Creating a proof
Add text, a photo, screenshot, receipt, contract, or file. DataStamp computes a SHA-256 hash on device and requests an OpenTimestamps proof for that hash.
Support
DataStamp is a local-first iOS app for creating and verifying OpenTimestamps proofs. Most proof data and records stay on your device, with optional private iCloud sync if enabled.
Pending confirmations
OpenTimestamps proofs may begin as pending and later upgrade after Bitcoin anchoring. Keep the proof record and refresh confirmation status when needed.
Verifying proofs
Use the Verify flow with an existing .ots proof and the matching original content. The hash must match for the proof to validate.
Privacy
DataStamp does not operate a central account, analytics backend, ad network, or tracking service. Read the full Privacy Policy.
Contact
For app support, use the DataStamp support/contact option from the App Store listing. Include your iOS version, app version, and a short description of the problem. Do not send private source documents unless you intentionally choose to share them.