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 0x2e09e51fd4ec7d06d0ec4aa2fdb2d84326e78821f8a2aed904340f300164ea3b. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a20075fa-010a-42ad-b32e-70dd54de5224.json and https://artists.proofprofile.net/proofs/artist/a20075fa-010a-42ad-b32e-70dd54de5224.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Offenbach: La Grande-Duchesse de Gérolstein, Act 1: "Ah! C'est un fameux regiment" (Duchesse, Chorus, All)
Offenbach: La Grande Duchesse de Gerolstein
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 0x8caf190eaa0184aea2324a99702d74baadc39d7744382f58d575f3077040571b. 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/GBAYC0402559.
Offenbach: La Grande-Duchesse de Gérolstein, Act 2: "Le carillon de ma grand-mére" (Duchesse, All)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64147951d0427abb28fcdd1b486d63d4d008bdd19502ca767c6764679c5ec23. 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/GBAYC0402589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaefda0c408e12b0a59c26b38ff0a7ebea70daa9ec36294bc0622f6ca6b7f923b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T20:57:41Z), 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/FR50X2186401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623e84d1a81e022091e586ec9df16a4ee06c6a5271281927f2f537f62216f268. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR50X2186412.
Offenbach: La Grande-Duchesse de Gérolstein, Act 1: "Voici le sabre de mon père" (Duchesse, All)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20370ffc26566d8000f90225b18c6fe8062c475a51f9fda99538e77647bd61ca. 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/GBAYC0402566.
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
2 chœurs, Op. 68: No. 1, Calme des nuits
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f835a32be63a1b38e36f91e2b14a6e49592c9c1c1fe99d502d3efb6c5e2ebf0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2186402.
2 chœurs, Op. 141: No. 1, Des pas dans l'allée
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358349bdecce9894f55f89fb662acd2826f2f25ddd117a54ac49525189247057. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2186404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4145ba40ea5a4e0f222d7e95bf23cdcb1014d079b61f0edd5012e44de5ecdd9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR50X2186405.
Chansons et madrigaux: No. 3, Pleurez avec moi !
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b13b9815a8d54f612690541c5a56a407efb950cbaabb6a8a344532257d3bc8. 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/FR50X2186407.