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SciMatic Proof-of-Record API

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The Proof-of-Record API records the SHA-256 hash of a file or database record and returns a signed receipt. Receipts are signed with ML-DSA-44, the NIST post-quantum signature standard, and anchored on SciChain. Later, anyone can check that a file still matches its receipt, on the website or offline with a small Node.js verifier and our published keys. Only the hash is sent, never the file. Free for 1,000 live receipts per organisation per month, with a no-login demo.

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