Privacy

What we receive

Only SHA-256 fingerprints. Your files are hashed in your browser and never leave your device.

What we store

Fingerprints, the Merkle roots built from them, the blockchain anchors and their proofs. Nothing in there can be turned back into your file.

What we do not do

• No third-party scripts, no analytics, no advertising, no fingerprinting of visitors.
• No cookies, except a strictly necessary session cookie on dashboards (there is none on this page).
• Server request logs are kept for 7 days, for rate limiting only, then deleted.

On the blockchains

A fingerprint you stamp is written to public blockchains and cannot be withdrawn. Only stamp fingerprints of files you are comfortable committing to a public record (the fingerprint, not the file, is what is published).