diff --git a/encoding/cid.go b/encoding/cid.go
index 440bf04..6f665ad 100644
--- a/encoding/cid.go
+++ b/encoding/cid.go
@@ -47,7 +47,7 @@ func (cid *CID) getPrefixBytes() []byte {
 
 func (cid *CID) ToBytes() []byte {
 	if cid.Type == types.CIDTypeBridge {
-		return cid.Hash.FullBytes
+		return cid.Hash.fullBytes
 	} else if cid.Type == types.CIDTypeRaw {
 		sizeBytes := utils.EncodeEndian(cid.Size, 8)
 
@@ -58,10 +58,10 @@ func (cid *CID) ToBytes() []byte {
 			sizeBytes = []byte{0}
 		}
 
-		return utils.ConcatBytes(cid.getPrefixBytes(), cid.Hash.FullBytes, sizeBytes)
+		return utils.ConcatBytes(cid.getPrefixBytes(), cid.Hash.fullBytes, sizeBytes)
 	}
 
-	return utils.ConcatBytes(cid.getPrefixBytes(), cid.Hash.FullBytes)
+	return utils.ConcatBytes(cid.getPrefixBytes(), cid.Hash.fullBytes)
 }
 
 func Decode(cid string) (*CID, error) {
diff --git a/encoding/encrypted_cid.go b/encoding/encrypted_cid.go
index 79da39d..5e528e5 100644
--- a/encoding/encrypted_cid.go
+++ b/encoding/encrypted_cid.go
@@ -76,7 +76,7 @@ func (c *EncryptedCID) ToBytes() []byte {
 		c.encryptionAlgorithm,
 		byte(c.chunkSizeAsPowerOf2),
 	}
-	data = append(data, c.encryptedBlobHash.FullBytes...)
+	data = append(data, c.encryptedBlobHash.fullBytes...)
 	data = append(data, c.encryptionKey...)
 	data = append(data, utils.EncodeEndian(c.padding, 4)...)
 	data = append(data, c.OriginalCID.ToBytes()...)
diff --git a/encoding/multihash.go b/encoding/multihash.go
index 81cf1fb..6e2361d 100644
--- a/encoding/multihash.go
+++ b/encoding/multihash.go
@@ -19,22 +19,26 @@ var (
 type MultihashCode = int
 
 type Multihash struct {
-	FullBytes []byte
+	fullBytes []byte
+}
+
+func (m *Multihash) FullBytes() []byte {
+	return m.fullBytes
 }
 
 var _ json.Marshaler = (*Multihash)(nil)
 var _ json.Unmarshaler = (*Multihash)(nil)
 
 func NewMultihash(fullBytes []byte) *Multihash {
-	return &Multihash{FullBytes: fullBytes}
+	return &Multihash{fullBytes: fullBytes}
 }
 
 func (m *Multihash) FunctionType() types.HashType {
-	return types.HashType(m.FullBytes[0])
+	return types.HashType(m.fullBytes[0])
 }
 
 func (m *Multihash) HashBytes() []byte {
-	return m.FullBytes[1:]
+	return m.fullBytes[1:]
 }
 
 func MultihashFromBase64Url(hash string) (*Multihash, error) {
@@ -53,26 +57,26 @@ func MultihashFromBase64Url(hash string) (*Multihash, error) {
 }
 
 func (m *Multihash) ToBase64Url() (string, error) {
-	return bases.ToBase64Url(m.FullBytes)
+	return bases.ToBase64Url(m.fullBytes)
 }
 
 func (m *Multihash) ToBase32() (string, error) {
-	return bases.ToBase32(m.FullBytes)
+	return bases.ToBase32(m.fullBytes)
 }
 
 func (m *Multihash) ToString() (string, error) {
 	if m.FunctionType() == types.HashType(types.CIDTypeBridge) {
-		return string(m.FullBytes), nil // Assumes the bytes are valid UTF-8
+		return string(m.fullBytes), nil // Assumes the bytes are valid UTF-8
 	}
 	return m.ToBase64Url()
 }
 
 func (m *Multihash) Equals(other *Multihash) bool {
-	return bytes.Equal(m.FullBytes, other.FullBytes)
+	return bytes.Equal(m.fullBytes, other.fullBytes)
 }
 
 func (m *Multihash) HashCode() MultihashCode {
-	return utils.HashCode(m.FullBytes[:4])
+	return utils.HashCode(m.fullBytes[:4])
 }
 
 func (b *Multihash) UnmarshalJSON(data []byte) error {
@@ -81,7 +85,7 @@ func (b *Multihash) UnmarshalJSON(data []byte) error {
 		return err
 	}
 
-	b.FullBytes = decodedData
+	b.fullBytes = decodedData
 	return nil
 }
 func (b Multihash) MarshalJSON() ([]byte, error) {
diff --git a/encoding/multihash_test.go b/encoding/multihash_test.go
index bd1b0bb..a038c92 100644
--- a/encoding/multihash_test.go
+++ b/encoding/multihash_test.go
@@ -21,7 +21,7 @@ func TestFromBase64Url(t *testing.T) {
 		{
 			name:    "Valid Base64 URL Encoded String",
 			args:    args{hash: testdata.MediaBase64CID},
-			want:    &Multihash{FullBytes: testdata.MediaCIDBytes},
+			want:    &Multihash{fullBytes: testdata.MediaCIDBytes},
 			wantErr: false,
 		},
 		{
@@ -51,7 +51,7 @@ func TestFromBase64Url(t *testing.T) {
 		{
 			name:    "Long String",
 			args:    args{hash: "uYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWFh"},
-			want:    &Multihash{FullBytes: []byte(strings.Repeat("a", 750))},
+			want:    &Multihash{fullBytes: []byte(strings.Repeat("a", 750))},
 			wantErr: false,
 		},
 	}
@@ -95,7 +95,7 @@ func TestMultihash_FunctionType(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			m := &Multihash{
-				FullBytes: tt.fields.FullBytes,
+				fullBytes: tt.fields.FullBytes,
 			}
 			if got := m.FunctionType(); got != tt.want {
 				t.Errorf("FunctionType() = %v, want %v", got, tt.want)
@@ -131,7 +131,7 @@ func TestMultihash_ToBase32(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			m := &Multihash{
-				FullBytes: tt.fields.FullBytes,
+				fullBytes: tt.fields.FullBytes,
 			}
 			got, err := m.ToBase32()
 			if (err != nil) != tt.wantErr {
@@ -172,7 +172,7 @@ func TestMultihash_ToBase64Url(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			m := &Multihash{
-				FullBytes: tt.fields.FullBytes,
+				fullBytes: tt.fields.FullBytes,
 			}
 			got, err := m.ToBase64Url()
 			if (err != nil) != tt.wantErr {
@@ -198,7 +198,7 @@ func TestNewMultihash(t *testing.T) {
 		{
 			name: "Valid Base64 URL Encoded String",
 			args: args{fullBytes: testdata.RawCIDBytes},
-			want: &Multihash{FullBytes: testdata.RawCIDBytes},
+			want: &Multihash{fullBytes: testdata.RawCIDBytes},
 		},
 	}
 	for _, tt := range tests {
diff --git a/metadata/file_version.go b/metadata/file_version.go
index 4ea2015..0ad7f99 100644
--- a/metadata/file_version.go
+++ b/metadata/file_version.go
@@ -43,7 +43,7 @@ func (fv *FileVersion) EncodeMsgpack(enc *msgpack.Encoder) error {
 	if len(fv.Hashes) > 0 {
 		hashesData := make([][]byte, len(fv.Hashes))
 		for i, hash := range fv.Hashes {
-			hashesData[i] = hash.FullBytes
+			hashesData[i] = hash.FullBytes()
 		}
 		fmap.Put(9, hashesData)
 	}