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 0xe01d5f8cba542edd0371d29f86f120f54c9d4887f91fa892f047e2a1b495263b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e8c8d1b-c7ba-44f3-89d0-5133af81bc72.json and https://artists.proofprofile.net/proofs/artist/5e8c8d1b-c7ba-44f3-89d0-5133af81bc72.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La vestale, Act I: Air. L’amour est un monstre barbare
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 0x0dcf29e057d2860c4441db29eda6fed9b577af1f6a4d6d4c47481cc7d1bfec64. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITJXZ2300410.
La vestale, Act I: Récit et Scène. Mars a guidé nos pas aux champs de la victoire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aa72a4264146e2419376145fadcd16e0d86fdd2f6950d5aa0f3ed5a79a1133. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITJXZ2300414.
La Périchole, Acte I: Complainte. Le conquérant dit à la jeune Indienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2f4931781bcff094a10e6b0079973d9a2424157e9bb8854cdad5b5510459de. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES75S1900112.
La Périchole, Acte I: Couplets de la lettre. Ô mon cher amant, je te jure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3ea5acd1f8176c316dcd037b05fae32b1ea493210a6b20589ac7f529e77e2f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES75S1900116.
La Périchole, Acte I: Dialogue. Me voilà, moi !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1efae99a99704db9a92940951aca2d0b87e4f389b0cd57ba926b8c886d740b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES75S1900117.
La vestale, Act I: Hymne du matin. Fille du ciel, éternelle Vesta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc40c7a5974115c4fa04a032c751bdafe3767415f00607fc31a89b83f4852d4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITJXZ2300407.
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
La vestale, Act I: Récit. Pour la dernière fois
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3dafdc84a8c53e953b59d9f4e4165bd604c60c8f8f33f2b974232d1439aa2f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITJXZ2300409.
La vestale, Act I: Scène. Grands dieux ! Soutenez ma faiblesse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf222f050cea534ce51b578888bd2ef1764585e38a49685b0a38275bcfa1a29e9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITJXZ2300416.
La vestale, Act II: Récit. Du plus auguste ministère
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c28f8ba765c975d0397248f1bb814348d04d6e7d4e63440bdd51b96f198df04. 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/ITJXZ2300422.
La Périchole, Acte I: Dialogue. Dis-moi, Piquillo ?...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6266c648a6e84beca55d27b66882597e89fe83bd242edef9b62f401665d85ea0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/ES75S1900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6553604d89923bc067fe8bc11ed4ef769a03245e8410a4b7926784a6d86525ec. 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/ES75S1900113.
La Périchole, Acte I: Séguedille. Vous a-t-on dit souvent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32fd29d71b7ca87dc8c2c4372d60ae13ff816e6ef7fd7bf4f556fa6df3431e0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ES75S1900114.
La Périchole, Acte I: Dialogue. Allons, messieurs, un peu de courage à la poche
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fe328d3b6582caa2fc676fbe36ca63580ddc0d57eb0ed0ec42ec2b9f2021e8. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ES75S1900115.
La Périchole, Acte I: Couplets de la griserie. Ah ! quel dîner je viens de faire !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe913e1b7ae016f11c7c405a7498450e7a6737dbd0369214daf7bfdac230469. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/ES75S1900119.
La Périchole, Acte I: Suite du Finale. Ah ! les autres étaient bien gris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cff71767a9289f2eba04367b74c7ec03ca2ad8f5228f4833161a4dbf2dc09f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES75S1900120.