diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index 863da412d..a44a03386 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -1372,21 +1372,30 @@ func (bc *Blockchain) GetTestVM() (*vm.VM, storage.Store) {
 	return vm, tmpStore
 }
 
-// verifyHashAgainstScript verifies given hash against the given witness.
-func (bc *Blockchain) verifyHashAgainstScript(hash util.Uint160, witness *transaction.Witness, checkedHash util.Uint256, interopCtx *interopContext, useKeys bool) error {
+// ScriptFromWitness returns verification script for provided witness.
+// If hash is not equal to the witness script hash, error is returned.
+func ScriptFromWitness(hash util.Uint160, witness *transaction.Witness) ([]byte, error) {
 	verification := witness.VerificationScript
 
 	if len(verification) == 0 {
 		bb := new(bytes.Buffer)
 		err := vm.EmitAppCall(bb, hash, false)
 		if err != nil {
-			return err
+			return nil, err
 		}
 		verification = bb.Bytes()
-	} else {
-		if h := witness.ScriptHash(); hash != h {
-			return errors.New("witness hash mismatch")
-		}
+	} else if h := witness.ScriptHash(); hash != h {
+		return nil, errors.New("witness hash mismatch")
+	}
+
+	return verification, nil
+}
+
+// verifyHashAgainstScript verifies given hash against the given witness.
+func (bc *Blockchain) verifyHashAgainstScript(hash util.Uint160, witness *transaction.Witness, checkedHash util.Uint256, interopCtx *interopContext, useKeys bool) error {
+	verification, err := ScriptFromWitness(hash, witness)
+	if err != nil {
+		return err
 	}
 
 	vm := bc.spawnVMWithInterops(interopCtx)
@@ -1396,7 +1405,7 @@ func (bc *Blockchain) verifyHashAgainstScript(hash util.Uint160, witness *transa
 	if useKeys && bc.keyCache[hash] != nil {
 		vm.SetPublicKeys(bc.keyCache[hash])
 	}
-	err := vm.Run()
+	err = vm.Run()
 	if vm.HasFailed() {
 		return errors.Errorf("vm failed to execute the script with error: %s", err)
 	}
diff --git a/pkg/core/blockchain_test.go b/pkg/core/blockchain_test.go
index f539b865b..0fa8b3aae 100644
--- a/pkg/core/blockchain_test.go
+++ b/pkg/core/blockchain_test.go
@@ -4,7 +4,10 @@ import (
 	"testing"
 
 	"github.com/CityOfZion/neo-go/pkg/core/storage"
+	"github.com/CityOfZion/neo-go/pkg/core/transaction"
+	"github.com/CityOfZion/neo-go/pkg/crypto/hash"
 	"github.com/CityOfZion/neo-go/pkg/io"
+	"github.com/CityOfZion/neo-go/pkg/util"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -65,6 +68,27 @@ func TestAddBlock(t *testing.T) {
 	assert.Equal(t, lastBlock.Hash(), bc.CurrentHeaderHash())
 }
 
+func TestScriptFromWitness(t *testing.T) {
+	witness := &transaction.Witness{}
+	h := util.Uint160{1, 2, 3}
+
+	res, err := ScriptFromWitness(h, witness)
+	require.NoError(t, err)
+	require.NotNil(t, res)
+
+	witness.VerificationScript = []byte{4, 8, 15, 16, 23, 42}
+	h = hash.Hash160(witness.VerificationScript)
+
+	res, err = ScriptFromWitness(h, witness)
+	require.NoError(t, err)
+	require.NotNil(t, res)
+
+	h[0] = ^h[0]
+	res, err = ScriptFromWitness(h, witness)
+	require.Error(t, err)
+	require.Nil(t, res)
+}
+
 func TestGetHeader(t *testing.T) {
 	bc := newTestChain(t)
 	block := newBlock(1, newMinerTX())