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 0x5aee690fd95e400a83d82509f351aa6ac7e0be9fdf748af92e95528e8bea8ac6. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0e2687b-c4e0-4a01-a8a8-93b1736c7367.json and https://artists.proofprofile.net/proofs/artist/b0e2687b-c4e0-4a01-a8a8-93b1736c7367.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 0xa05a8f18bfe05376bd47097a378f657e37f8bf36cf60b8973b17507968ce91b4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/AUSHI1600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d6cffd5e4774b10669a50e2a9d7ce4dac365c9f6d9b8d59d55875713e6f879. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:44:22Z), 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/AUSHI2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc746607cca92e17b0c4b509953550ee2c1d80d40d28f26e437f4c718daeb50. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:18Z), 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/AUSHI2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fe4a54e424346a7b5db10a54feea1cb3be2152b6724b94a8d43ba9a4c44698. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:18Z), 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/AUSHI2000036.