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 0xc538495eb6a4cc43bfba81857f2efa7b1f44d3e5a672f4760717c0f80812b356. 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/3426b238-c08e-474e-b7ab-830502ac410a.json and https://artists.proofprofile.net/proofs/artist/3426b238-c08e-474e-b7ab-830502ac410a.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 0xe682d78ceb27b7cb85dd924cf4bcb69a4859e17dcbffb10ddf0f2f88a4fcdb98. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QML6R2203750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648fe34cb0793cc228912c6e0bb16afcc98bfd4155e292911c151bde07ea58de. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QML6R2203751.
Antiphons Ave Maria, Ecce nomen Domini, In illa die, Jucundare, Veni Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe627e52a34213f95427536830d6f4216859b7f6044655887fb403c4394e42624. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:15:55Z), 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/QML6R2203760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad8b568f69f4a277fc015300d8a7ae00199046d2ceb9a6b38681757d1c09609. Chain 2 (Bitcoin): anchored in block 956777 (2026-07-20T11:52:55Z), 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/QML6R2203775.