diff --git a/src/pages/create/index.tsx b/src/pages/create/index.tsx
index 7f39b11..0e9b1ec 100644
--- a/src/pages/create/index.tsx
+++ b/src/pages/create/index.tsx
@@ -20,6 +20,7 @@ import {
   CreateSignatureEventContent,
   Meta,
   ProfileMetadata,
+  Timestamp,
   User,
   UserRole
 } from '../../types'
@@ -61,6 +62,7 @@ import {
   faUpload
 } from '@fortawesome/free-solid-svg-icons'
 import { SigitFile } from '../../utils/file.ts'
+import { generateTimestamps } from '../../utils/opentimestamps.ts'
 
 export const CreatePage = () => {
   const navigate = useNavigate()
@@ -558,7 +560,8 @@ export const CreatePage = () => {
     fileHashes: {
       [key: string]: string
     },
-    zipUrl: string
+    zipUrl: string,
+    timestamps?: Timestamp[]
   ) => {
     const content: CreateSignatureEventContent = {
       signers: signers.map((signer) => hexToNpub(signer.pubkey)),
@@ -566,7 +569,8 @@ export const CreatePage = () => {
       fileHashes,
       markConfig,
       zipUrl,
-      title
+      title,
+      ...(timestamps && { timestamps })
     }
 
     setLoadingSpinnerDesc('Signing nostr event for create signature')
@@ -607,6 +611,10 @@ export const CreatePage = () => {
       const fileHashes = await generateFileHashes()
       if (!fileHashes) return
 
+      setLoadingSpinnerDesc('Timestamping your files')
+      const timestamps = await generateTimestamps(Object.values(fileHashes))
+      if (!timestamps) return
+
       setLoadingSpinnerDesc('Generating encryption key')
       const encryptionKey = await generateEncryptionKey()
 
@@ -631,7 +639,8 @@ export const CreatePage = () => {
         const createSignature = await generateCreateSignature(
           markConfig,
           fileHashes,
-          fileUrl
+          fileUrl,
+          timestamps
         )
         if (!createSignature) return
 
diff --git a/src/types/core.ts b/src/types/core.ts
index 8583d4a..b4cd18c 100644
--- a/src/types/core.ts
+++ b/src/types/core.ts
@@ -27,11 +27,13 @@ export interface CreateSignatureEventContent {
   markConfig: Mark[]
   title: string
   zipUrl: string
+  timestamps?: Timestamp[]
 }
 
 export interface SignedEventContent {
   prevSig: string
   marks: Mark[]
+  timestamps: Timestamp[]
 }
 
 export interface Sigit {
@@ -39,6 +41,11 @@ export interface Sigit {
   meta: Meta
 }
 
+export interface Timestamp {
+  fileHash: string
+  timestamp: string
+}
+
 export interface UserAppData {
   sigits: { [key: string]: Meta } // key will be id of create signature
   processedGiftWraps: string[] // an array of ids of processed gift wrapped events
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index 11053b9..1348642 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -119,3 +119,15 @@ export const settleAllFullfilfedPromises = async <Item, FulfilledItem = Item>(
     return acc
   }, [])
 }
+
+export const isPromiseFulfilled = <T>(
+  result: PromiseSettledResult<T>
+): result is PromiseFulfilledResult<T> => {
+  return result.status === 'fulfilled'
+}
+
+export const isPromiseRejected = <T>(
+  result: PromiseSettledResult<T>
+): result is PromiseRejectedResult => {
+  return result.status === 'rejected'
+}