{"copyright_id":"0xe0d8ee8ce9d4180ef9b6c0bee2345180a567cc9e61baea0aac2356fc96fcf6a3","name":"Chr. Mannenkoor de Lofzang Heerde","registered_at":"2026-06-17T19:54:17Z","symbol":"NIM1497789","token_address":"0x3cebb9c5bc03d3faf833378881d4d6ed764b5a56","type":"artist","uuid":"9a70be0c-a63d-4c9d-9f11-0c3fb085e5fc"}
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 0xe0d8ee8ce9d4180ef9b6c0bee2345180a567cc9e61baea0aac2356fc96fcf6a3. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a70be0c-a63d-4c9d-9f11-0c3fb085e5fc.json and https://artists.proofprofile.net/proofs/artist/9a70be0c-a63d-4c9d-9f11-0c3fb085e5fc.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Geliefde liederen van Johannes de Heer (Gezongen en gespeeld door bekende koren en musici)
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 0x9cc6ba9cffa5874840ba87a9d3f86459a6cbbf164e53dfc0da2c69d336667024. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLL6R1700866 — a six-check JSON result.