diff --git a/src/hooks/useSigitMeta.tsx b/src/hooks/useSigitMeta.tsx
index 22a6a6d..dc05559 100644
--- a/src/hooks/useSigitMeta.tsx
+++ b/src/hooks/useSigitMeta.tsx
@@ -3,7 +3,8 @@ import {
   CreateSignatureEventContent,
   DocSignatureEvent,
   Meta,
-  SignedEventContent
+  SignedEventContent,
+  Timestamp
 } from '../types'
 import { Mark } from '../types/mark'
 import {
@@ -59,6 +60,8 @@ export interface FlatMeta
   signersStatus: {
     [signer: `npub1${string}`]: SignStatus
   }
+
+  timestamps?: Timestamp[]
 }
 
 /**
@@ -163,7 +166,6 @@ export const useSigitMeta = (meta: Meta): FlatMeta => {
             setEncryptionKey(decrypted)
           }
         }
-
         // Temp. map to hold events and signers
         const parsedSignatureEventsMap = new Map<
           `npub1${string}`,
@@ -277,6 +279,7 @@ export const useSigitMeta = (meta: Meta): FlatMeta => {
     createSignature: meta?.createSignature,
     docSignatures: meta?.docSignatures,
     keys: meta?.keys,
+    timestamps: meta?.timestamps,
     isValid,
     kind,
     tags,
diff --git a/src/types/core.ts b/src/types/core.ts
index 5d4e4ac..ea12271 100644
--- a/src/types/core.ts
+++ b/src/types/core.ts
@@ -43,6 +43,14 @@ export interface Sigit {
 export interface Timestamp {
   nostrId: string
   timestamp: string
+  isComplete?: boolean
+}
+
+export interface TimestampUpgradeResponse {
+  upgraded: boolean
+  nostrId: string
+  timestamp: string
+  isComplete: boolean
 }
 
 export interface UserAppData {
diff --git a/src/types/opentimestamps.d.ts b/src/types/opentimestamps.d.ts
index 5c45488..f3398d2 100644
--- a/src/types/opentimestamps.d.ts
+++ b/src/types/opentimestamps.d.ts
@@ -3,13 +3,14 @@ interface OpenTimestamps {
   DetachedTimestampFile: {
     fromHash(op: any, hash: Uint8Array): any
     fromBytes(op: any, buffer: Uint8Array): any
+    deserialize(buffer: any): any
   }
 
   // Stamp the provided timestamp file and return a Promise
   stamp(file: any): Promise<void>
 
   // Verify the provided timestamp proof file
-  verify(file: any): Promise<void>
+  verify(ots: string, file: string): Promise<void>
 
   // Other utilities or operations (like OpSHA256, serialization)
   Ops: {
@@ -25,5 +26,5 @@ interface OpenTimestamps {
   deserialize(bytes: Uint8Array): any
 
   // Other potential methods based on repo functions
-  upgrade(file: any): Promise<void>
+  upgrade(file: any): Promise<boolean>
 }