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 0x7dc1e6ffbbb1dab07436e84d2d442e7879c2bf7e9ad897333c67901681a95c67. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfa4a923-1264-4aea-925e-230ddd90744f.json and https://artists.proofprofile.net/proofs/artist/cfa4a923-1264-4aea-925e-230ddd90744f.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 0x42e95e4e281e7853627cd67774718f44f94da4e3793630e76438133d72fa07fa. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:11Z), 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/QZFYZ1980966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03f4d5655e852687b3c92f90de466e749ff0a053f91562759893ac6d57bac73. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:25Z), 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/QZFYZ1980967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340368bbd8b8908e354ab0895480da67d4098b86019882da40936e5098844d72. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:24Z), 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/QZFYZ1980968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8034671ce833ab38a81245c364c729bee65afed4937f8233035c4d0858bcfc61. 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/QZFYZ1980970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d5c51ff5a13801b441c3f64848bfc8c9b50e70e3b567e8883b916de56bbf6d. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZK6L2256046.