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 0x772414e0ed5042fe88d44e369eefbada58fc3524210999b0bca8a3aa59943416. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9555a742-428e-4f09-9b59-cb19df190abe.json and https://artists.proofprofile.net/proofs/artist/9555a742-428e-4f09-9b59-cb19df190abe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Charpentier: La descente d'Orphée aux enfers, H. 488
Ballet Royal de la Nuit, Première partie: Ouverture du Ballet
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x3e88b7fac0a1af6d349a0a685f308b40ce2374f991f51ea0c5d6ffc3e88b8657. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1829010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc85e2a2807e546fb8471159f63bbb52f86cf14aba731e03f7dba0a4a182dfd. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ141504010.
Le Concert royal de la Nuit, Troisième Veille, Hercule amoureux: "Dormi, dormi, o Sonno, dormi" (Aure, Ruscelli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f12d287145b337d1e7955a052c50de91b5ba71e6437cdf2f1c7a0e25a567267. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ141505120.
L'air italien en France au temps de Louis XIII
Reinas, Airs en espagnol à la cour de Louis XIII
Monteverdi: Donna - Madrigali e mottetti a due voci femminili
Lalande: Majesté (Collection Château de Versailles)
Deitatis Majestatem: I. Deitatis Majestatem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e0ba05ac0aab7af211559137222ba276e75722e9d21c80a4a4275888b4c607. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1796801.
Deitatis Majestatem: IV. O caro Christi vera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da98e5c6acc6f07a57a49e5dfda3bf2fc6c44daceb9c509e5cfb993c8080c12. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1796804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6064a6452b96b736bc1baf60ddf22e660e2f159718be753ae1fb40c4f14a3e5c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1796805.
Lambert & Le Camus: Airs de cour - Douce Félicité