thumb|Nicolas Bernier, engraving by Étienne Ficquet Nicolas Bernier (28 June 1664 – 5 September 1734) was a French Baroque composer. Biography He was born in Mantes-sur-Seine (now Mantes-la-Jolie)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f2261bca5ba180d2276ef34aa25c3cb290fc19f57d8c5c62ba08a2ef477658. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d36ebea-f2bc-4caa-9c08-c104cc1622f7.json and https://artists.proofprofile.net/proofs/artist/8d36ebea-f2bc-4caa-9c08-c104cc1622f7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bernier - Deux motets : Laudate dominum & miserere mei deus