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 0x90ddb6ac5157f9f3d93357ec94885a2b6e29f661fb49294f697042d20ff19536. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfccf0ff-85bf-4c12-bc5b-a681dc89deb6.json and https://artists.proofprofile.net/proofs/artist/cfccf0ff-85bf-4c12-bc5b-a681dc89deb6.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 0xd734ad0574a51733fa2f8e3a24da8a165186b7c89c2cbb4ab9013031b67edc8c. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:00Z), 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/QMEU31915667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17d3c6286066d284d1f75a74c364c3b10f0098cf10c2537fd0d8bb6d5fbdb104. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMEU31915668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9999f75bc9e69b5583831e741cc9622f888304bfdc4b5d57aebbca5a9ff286. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QMEU31915669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f017db386e19299ebc23f57cff4a396ea2c5154cc0756b1475067676c7ce9c9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMEU32314544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb95f5f6f710195ac57d599be45eb29f003c90208ed1b28adbc0daf44eabd1b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMEU32314545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604c8574944ff3867d6f8f76a4012087f27beb79dc025819c8e9d854f3cdb9ab. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:35:19Z), 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/QMEU32314546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x192e76f5c271d2440f4cac0877c1889ebafec40d028c941d4ff03c6c5e13e159. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMEU32314547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7fac9773650492ea3c2a80a625d2ce288013c56d1f7861e174e8b82f185cce. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:31:27Z), 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/QMEU32314549.