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 0x08fae829345d1d2c8c2d051099b2f848a2ca078a2e0968f91fa44292fd7c9ccd. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1867e87c-c607-45e1-8d7e-a138ece2796d.json and https://artists.proofprofile.net/proofs/artist/1867e87c-c607-45e1-8d7e-a138ece2796d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Offenbach: La Grande-Duchesse de Gérolstein, Act 1: Overture
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 0x6f4000607817e14ea07c58196b63a89afba457be3c9658590cc3bff9afe40dfa. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBAYC0402545.
Offenbach: La Grande-Duchesse de Gérolstein, Act 1: "Et Pif, Paf, Pouf" (Chorus, Fritz, Boum)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ed9036aac55b29f444b1a4192914332a24db80271a6672d0df4d4024e830bc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0402552.
Offenbach: La Grande-Duchesse de Gérolstein, Act 1: "Ah! C'est un fameux regiment" (Duchesse, Chorus, All)
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: "Dites lui qu'on l'a remarqué" (Duchesse, Fritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaaa3e0f6a0729319b780c118cb1c9476261959c660899deceaa9f48d7a14372. 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/GBAYC0402582.
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.
Offenbach: La Grande-Duchesse de Gérolstein, Act 1: "A cheval sur la discipline ... " (Boum, Chorus, Fritz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a7fb5b778e3e61c110eb1f0c03666e86a38445f228acf2fe54d8567382781e. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBAYC0402550.
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
Offenbach: La Grande-Duchesse de Gérolstein, Act 1: "Ah! que j'aime les militaires" (Duchesse, Fritz, Puck, Boum, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66642c00264cabef1ae9a90fe2d4ddedf017b202921aa7f0f1361d6d161a3b9. 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/GBAYC0402557.
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.
La Grande Duchess de Gerolstein, Acte III (Tableau 1): No 14 bis: Duetto 'O grandes leçons du passé' (Duchesse/Boum)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f4da9e2398cadcc63fbb4064835bfba0d99876eb86128365bcffe5221d14b5. 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/GBAYC0402595.