1SatSnap

A cryptographic fingerprint, anchored to Bitcoin. Your original file never leaves your device.

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Time-sealing
Developer Tool
Accepts BSV

1SatSnap timestamps any file on Bitcoin SV. Take a photo or pick a file you already have, and your device calculates its fingerprint — only that fingerprint is written to the chain. The file itself never leaves your device. You get a proof link, a certificate and a portable proof file. Anyone can verify it from the file alone, without an account and without trusting 1SatSnap. It proves the file existed no later than a specific Bitcoin block, and that it has not changed by one byte since.

Key Features

Anchored to Bitcoin SV mainnet — a real OP_RETURN transaction, not a private ledger
Merkle-batched — up to 1,000 files share one transaction, which is why it stays free
Proof link — a shareable URL anyone can open
Proof file — a portable file you keep. It verifies even if 1SatSnap disappears entirely
Certificate — a printable certificate of existence with the seal
Proof card — a 1080×1350 image for sharing on social
QR code — for the proof link.

BSV Integration

Free to use ,private by design,no wallet required,bitcoin Secured. Photo — take one in the app, stamped the instant it's shot Video — record up to 2 minutes, stamped on stop Any file — pick anything already on your device: documents, audio, archives, spreadsheets.