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 0x4e7aa6b1c9ff967c865b617f0bd06710f7d328e266a9e71f5690a4d776701821. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34b55ffe-ba49-4c6a-ba38-8f0feedbc4d4.json and https://artists.proofprofile.net/proofs/artist/34b55ffe-ba49-4c6a-ba38-8f0feedbc4d4.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 0xf0ece66c3066c84082bc7647e96b7ba98fd9ab000eb2896a7e8f32a897652ccd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCACO1697663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aaedfd3a427f29a016e78b45a38efb24a30c4f7171aa453f8fcecfc2afaa6c. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/TCADC1755118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48a243b37cc0f776062803b67e53bfadb49054684f9017eb2a394ac876d0116. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:15:44Z), 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/TCAES2029686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553666cd715115da82af62ec5b31e0aef02bfbb65da9881f7af283c5d38a7e6b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFK2382805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb834d31f575f185c47f9926cc8f595989a0f1ea16e583e8874b3f0083a8ad82. Chain 2 (Bitcoin): anchored in block 957527 (2026-07-11T06:08:55Z), 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/QZDA62470218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb4a9bedc3fb68aeade0e3c980b27a59fc9cd5cce45d0d50c6c3ca6917bd608. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:11:33Z), 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/QZHNA2431585.