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 0xb5b656113a9e937f47eb51e1348354a8f2790d8e2fd7952d98c1ba2bb4575e4f. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec908f8a-91ba-4b87-8a06-8078f3896660.json and https://artists.proofprofile.net/proofs/artist/ec908f8a-91ba-4b87-8a06-8078f3896660.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xc4da70652f32e0c75b18cd44078a43e90e626a640496ed7e2994cd07c3eedbea. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:27Z), 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/GXD7G2385399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bbced8e1797f01936780a8373af95a0b778e7e88adba2f0fa4ebfc044a34be. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXD7V2379794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046d54995686e5de612358fd76eff6f8c37422a93e6d9132e85aa7278a0f6606. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:59:32Z), 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/GXD7V2245395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d794d51ef10d7b288bf818ba83031c337866192ff09e9c780718097895934. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AEA3A2223098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6448e5b00880d626d0558e6117ad9e3df68c2f6083740ac19c13886a36a7bb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/GXD7V2501307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5dff6833e9c22adb46047bf488693b6e9196e7d1bb0d9a717a272b2737dc2b. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:08Z), 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/SGW502531508.