Alexandre de Villeneuve (25 May 1677, Hyères – 1756)Birth certificate: . was an 18th-century French classical composer. Life thumb| A priest in Hyères, he was received in 1697 as a chorister in Saint
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 0x5a8a7fe9c116e871d6fc95569a06e2b1379f244c685c6dddcb1ea781e492bb49. Chain 2 (Bitcoin): anchored in block 953600 (2026-06-14T06:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0ed0fa99-7455-4c28-af1a-020c6a831113.json and https://artists.proofprofile.net/proofs/artist/0ed0fa99-7455-4c28-af1a-020c6a831113.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alexandre de Villeneuve: Livre de musique d'Église: No. 11, Deuxième leçon de ténèbres du troisième jour II