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 0x46e6c82f77d05b6e875e303d8f7eaead5e0a447e2ac2b2f1167248fbb18b182d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4e250e2-9f12-419c-a20b-f2aca9eb41f5.json and https://artists.proofprofile.net/proofs/artist/c4e250e2-9f12-419c-a20b-f2aca9eb41f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les Grandes Eaux de Versailles (Musiques des fêtes royales)
Messe du Roi Soleil: Lully, Couperin & Delalande
Charpentier: Missa Assumpta est Maria, H. 11: XVII. Et in Spiritum sanctum
Mozart: Bastien et Bastienne - Pergolèse: La Servante Maîtresse
Haendel: Organ Concertos, Salve Regina & Saeviat tellus
Le Grand Jeu. French Baroque Organ Favourites