Proof.ink
Proven immutable files – file hashes stored on the Hive blockchain for tamperproof file-fp
Proof.ink is a web service that fingerprints files (documents, images, software, etc.) using SHA256 entirely in the browser, then stores the resulting hash on the Hive blockchain for tamper-proof integrity verification. Users can later validate a file by selecting it together with a proof certificate file. The service requires a Hive account and a small Hive/HBD transfer to store the fingerprint.
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