ProofStack®
Trust less. Verify more.
Your file stays on your device. No storage. Your data is yours.
Proudly European.Built on European values.ONE PROOF LAYER.Four ways to prove what matters.
Sealed before even you receive it.
ProofCam seals each photo or video before the creator receives the file. Any later change—even by the creator—breaks the match with the original seal.
How it works ↗Get the apps
The store listings use the HashCam and HashDoc names pending ProofStack rebranding.