diff --git a/cwt/cwt_test.go b/cwt/cwt_test.go
index 0ead697..cfa6341 100644
--- a/cwt/cwt_test.go
+++ b/cwt/cwt_test.go
@@ -35,7 +35,7 @@ func createTestProof() (string, error) {
 	data := map[int]interface{}{
 		1:  "test-client",
 		3:  "http://127.0.0.1:60413",
-		6:  "1706706927",
+		6:  1706706927,
 		10: "kYcbCxvele1pn94YpKjD",
 	}
 
diff --git a/verifiable/cose.go b/verifiable/cose.go
index e621f18..4577c94 100644
--- a/verifiable/cose.go
+++ b/verifiable/cose.go
@@ -23,10 +23,10 @@ func marshalCOSE(
 	signatureAlg cose.Algorithm,
 	signer cwt.ProofCreator,
 	keyID string,
-) ([]byte, error) {
+) ([]byte, *cose.Sign1Message, error) {
 	payload, err := cbor.Marshal(claims)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
 	msg := &cose.Sign1Message{
@@ -44,7 +44,7 @@ func marshalCOSE(
 
 	signData, err := cwt2.GetProofValue(msg)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
 	signed, err := signer.SignCWT(cwt.SignParameters{
@@ -52,15 +52,15 @@ func marshalCOSE(
 		CWTAlg: signatureAlg,
 	}, signData)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
 	msg.Signature = signed
 
 	final, err := cbor.Marshal(msg)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
-	return final, nil
+	return final, msg, nil
 }
diff --git a/verifiable/credential.go b/verifiable/credential.go
index d780f50..839e86a 100644
--- a/verifiable/credential.go
+++ b/verifiable/credential.go
@@ -1756,7 +1756,7 @@ func (vc *Credential) CreateSignedCOSEVC(
 		return nil, err
 	}
 
-	msg, err := claims.MarshaCOSE(signatureAlg, proofCreator, keyID)
+	msgRaw, msg, err := claims.MarshaCOSE(signatureAlg, proofCreator, keyID)
 	if err != nil {
 		return nil, err
 	}
@@ -1766,7 +1766,8 @@ func (vc *Credential) CreateSignedCOSEVC(
 		credentialContents: vc.Contents(),
 		ldProofs:           vc.ldProofs,
 		CWTEnvelope: &CWTEnvelope{
-			Sign1MessageRaw: msg,
+			Sign1MessageRaw:    msgRaw,
+			Sign1MessageParsed: msg,
 		},
 	}, nil
 }
diff --git a/verifiable/credential_cwt.go b/verifiable/credential_cwt.go
index bf99c54..08ac082 100644
--- a/verifiable/credential_cwt.go
+++ b/verifiable/credential_cwt.go
@@ -62,6 +62,6 @@ func (jcc *CWTCredClaims) MarshaCOSE(
 	signatureAlg cose.Algorithm,
 	signer cwt.ProofCreator,
 	keyID string,
-) ([]byte, error) {
+) ([]byte, *cose.Sign1Message, error) {
 	return marshalCOSE(jcc, signatureAlg, signer, keyID)
 }
diff --git a/verifiable/presentation_cwt.go b/verifiable/presentation_cwt.go
index f64142c..95a55f7 100644
--- a/verifiable/presentation_cwt.go
+++ b/verifiable/presentation_cwt.go
@@ -33,6 +33,6 @@ func (c *CWTPresClaims) MarshalCWT(
 	signatureAlg cose.Algorithm,
 	signer cwt.ProofCreator,
 	keyID string,
-) ([]byte, error) {
+) ([]byte, *cose.Sign1Message, error) {
 	return marshalCOSE(c, signatureAlg, signer, keyID)
 }
diff --git a/verifiable/presentation_cwt_proof_test.go b/verifiable/presentation_cwt_proof_test.go
index df0cdfd..ac3b0b3 100644
--- a/verifiable/presentation_cwt_proof_test.go
+++ b/verifiable/presentation_cwt_proof_test.go
@@ -10,6 +10,7 @@ import (
 	"fmt"
 	"testing"
 
+	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 	"github.com/trustbloc/kms-go/spi/kms"
 	"github.com/veraison/go-cose"
@@ -32,8 +33,9 @@ func TestParsePresentationFromCWS_EdDSA(t *testing.T) {
 	cwtClaims, err := vp.CWTClaims([]string{}, false)
 	require.NoError(t, err)
 
-	cwtBytes, err := cwtClaims.MarshalCWT(cose.AlgorithmEdDSA, proofCreator, holderKeyID)
+	cwtBytes, msg, err := cwtClaims.MarshalCWT(cose.AlgorithmEdDSA, proofCreator, holderKeyID)
 	require.NoError(t, err)
+	assert.NotNil(t, msg)
 
 	hexStr := hex.EncodeToString(cwtBytes)
 	fmt.Println(hexStr)