DISCERN is an instrument designed to provide users with a reliable way to measure the quality of written health information. It was originally developed by Deborah Charnock, Sasha Shepperd, Gill Needh
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815cd42de736b88489481e32ca48cdda293df9f60e7e2ee27e11f6750cfdf86d. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b35b4df6-e1d2-4792-bc26-2d8c178195e0.json and https://artists.proofprofile.net/proofs/artist/b35b4df6-e1d2-4792-bc26-2d8c178195e0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).