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 0x3549706c26bb59cf2bd84136f9be543f8f200dfd97808f8d741992a616f3819e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8223b899-f9d2-4e62-908b-4c19d6d5c7b7.json and https://artists.proofprofile.net/proofs/artist/8223b899-f9d2-4e62-908b-4c19d6d5c7b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Puccini: Madama Butterfly, Act 1: "L'Imperial Commissario" (Goro, Pinkerton, Butterfly, Una cugina, Madre di Butterfly, Sharpless, Yakusidé, La Zia, Chorus)
Coro dell'Accademia Nazionale Di Santa Cecilia
Orchestra dell'Accademia Nazionale di Santa Cecilia
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 0x7cb4598d55aa995c065ab682deab58c82198311fa83262f1fe8617a437967337. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAYC0802902.
Puccini: Madama Butterfly, Act 1: "Auguri molti" (Il Commissario, Pinkerton, Sharpless, Ufficiale, Cugina, Madre, Zia, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf284592d8eb53dba3ad7d265cab04f411e872b78f64a0118a0182510e3c15ffb. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/GBAYC0802906.
Puccini: Madama Butterfly, Act 1: "Cio-Cio-san! Abbominazione!" (Bonzo, Butterfly, Goro, Yakusidé, Cugina, Madre, Zia, Pinkerton, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6362849dc8f5a5392bce0e48ec454ee9412c1bb066779d4706fdc9ec27e2009c. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/GBAYC0802907.
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