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 0xc50bceeb8c8615119de7094c295e10b8a4e3e20e92d75b79a3427870f6671172. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2fa3d92c-5384-4040-bcaa-c122abf8bbc0.json and https://artists.proofprofile.net/proofs/artist/2fa3d92c-5384-4040-bcaa-c122abf8bbc0.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 0x768aa4bb47f0aa55de3ca7016e0733b9fd6214a882969a29bf20259da7b20579. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYZ2236276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edde5e86278fde35de915137452d19ec7ddebd4301e1d656211331f19bb6c73. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:48:51Z), 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/QZFYZ2236278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad606252bd8ffe5a0342477e9452ee88b601ca00f4b3902db6bdfc17548663. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFYZ2236279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2ad0d95739f3b93d9a97e0b5a82f346bd97f1fedcc776e03b8f73dab4718f4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFYZ2236280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cb6ec7bfe2d5e9485e203f020b64c4731eb550a37edfc57c96c1744c22271c. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZFZ32237704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84b7a6363891abca2ce2d0b8e00f12baf346a06695cdbb1cbc3f5c76b63b718. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:36Z), 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/QZES82270650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdeb6e2669166ac55aea03e2568ecfa0a1cd0c444d2a939ee4a5b07dbcb32f87. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZK6P2225819.