
 }
 
 func (m *BlockHeader) Marshal() (dAtA []byte, err error) {
@@ -1008,16 +1027,25 @@ func (m *DKGCompletionRequest) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.Signature) > 0 {
+		i -= len(m.Signature)
+		copy(dAtA[i:], m.Signature)
+		i = encodeVarintBitcoin(dAtA, i, uint64(len(m.Signature)))
+		i--
+		dAtA[i] = 0x2a
+	}
+	if len(m.Validator) > 0 {
+		i -= len(m.Validator)
+		copy(dAtA[i:], m.Validator)
+		i = encodeVarintBitcoin(dAtA, i, uint64(len(m.Validator)))
+		i--
+		dAtA[i] = 0x22
+	}
 	if len(m.Vaults) > 0 {
 		for iNdEx := len(m.Vaults) - 1; iNdEx >= 0; iNdEx-- {
-			{
-				size, err := m.Vaults[iNdEx].MarshalToSizedBuffer(dAtA[:i])
-				if err != nil {
-					return 0, err
-				}
-				i -= size
-				i = encodeVarintBitcoin(dAtA, i, uint64(size))
-			}
+			i -= len(m.Vaults[iNdEx])
+			copy(dAtA[i:], m.Vaults[iNdEx])
+			i = encodeVarintBitcoin(dAtA, i, uint64(len(m.Vaults[iNdEx])))
 			i--
 			dAtA[i] = 0x1a
 		}
@@ -1207,11 +1235,19 @@ func (m *DKGCompletionRequest) Size() (n int) {
 		n += 1 + l + sovBitcoin(uint64(l))
 	}
 	if len(m.Vaults) > 0 {
-		for _, e := range m.Vaults {
-			l = e.Size()
+		for _, s := range m.Vaults {
+			l = len(s)
 			n += 1 + l + sovBitcoin(uint64(l))
 		}
 	}
+	l = len(m.Validator)
+	if l > 0 {
+		n += 1 + l + sovBitcoin(uint64(l))
+	}
+	l = len(m.Signature)
+	if l > 0 {
+		n += 1 + l + sovBitcoin(uint64(l))
+	}
 	return n
 }
 
@@ -2279,7 +2315,7 @@ func (m *DKGCompletionRequest) Unmarshal(dAtA []byte) error {
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Vaults", wireType)
 			}
-			var msglen int
+			var stringLen uint64
 			for shift := uint(0); ; shift += 7 {
 				if shift >= 64 {
 					return ErrIntOverflowBitcoin
@@ -2289,25 +2325,87 @@ func (m *DKGCompletionRequest) Unmarshal(dAtA []byte) error {
 				}
 				b := dAtA[iNdEx]
 				iNdEx++
-				msglen |= int(b&0x7F) << shift
+				stringLen |= uint64(b&0x7F) << shift
 				if b < 0x80 {
 					break
 				}
 			}
-			if msglen < 0 {
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
 				return ErrInvalidLengthBitcoin
 			}
-			postIndex := iNdEx + msglen
+			postIndex := iNdEx + intStringLen
 			if postIndex < 0 {
 				return ErrInvalidLengthBitcoin
 			}
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Vaults = append(m.Vaults, &Vault{})
-			if err := m.Vaults[len(m.Vaults)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
+			m.Vaults = append(m.Vaults, string(dAtA[iNdEx:postIndex]))
+			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Validator", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowBitcoin
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthBitcoin
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthBitcoin
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Validator = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Signature", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowBitcoin
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthBitcoin
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthBitcoin
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
 			}
+			m.Signature = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
diff --git a/x/btcbridge/types/keys.go b/x/btcbridge/types/keys.go
index d629aec1..5779610a 100644
--- a/x/btcbridge/types/keys.go
+++ b/x/btcbridge/types/keys.go
@@ -70,6 +70,6 @@ func DKGRequestKey(id uint64) []byte {
 	return append(DKGRequestKeyPrefix, Int64ToBytes(id)...)
 }
 
-func DKGCompletionRequestKey(id uint64, sender string) []byte {
-	return append(append(DKGCompletionRequestKeyPrefix, Int64ToBytes(id)...), []byte(sender)...)
+func DKGCompletionRequestKey(id uint64, validator string) []byte {
+	return append(append(DKGCompletionRequestKeyPrefix, Int64ToBytes(id)...), []byte(validator)...)
 }
diff --git a/x/btcbridge/types/message_complete_dkg.go b/x/btcbridge/types/message_complete_dkg.go
index d38a0925..d5f6c4b1 100644
--- a/x/btcbridge/types/message_complete_dkg.go
+++ b/x/btcbridge/types/message_complete_dkg.go
@@ -1,6 +1,9 @@
 package types
 
 import (
+	"encoding/hex"
+
+	"github.com/cosmos/cosmos-sdk/crypto/keys/ed25519"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
 )
@@ -30,12 +33,25 @@ func (m *MsgCompleteDKG) GetSigners() []sdk.AccAddress {
 
 // ValidateBasic performs basic MsgCompleteDKG message validation.
 func (m *MsgCompleteDKG) ValidateBasic() error {
-	if _, err := sdk.ConsAddressFromBech32(m.Sender); err != nil {
+	if _, err := sdk.AccAddressFromBech32(m.Sender); err != nil {
 		return sdkerrors.Wrap(err, "invalid sender address")
 	}
 
-	if len(m.Vaults) != 2 {
-		return ErrInvalidDKGParams
+	if len(m.Vaults) == 0 {
+		return ErrInvalidDKGCompletionRequest
+	}
+
+	if _, err := sdk.ConsAddressFromHex(m.Validator); err != nil {
+		return ErrInvalidDKGCompletionRequest
+	}
+
+	sigBytes, err := hex.DecodeString(m.Signature)
+	if err != nil {
+		return ErrInvalidDKGCompletionRequest
+	}
+
+	if len(sigBytes) != ed25519.SignatureSize {
+		return ErrInvalidDKGCompletionRequest
 	}
 
 	return nil
diff --git a/x/btcbridge/types/tss.go b/x/btcbridge/types/tss.go
index d75d31f0..b83823a9 100644
--- a/x/btcbridge/types/tss.go
+++ b/x/btcbridge/types/tss.go
@@ -1,12 +1,11 @@
 package types
 
 import (
+	"crypto/ed25519"
 	"encoding/hex"
 	"reflect"
 
-	"github.com/btcsuite/btcd/btcec/v2/schnorr"
-
-	sdk "github.com/cosmos/cosmos-sdk/types"
+	"github.com/cometbft/cometbft/crypto"
 )
 
 // ParticipantExists returns true if the given address is a participant, false otherwise
@@ -20,8 +19,8 @@ func ParticipantExists(participants []*DKGParticipant, addr string) bool {
 	return false
 }
 
-// CheckCompletionRequests checks if the vaults of all the completion requests are same
-func CheckCompletionRequests(requests []*DKGCompletionRequest) bool {
+// CheckDKGCompletionRequests checks if the vaults of all the DKG completion requests are same
+func CheckDKGCompletionRequests(requests []*DKGCompletionRequest) bool {
 	if len(requests) == 0 {
 		return false
 	}
@@ -37,23 +36,25 @@ func CheckCompletionRequests(requests []*DKGCompletionRequest) bool {
 	return true
 }
 
-// GetVaultAddressFromPubKey gets the vault address from the given public key
-// Note: the method generates taproot address
-func GetVaultAddressFromPubKey(pubKey string) (string, error) {
-	pubKeyBytes, err := hex.DecodeString(pubKey)
+// VerifySignature verifies the given signature against the given DKG completion request
+func VerifySignature(signature string, pubKey []byte, req *DKGCompletionRequest) bool {
+	sig, err := hex.DecodeString(signature)
 	if err != nil {
-		return "", err
+		return false
 	}
 
-	parsedPubKey, err := schnorr.ParsePubKey(pubKeyBytes)
-	if err != nil {
-		return "", err
-	}
+	sigMsg := GetSigMsgFromDKGCompletionReq(req)
 
-	address, err := GetTaprootAddress(parsedPubKey, sdk.GetConfig().GetBtcChainCfg())
-	if err != nil {
-		return "", err
+	return ed25519.Verify(pubKey, sigMsg, sig)
+}
+
+// GetSigMsgFromDKGCompletionReq gets the msg to be signed from the given DKG completion request
+func GetSigMsgFromDKGCompletionReq(req *DKGCompletionRequest) []byte {
+	rawMsg := Int64ToBytes(req.Id)
+
+	for _, v := range req.Vaults {
+		rawMsg = append(rawMsg, []byte(v)...)
 	}
 
-	return address.String(), nil
+	return crypto.Sha256(rawMsg)
 }
diff --git a/x/btcbridge/types/tx.pb.go b/x/btcbridge/types/tx.pb.go
index 2f96cea7..937f7091 100644
--- a/x/btcbridge/types/tx.pb.go
+++ b/x/btcbridge/types/tx.pb.go
@@ -653,12 +653,16 @@ var xxx_messageInfo_MsgInitiateDKGResponse proto.InternalMessageInfo
 
 // MsgCompleteDKG is the Msg/CompleteDKG request type.
 type MsgCompleteDKG struct {
-	// the sender is expected to be the validator which participates in DKG
+	// the sender
 	Sender string `protobuf:"bytes,1,opt,name=sender,proto3" json:"sender,omitempty"`
-	// request id
+	// DKG request id
 	Id uint64 `protobuf:"varint,2,opt,name=id,proto3" json:"id,omitempty"`
 	// new vaults generated by DKG
-	Vaults []*Vault `protobuf:"bytes,3,rep,name=vaults,proto3" json:"vaults,omitempty"`
+	Vaults []string `protobuf:"bytes,3,rep,name=vaults,proto3" json:"vaults,omitempty"`
+	// validator address
+	Validator string `protobuf:"bytes,4,opt,name=validator,proto3" json:"validator,omitempty"`
+	// hex encoded validator signature
+	Signature string `protobuf:"bytes,5,opt,name=signature,proto3" json:"signature,omitempty"`
 }
 
 func (m *MsgCompleteDKG) Reset()         { *m = MsgCompleteDKG{} }
@@ -708,13 +712,27 @@ func (m *MsgCompleteDKG) GetId() uint64 {
 	return 0
 }
 
-func (m *MsgCompleteDKG) GetVaults() []*Vault {
+func (m *MsgCompleteDKG) GetVaults() []string {
 	if m != nil {
 		return m.Vaults
 	}
 	return nil
 }
 
+func (m *MsgCompleteDKG) GetValidator() string {
+	if m != nil {
+		return m.Validator
+	}
+	return ""
+}
+
+func (m *MsgCompleteDKG) GetSignature() string {
+	if m != nil {
+		return m.Signature
+	}
+	return ""
+}
+
 // MsgCompleteDKGResponse defines the Msg/CompleteDKG response type.
 type MsgCompleteDKGResponse struct {
 }
@@ -872,56 +890,58 @@ func init() {
 func init() { proto.RegisterFile("side/btcbridge/tx.proto", fileDescriptor_785ca8e1e4227068) }
 
 var fileDescriptor_785ca8e1e4227068 = []byte{
-	// 780 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xcc, 0x56, 0xcb, 0x4e, 0xf3, 0x46,
-	0x18, 0x8d, 0x93, 0x90, 0x92, 0x2f, 0x90, 0xaa, 0x56, 0x08, 0xc6, 0x50, 0x27, 0x75, 0xb9, 0x44,
-	0x2a, 0x24, 0x52, 0x40, 0x5d, 0x57, 0x29, 0x2a, 0x54, 0x28, 0x12, 0x32, 0xd0, 0x56, 0xdd, 0x20,
-	0x5f, 0xa6, 0xf6, 0xb4, 0x89, 0xc7, 0x78, 0x26, 0x34, 0x48, 0x95, 0xfa, 0x0a, 0x6c, 0xfb, 0x06,
-	0xed, 0x9b, 0xb0, 0x44, 0xea, 0xa6, 0xab, 0xaa, 0x82, 0x17, 0xa9, 0x7c, 0xc9, 0xc4, 0x49, 0x6c,
-	0x2e, 0xbb, 0x7f, 0xe7, 0x99, 0x73, 0xe6, 0x9c, 0x33, 0x9f, 0xf3, 0x7d, 0x31, 0xac, 0x53, 0x6c,
-	0xa1, 0x8e, 0xc1, 0x4c, 0xc3, 0xc7, 0x96, 0x8d, 0x3a, 0x6c, 0xdc, 0xf6, 0x7c, 0xc2, 0x88, 0x58,
-	0x0d, 0x80, 0x36, 0x07, 0xe4, 0x9a, 0x4d, 0x6c, 0x12, 0x42, 0x9d, 0xe0, 0x29, 0x62, 0xc9, 0x9b,
-	0x73, 0xc7, 0x3d, 0xdd, 0xd7, 0x87, 0x34, 0x06, 0xb7, 0xe6, 0x40, 0x03, 0x33, 0x93, 0x60, 0x37,
-	0x42, 0xd5, 0x3f, 0x04, 0x58, 0xef, 0x53, 0xfb, 0x62, 0x64, 0x0c, 0x31, 0xfb, 0x1e, 0x33, 0xc7,
-	0xf2, 0xf5, 0x5f, 0x2f, 0x98, 0xce, 0x46, 0x54, 0xac, 0x43, 0x89, 0x22, 0xd7, 0x42, 0xbe, 0x24,
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+	// 803 bytes of a gzipped FileDescriptorProto
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+	0x09, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1733,16 +1753,25 @@ func (m *MsgCompleteDKG) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.Signature) > 0 {
+		i -= len(m.Signature)
+		copy(dAtA[i:], m.Signature)
+		i = encodeVarintTx(dAtA, i, uint64(len(m.Signature)))
+		i--
+		dAtA[i] = 0x2a
+	}
+	if len(m.Validator) > 0 {
+		i -= len(m.Validator)
+		copy(dAtA[i:], m.Validator)
+		i = encodeVarintTx(dAtA, i, uint64(len(m.Validator)))
+		i--
+		dAtA[i] = 0x22
+	}
 	if len(m.Vaults) > 0 {
 		for iNdEx := len(m.Vaults) - 1; iNdEx >= 0; iNdEx-- {
-			{
-				size, err := m.Vaults[iNdEx].MarshalToSizedBuffer(dAtA[:i])
-				if err != nil {
-					return 0, err
-				}
-				i -= size
-				i = encodeVarintTx(dAtA, i, uint64(size))
-			}
+			i -= len(m.Vaults[iNdEx])
+			copy(dAtA[i:], m.Vaults[iNdEx])
+			i = encodeVarintTx(dAtA, i, uint64(len(m.Vaults[iNdEx])))
 			i--
 			dAtA[i] = 0x1a
 		}
@@ -2070,11 +2099,19 @@ func (m *MsgCompleteDKG) Size() (n int) {
 		n += 1 + sovTx(uint64(m.Id))
 	}
 	if len(m.Vaults) > 0 {
-		for _, e := range m.Vaults {
-			l = e.Size()
+		for _, s := range m.Vaults {
+			l = len(s)
 			n += 1 + l + sovTx(uint64(l))
 		}
 	}
+	l = len(m.Validator)
+	if l > 0 {
+		n += 1 + l + sovTx(uint64(l))
+	}
+	l = len(m.Signature)
+	if l > 0 {
+		n += 1 + l + sovTx(uint64(l))
+	}
 	return n
 }
 
@@ -3438,7 +3475,7 @@ func (m *MsgCompleteDKG) Unmarshal(dAtA []byte) error {
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field Vaults", wireType)
 			}
-			var msglen int
+			var stringLen uint64
 			for shift := uint(0); ; shift += 7 {
 				if shift >= 64 {
 					return ErrIntOverflowTx
@@ -3448,25 +3485,87 @@ func (m *MsgCompleteDKG) Unmarshal(dAtA []byte) error {
 				}
 				b := dAtA[iNdEx]
 				iNdEx++
-				msglen |= int(b&0x7F) << shift
+				stringLen |= uint64(b&0x7F) << shift
 				if b < 0x80 {
 					break
 				}
 			}
-			if msglen < 0 {
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
 				return ErrInvalidLengthTx
 			}
-			postIndex := iNdEx + msglen
+			postIndex := iNdEx + intStringLen
 			if postIndex < 0 {
 				return ErrInvalidLengthTx
 			}
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.Vaults = append(m.Vaults, &Vault{})
-			if err := m.Vaults[len(m.Vaults)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
+			m.Vaults = append(m.Vaults, string(dAtA[iNdEx:postIndex]))
+			iNdEx = postIndex
+		case 4:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Validator", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTx
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthTx
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTx
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Validator = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Signature", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTx
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthTx
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTx
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
 			}
+			m.Signature = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
 		default:
 			iNdEx = preIndex