diff --git a/CHANGELOG.md b/CHANGELOG.md
index 51e8281..acaa914 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,14 +24,23 @@ All notable changes to this project will be documented in this file. The format
   - `pubKey.ToDER()` now returns bytes
   - `pubKey.ToHash()` is now `pubKey.Hash()` 
   - `pubKey.SerializeCompressed()` is now `pubKey.Compressed()`
+  - `pubKey.SerializeUncompressed()` is now `pubKey.Uncompressed()`
   - `pubKey.SerializeHybrid()` is now `pubKey.Hybrid()`
+  - updated `merklepath.go` to use new helper functions from `transaction.merkletreeparent.go`
   
   ### Added
+  - `transaction.Verify` which uses `merklepath.Verify` and ``
   - `publickey.ToDERHex()` returns a hex encoded public key
   - `script.Chunks` helper method for `DecodeScript(scriptBytes)`
   - `script.PubKey` returns a `*ec.PublicKey`
   - `script.PubKeyHex`
   - `script.Address`
+  - file `transaction.merkletreeparent.go` which contains helper functions
+    - `transaction.MerkleTreeParentStr`
+    - `transaction.MerkleTreeParentBytes`
+    - `transaction.MerkleTreeParents`
+  - file `transaction/chaintracker/whatsonchain.go` - chain tracker for whatsonchain.com
+  - Example - using the whatsonchain chain tracker
   - Example - get address and p2pkh pubkey from script
 
 ## [1.1.9] - 2024-10-01
diff --git a/primitives/ec/publickey_test.go b/primitives/ec/publickey_test.go
index 6dcd375..add3044 100644
--- a/primitives/ec/publickey_test.go
+++ b/primitives/ec/publickey_test.go
@@ -348,3 +348,39 @@ func TestBRC42PublicVectors(t *testing.T) {
 		})
 	}
 }
+
+func TestToDERHex(t *testing.T) {
+	for _, test := range pubKeyTests {
+		pk, err := ParsePubKey(test.key)
+		if err != nil {
+			if test.isValid {
+				t.Errorf("%s pubkey failed when shouldn't %v",
+					test.name, err)
+			}
+			continue
+		}
+		derHex := pk.ToDERHex()
+		if derHex != hex.EncodeToString(pk.ToDER()) {
+			t.Errorf("%s pubkey: ToDERHex does not match ToDER.",
+				test.name)
+		}
+	}
+}
+
+func TestToDER(t *testing.T) {
+	for _, test := range pubKeyTests {
+		pk, err := ParsePubKey(test.key)
+		if err != nil {
+			if test.isValid {
+				t.Errorf("%s pubkey failed when shouldn't %v",
+					test.name, err)
+			}
+			continue
+		}
+		der := pk.ToDER()
+		if !bytes.Equal(der, pk.ToDER()) {
+			t.Errorf("%s pubkey: ToDER does not match itself.",
+				test.name)
+		}
+	}
+}
diff --git a/primitives/ec/signature_test.go b/primitives/ec/signature_test.go
index 062816b..e94bbe2 100644
--- a/primitives/ec/signature_test.go
+++ b/primitives/ec/signature_test.go
@@ -14,6 +14,7 @@ import (
 	"testing"
 
 	crypto "github.com/bitcoin-sv/go-sdk/primitives/hash"
+	"github.com/stretchr/testify/require"
 )
 
 type signatureTest struct {
@@ -702,6 +703,8 @@ func TestRFC6979(t *testing.T) {
 				wantSigBytes)
 			continue
 		}
+
+		require.True(t, privKey.PubKey().Verify([]byte(test.msg), gotSig))
 	}
 }
 
@@ -724,4 +727,5 @@ func TestSignatureIsEqual(t *testing.T) {
 		t.Fatalf("value of IsEqual is incorrect, %v is not "+
 			"equal to %v", sig1, sig2)
 	}
+
 }
diff --git a/util/bytemanipulation_test.go b/util/bytemanipulation_test.go
index e27bc12..d39a62a 100644
--- a/util/bytemanipulation_test.go
+++ b/util/bytemanipulation_test.go
@@ -119,3 +119,33 @@ func TestReverseBytes(t *testing.T) {
 		)
 	})
 }
+
+func TestReverseBytesInPlace(t *testing.T) {
+	t.Parallel()
+
+	t.Run("Empty slice", func(t *testing.T) {
+		input := []byte{}
+		util.ReverseBytesInPlace(input)
+		require.Equal(t, []byte{}, input)
+	})
+
+	t.Run("Single byte", func(t *testing.T) {
+		input := []byte{0x01}
+		util.ReverseBytesInPlace(input)
+		require.Equal(t, []byte{0x01}, input)
+	})
+
+	t.Run("Multiple bytes", func(t *testing.T) {
+		input := []byte{0x01, 0x02, 0x03, 0x04}
+		expected := []byte{0x04, 0x03, 0x02, 0x01}
+		util.ReverseBytesInPlace(input)
+		require.Equal(t, expected, input)
+	})
+
+	t.Run("Odd number of bytes", func(t *testing.T) {
+		input := []byte{0x01, 0x02, 0x03, 0x04, 0x05}
+		expected := []byte{0x05, 0x04, 0x03, 0x02, 0x01}
+		util.ReverseBytesInPlace(input)
+		require.Equal(t, expected, input)
+	})
+}