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 0x38b70af2e7e7c7f2366130de4652b45414d9e162339619b194004f55296aba5e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e490d7e2-55c5-4cd7-aa16-6c0186d667c9.json and https://artists.proofprofile.net/proofs/artist/e490d7e2-55c5-4cd7-aa16-6c0186d667c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Very Best Overtures & Melodies Of Gilbert & Sullivan
Overtures To The Gilbert & Sullivan Operas
Highlights From The Gondoliers & Iolanthe, Pt. 1
(Petit Battements) Modern Major-General's Song from the Pirates of Penzance
Music For Ballet Class - Well Known Melodies
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 0x22090a80f115739f9af6f4437b5b7a5ee04b9bfa2d0600a60804c1173cc1fac7. 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/QZX882312139.
(Rond De Jambe En L'aire) Poor Wandering One from The Pirates Of Penzance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9df692f63b5a20a08df39503bc74008078f0611e958199cbaa617cac89a4d9f. 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/QZX882312140.
(Medium Allegro 1) We Sail the Ocean Blue from H.M.S. Pinafore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de67051d001a71b19c6bc6eb07fae31c5edafb4866251274bc6520c96fac4ac. 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/QZX882312163.