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 0xde6f51d7b4b747c97a9fbd1b752e4fccb7ce7cf641d5fe7c199b8c8988918acb. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88c51a3e-b2e0-44a8-8f89-47f48aaaa418.json and https://artists.proofprofile.net/proofs/artist/88c51a3e-b2e0-44a8-8f89-47f48aaaa418.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Gounod: Roméo et Juliette, Act 3: "Ah ! Jour de deuil et d'horreur et d'alarmes" (Roméo, Le Duc, Capulet, Stéphano, Benvolio, Chœur)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23fdbcf8a3436fca73859d0fa4eb9adc42ad87c9716d6794bf893a3cbe45dc75. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYC9500072.
Offenbach: La vie parisienne, Act 1: Chœur. "À Paris, nous arrivons en masse" - "Je suis Brésilien, j'ai de l'or" (Gardefeu, Le Baron, La Baronne, Le Brésilien, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcad84d8a8011ced9e0ec3ba55d673c6703ec7c82aec04c76058015235752315. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRZ117605482.
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
Gounod: Roméo et Juliette, Act 3: "Allons ! Tu ne me connais pas Tybalt" (Roméo, Tybalt, Mercutio, Chœur, Stéphano, Benvolio, Pâris, Gregorio)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012f3e067575251877109fcdc645547ef61d6efa62e856f245a426db9184e66a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBAYC9500068.
Offenbach: La vie parisienne, Act 1: Ouverture - Chœur. "Nous sommes employés de la ligne de l'Ouest" - Dialogue. "À quelle heure arrive le train de Trouville ?" (Chœur, Bobinet, Gardefeu, L'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab73c48017b59360fdace899789b151eb1705536333992ac6b5d7531826fbb43. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRZ117605593.
Offenbach: La vie parisienne, Act 4: Finale. "Par nos chansons et par nos cris, célébrons Paris" (Chœur, Gabrielle, Le Baron, La Baronne, Bobinet, Gardefeu, Le Brésilien, Urbain, Métella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fa4aa2c62590a94982c84ea4eb247903c54f3b89880c2148a00655b52bbd0b. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FRZ117605498.
Gounod: Roméo et Juliette, Act 3: " Ô jour de deuil ! Ô jour de larmes !" (Stéphano, Roméo, Benvolio, Pâris, Gregorio, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb3d925a75a988aea1a1a51ed1442f7235b947fe36d3565e236788b550739b9. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBAYC9500070.
Offenbach: La vie parisienne, Act 3: Finale. "Soupons, soupons, c'est le moment" (Le Baron, Gabrielle, Pauline, Louise, Clara, Léonie, Prosper, Urbain, Bobinet, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855c162535494718cbb37b29ba44f7063ee1e0c10c3b6c667c0e7a2dc5d087c0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRZ117605494.
Offenbach: La vie parisienne, Act 1: Chœur. "Le ciel est noir, il va pleuvoir" - Quatuor. "Métella !" - Dialogue. "Gardefeu !" (Bobinet, Gontran, Gardefeu, Métella, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a38c3bf96a20a822b142fa2e6602fbf912cb5da1b1d0961b82b74f66ef737. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRZ117605478.
Offenbach: La vie parisienne, Act 2: Dialogue. "Vous savez maintenant ce que c'est qu'un majors" - Finale. "Nous entrons dans cette demeure" - "Je suis veuve d'un colonel" (Gardefeu, Frick, L
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124b7229b1d3ca13b344183072caa79bc3177e4568389de29ca121511141b27e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZ117605486.
Offenbach: La vie parisienne, Act 4: Chœur. "En avant les jeunes femmes" - Duo. "Hier, à midi, la gantière…" Texte (Chœur, Le Baron, La Baronne, Bobinet, Métella, Gardefeu, Gabrielle, Le Brés
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440e1a67efd3fbedc6f480dfafef79372db3d005e13e74701ac71efb8ac71a1c. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FRZ117605497.
Offenbach: La vie parisienne, Act 4: Chœur. "Bien bichonnés et bien rasés" (Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb8e32acdbcd428ea3e029180393df412e882d0dc63ca169d0773f532b4efd9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRZ117605495.
Offenbach: La vie parisienne, Act 4: Dialogue. "La maison compte sur vous, messieurs" - Couplets. "Avant toute chose il faut être mystérieux" (Alfred, Chœur, Le Baron, Métella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e88877ea60ff109dd797b2b1a64eb94842457d3a01dc49490e39a6d7d0ba779. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRZ117605496.
Delibes: Lakmé, Act 2: Scène et légende de la fille du Paria. "Par les dieux inspirés" - Air des clochettes. "Où va la jeune Hindoue" (Lakmé, Nilakantha, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe765f4ba1377af4d021efed90b3f1efbb39f95a280caf0c54b2159e28d9a52df. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FRZ119702970.
Delibes: Lakmé, Act 1: Scène. "À l'heure accoutumée" (Chœur, Nilakantha)
Orchestre National Du Capitole De Toulouse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6157d12933535b67e1bc0c5bc16b761e92a189e0d99f3448733e9468927fff13. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRZ119702720.