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 0xdf129d3d5b33d7189be45472addac080584101918fd4b887846b5e05ccc9ac16. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de38cd70-2973-47e3-a098-292a1fad4df8.json and https://artists.proofprofile.net/proofs/artist/de38cd70-2973-47e3-a098-292a1fad4df8.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 0xf267ee586e324f16d73dbb33dabaa34052bdbfa1e08bf9c1e99ba06633f52354. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:19:35Z), 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/QZFZ42465696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9021aed5e352dc5f7a65f4bb105eaf5b76c96d3678fd1b2c85c64f840a965efa. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:59Z), 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/USHM82482030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a83b498b2cd7e1c02e6507a7b5c951a9fec465dc72dd81ad5e187aae64a814c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:42Z), 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/USL4R2441931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7a2d4701916dcd016b0088de6911981483813a6dadfa06c0fad00dabf073e5. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USX9P2400415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc551927ba8c862d4a3f2ab43b1e7155b79d5563ce4c55d484fd191a1ff09598. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:30:41Z), 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/USY242486318.