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 0x7c4cf3f206d89514c8cc8edb67ecfcfd70c02d6d2bffe37f9d97951abb3053c0. 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/bc34d8b3-60d2-44dd-824c-0b27011dd7e0.json and https://artists.proofprofile.net/proofs/artist/bc34d8b3-60d2-44dd-824c-0b27011dd7e0.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 0xc354a53e43a5e4bb76dd22fd4e397bad7b3d2b5c10ddf5632bb47475b65dc064. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:01:29Z), 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/QZK6L2182763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81b30aacf11174917f60213fe67d89d2a2f4b26edfb15ec566c48e452ea6727. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:40:41Z), 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/QZK6L2180420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b96e4788196b5a5915bdd280133eb0ef9b8dd0acba047cbd7795ae2955fb10. 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/QZK6L2180427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4ead3d3825396b5d625276aa055d7f703eff281c870dab8350f25baedfa914. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:57:18Z), 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/QZK6L2178493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be8283289959d12f7b86de12d85bc67ff78a4be3b33eeca13013c81197e1e83. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6L2178496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5633d2df4da216095ff16f90871630937ff48a3cbc8363cdee34d6cd3c034d11. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:50:56Z), 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/QZK6L2182815.