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 0x1985acfe524a1416fd2de98bc7377a272603b8ad701073190b905d86aae8a556. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcf03ee9-bf97-4073-830f-b05d7c4daaf4.json and https://artists.proofprofile.net/proofs/artist/bcf03ee9-bf97-4073-830f-b05d7c4daaf4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Mikado, Act I: Behold the Lord High Executioner! (Nobles, Ko-Ko)
Sir Geraint Evans/Glyndebourne Chorus/Pro Arte Orchestra/Sir Malcolm Sargent
The History of Opera: English Language Opera
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 0x5949d54a72087d3a9dd0c6e7c7b83a9735ecf197163ea05421bf3bb2a1f70e65. 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/GBAYC8700573.
The Mikado, Act II: A More Humane Mikado (Mikado, Nobles)
Owen Brannigan/Glyndebourne Chorus/Pro Arte Orchestra/Sir Malcolm Sargent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693cea18ed22a25548ab3ff542c57e6f2133541af9c7ee3f3ec9ff687848e937. 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/GBAYC8700588.