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 0x4948d7fdc1981b58515995345a0be53e94d6227a57ef5411a4b15639bdf790fc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7955b7bc-da1e-49db-a0e5-dd54037cf800.json and https://artists.proofprofile.net/proofs/artist/7955b7bc-da1e-49db-a0e5-dd54037cf800.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Comme des garçons (Original Motion Picture Soundtrack)
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 0x215f910cedb228c23638af1d02a466ef491b1a3823e90095ac296c8335eca28d. 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/NLF361801000.
The Accordion Lifestyle, Vol. 2 (Masters of the Accordion Play Traditional and Popular Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666a4607d26e71ed77b6e2e0b2b5b4236e7bbd6cac87c60d2081b90694dd8019. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR0W61493808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54805372c7598a4f937e89f3251c650bbb35c9667f97623c2ea1ed7b7adea16. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR0W61493803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1694dbb871c0ecf705bf1ebfb419ec4392663ae13e8573e03b65d26e4c7c07. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR0W61493787.
Dansez le paso doble (Toutes les musiques des stars de la danse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ef008421bdac62611a5c7e3b841ee4c7acc1549ab8756aea4d0280ce47c9b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR0W69998736.
Karaoké Playback Accordéon : Valse, Vol. 1
Eric Bouvelle à l'accordéon et Laurent Desmurs au piano (Arr. for Accordion and Piano)
Collection dancing, le programme dont vous rêvez, vol. 2
Collection dancing, le programme dont vous rêvez, vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e6b2a382e956a4cb704d65a9fd63c5be995f0702c251ddcedc0235c7830d5d. 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/FR0W61736222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040ca9d37084324c80fcbc9bd28ef8024838372bdb985ae7370e0658a2ddfd1b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR0W61726920.
Karaoké Playback Accordéon : Valse, Vol. 2
Karaoké Playback Accordéon : Paso-Doble, Vol. 1
Karaoké Playback Accordéon : Tango, Vol. 1
7 merveilles de la musique: Eric Bouvelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3a7d1d43fb4669910d0bdc634c368612e37fb62adedf62a30687464df463d9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR80T0900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37cabe90a409069f96797f70928a58da5d5ab66f3d70f1171f18fb1e3264b0b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR0W69921305.
Musette toujours: 100 chansons pour les amoureux de l'accordéon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c15564b183f4e222e99b00583ff0a33924aa7521a1f4413fcf116081108a88. 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/FR0W61478431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbed0f0579454f60ece7f9c73dea569623a7491d380ef21cc1f106abb47dba22. 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/FR0W61478432.
The Accordion Lifestyle, Vol. 1 (Masters of the Accordion Play Traditional and Popular Songs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4684654b3e43d12761f0be80368dddd4fc2e03c93969cfe4c954d05a43de92e8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR0W61493784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06554730c832fe999e0ea67612f8166ea409bafcf5dfa8dffb7c249bcea7635. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR0W61493805.