Private SHA-256 file proofs without uploading the original
About HashDocket
HashDocket hashes files locally in the browser, can create a free OpenTimestamps Bitcoin receipt, and offers optional paid public proof records with Bitcoin payments. The original file stays on the user's device.
PlatformsWeb, API
LaunchedSep 18, 2026
✓ VerifiedSep 18, 2026
Key features
- Local SHA-256 hashing
- No source file upload
- Free OpenTimestamps receipt
- Public proof registry
- Bitcoin payment packs
- Read-only verification API
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