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 0x8d92d9c26b800e84ae1cdcdd6edbfeb755c138274d9f5b61aa78e128e07bf331. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c798e646-f71d-4129-8a5c-c4795b43e05e.json and https://artists.proofprofile.net/proofs/artist/c798e646-f71d-4129-8a5c-c4795b43e05e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Kirkby, Emma: Musique and Sweet Poetrie - Jewels From Europe Around 1600
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 0xd9c6b27139d772329507d8b93610dfb2d902c2e715fa5158ffd42cee83fd8313. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEP0605020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4ba49a440b14d6f909969e89d16b95c83d1fb1541a3bd3ff8e8d502cd84f47. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEP0605130 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ed41f7a3e7edd8e243a4ff63020cfecc031948282e4a01affb991d7b300683. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ149028230 — a six-check JSON result.
Les Indes galantes, RCT 44, Nouvelle Entrée, Scène 6: Danse du Grand Calumet de la Paix (Danse des Sauvages)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70aa98e4a5fd28da5bbea0a50857805fdcf6a3665d3506ce9c53c012e5e683d8. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ149131100 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa100745832acbb342a6efb288df495714a7220f414e6c0f5bfa677eb4e382096. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1922001 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786f8b7f0f71f1891ff860b6c0cfd5276d42ea0b15f22943c258d6ff80d0fbb9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1922002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d38ba5625795b74f12185cea3641da922f245112f72ec0b00c714dd50aeee. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1922003 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138ca2909c0c074197657fbd4de4429c87e9b2e36938c918fba78447290bfbfb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL1922009 — a six-check JSON result.
Les Plaisirs du Louvre, Airs pour la Chambre de Louis XIII
Ballet des Nymphes bocagères de la forêt sacrée: "Reine que je sers et que je connais" (Concert de Diane et ses Nymphes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b671bf8eede991a84b47e2e686e9b696835ac0219b85da704bebd5bc8d1d0b9. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939010 — a six-check JSON result.
Ballet des Nymphes bocagères de la forêt sacrée: "Bien loin profanes de ces lieux" (Concert des Nymphes des Bois)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bda06bc6e35f8ed4c37c5275fe14ecfbd6dbbe588e0d67c69268016406eb7e2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939020 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4609adf5090294c2067a11593cf3538ebe525562d1f63637f231f2ace2ab53. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939030 — a six-check JSON result.
La Dépouille d'Égypte: "Cesse mortel d'importuner" (Juste mespris de saincte Agnez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9ee6b84ae475a9466e99e874334f0bac14dc26331d7f2c871273bca95565d9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939040 — a six-check JSON result.
Ballet du Mariage de Pierre de Provence et de la belle Maguelonne: "Rompez les charmes du sommeil" (Air de la Ridicule)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc028b9f05235680d0455ecdb02aa54fb76002562346dcfe545b1c215233e5d8f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939060 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb700b2a212f11296129b5ddfcdcbfa1be5a1c4c6415aa0321864a333f82db53c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939070 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1de25186c3f6afb77fed6d2d8dd90379537083d44cb489667a3acd525c5f2b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939080 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce36f34357527e7d1526854453439a30df3bc38b992f29ca092fad085e709c7. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939090 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521adf990b67a5c2e8c6cada0102c2ccf8209748ec6e8ea17bbc66fae1ee79b4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939100 — a six-check JSON result.
Ballet du Monde renversé: "Il sort de nos corps emplumés" (Concert de différents oyseaux)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5c4f8c77854aee998d3bcc623a1e7615c3d633de771463ddf6248dba93639a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939140 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bcf4c9576e76b3f3f9c5b79a4b0634fcbd9896beb1fd54a3bf344709484c494. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1939190 — a six-check JSON result.
Etienne Moulinié: Meslanges pour la Chapelle d'un Prince
N'espérez plus mes yeux... Airs sérieux et à boire, Vol. 3
Sous l'Empire d'Amour - French Songs for Mezzo-Soprano and Lute
L'air italien en France au temps de Louis XIII
Moulinie: Airs With Lute Tablature (First Book, 1624)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c479730d8aaf07591a8355eda2be90b26d4b4a7fe51ececf7ec078aece1ecd. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AUAB00450317 — a six-check JSON result.
Reinas, Airs en espagnol à la cour de Louis XIII
Fiori musicali: Songs & Dances of the 16th & 17th Centuries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f05fe8fdabc603eb41d317e4978a244974b1be71123fa941c08acc27a23a209. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITJ092100512 — a six-check JSON result.
Si vous vouliez un jour…airs serieux et à boire, Vol. 2
Nova Europa (Mélodies d'un monde en mutation)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb053cb5b68a17b4b10902bc190d8725f22dee0368ad781b4689da3f7d53f646f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZDG1401210 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963d375356354290d7f6793e935b5caaf112515d29f58093a5c2249a00de81cf. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZDG1401218 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378c33dea8910dfe89bc9e8198a74dc4e541da0b58cb644b3331b0cfb88db2a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZDG1401219 — a six-check JSON result.
Vocal Music (17Th Century) Vicent, D. / Guedron, P. / Moulinie, E. / Lambert, M. / Cavalli, F. (Echo De Paris - Parisian Love Songs)
"Now What Is Love?" Aspects of Love in the 17th Century
Airs à boire anciens et poèmes sur le vin, XIIIe au XVIIe siècles (Mono Version)
Chansons espagnoles à la Cour de France au XVIIe siècle (Mono Version)
Concert français pour violes de gambe (Mono Version)