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 0x49368930d535f06ef9032e98d9f3859dec13b8016d03d708c81f10c0bdd3c436. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cba0a01-d8f3-4b90-93b6-c176b95b96fe.json and https://artists.proofprofile.net/proofs/artist/2cba0a01-d8f3-4b90-93b6-c176b95b96fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musique classique 50 : Les cinquante meilleurs chefs-d'œuvre de compositeurs les plus célèbres dans le monde les
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 0x3ecf918a6188b6fb3d009da063ff0e9dc88bcfef89959406fb72342f4eaf5293. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBG3H1500114.
The Best Classical Music:50 of the Most Famous and best loved pieces in the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecf918a6188b6fb3d009da063ff0e9dc88bcfef89959406fb72342f4eaf5293. 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/GBG3H1500114.
Classical Music 50: The Fifty Best Masterpieces from the Most Famous Composers In The World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecf918a6188b6fb3d009da063ff0e9dc88bcfef89959406fb72342f4eaf5293. 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/GBG3H1500114.