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 0xb452e13e92dd487e319f6d6f5b45ada6dff7de72f7344cb1738ce4498208bb58. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8cbcaa9-7ebc-46c2-8a62-689817d6254f.json and https://artists.proofprofile.net/proofs/artist/d8cbcaa9-7ebc-46c2-8a62-689817d6254f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Wagner: Die Meistersinger von Nurnberg, WWV 96 (Sung in Italian)
Verdi: La traviata, Act 1: Brindisi. "Libiamo ne' lieti calici" (Coro, Alfredo, Violetta, Flora, Marchese, Gastone, Barone)
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 0xceea57a1c81057bd8ff523bfd1023689d67e475d735fd2e62b3144afab0b8817. 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/GBAYC9201500 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Posa in pace, a’ bei sogni ristora" (Coro, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0f9a39b8e622c75965571627efa6b913b3e145e0447a9603b0002da7b95b71. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBAYC1401189 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "La rivedrà nell’estasi" (Riccardo, Oscar, Coro, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b081880bb3db82f5c177c3ddd3cd22b86728f5e97c104de3fd8e9c449a809fd. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBAYC1401192 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Volta la terrea" (Oscar, Riccardo, Giudice, Renato, Samuel, Tom, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42177bff9948b034942f6e6ee1e9297fcdd2a4c0dbc4bb54006c0a5313f38b9a. 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/GBAYC1401196 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Ogni cura si doni al diletto" (Riccardo, Renato, Oscar, Samuel, Tom, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e43714979ac6d40b74b86d21b881a9c9071fd28d89a313946610ddb74ab4b0c. 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/GBAYC1401197 — a six-check JSON result.
Adriana Lecouvreur / Act 1: "Del sultano Amuratte..." - Io son l'umile ancella
Orchestra dell'Accademia Nazionale di Santa Cecilia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8881c050950a78a0e081875349859ca5ce9b0b75370492e2bc4d4da45ee77f20. 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/GBF076141504 — a six-check JSON result.
Verdi: La traviata, Act 1: "Che è ciò?" (Coro, Alfredo, Violetta, Flora, Marchese, Gastone, Barone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d529c73d110511fbba204d84761ee3d94a3042548b3c1a3e44d6ad598a9050f. 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/GBAYC9201501 — a six-check JSON result.
Verdi: La traviata, Act 1: "Si ridesta in ciel l'aurora" (Coro, Violetta, Flora, Marchese, Gastone, Barone, Alfredo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e846564204e6830deb6d735fc66178d79b8f88773b4d5217dc28fa1201b8c3. 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/GBAYC9201504 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Chi voi siate, l'audace parola" (Ulrica, Riccardo, Samuel, Oscar, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84d60233db6a4a15e521ef27db06c4447a5b3038d2b2dc40e8391611fca8786. 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/GBAYC1401208 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "È scherzo od è follia" (Riccardo, Ulrica, Samuel, Tom, Oscar, Coro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d1b83b4409d470514c7b4bc167437836c64df9db5d29213899d7285be4c4ef. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBAYC1401209 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 1: "Finisci il vaticinio" (Riccardo, Ulrica, Coro, Samuel, Tom, Silvano, Oscar, Renato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5276df6e350eaab50cdb6bfdbc590b3f23e785a3a8ac4bf1c49a9b1fcd507480. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/GBAYC1401210 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 2: "Seguitemi" (Renato, Amelia, Coro, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38904f0fd443a1a58ce54189157af12dacc7410ab972e82ed7f8c9872f2dad7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1401221 — a six-check JSON result.
Verdi: Un ballo in maschera, Act 2: "Ve', se di notte qui colla sposa" (Renato, Amelia, Coro, Samuel, Tom)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7be3b7147989c2dc3ba99833827712a0cdf487339f67b10c58977732169ba2. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBAYC1401222 — a six-check JSON result.