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 0xd2cbb02866b7a152254f74449ddf8a3cd1b631ebf5e0cdb467beccc562dc5941. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04bb9335-63f2-45f2-8010-b0d8c43008ec.json and https://artists.proofprofile.net/proofs/artist/04bb9335-63f2-45f2-8010-b0d8c43008ec.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 0x1f3e61b1f30089349ccdddf68d73944395322ce289a97e6c95f95ee6bce0fdaf. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TRBDY2130202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff1fefc9f712a8dfe915a926543a625dce02ed19c39013bbd34a5b646e666fb. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:54:51Z), 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/TR0532215052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53235a3d2fcae0d76267e1ae81d1e94a1ac51f34d05e3554ac56e5702e23e8b5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TR0532315488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4c1bf9e10948167b3d8f68ab89c2308b6f02a9c7bc679545b442ad320e4a67. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:41:46Z), 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/TRCAE2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6383f5d073f58ce73a1c8446ed5b364493dfd759f4d29114362c3acd88fb5e41. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TRCAE2400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82334c3c132a5f888a2b1467e6748d64b3ba50bde7caf31cd9fffb3ccc3a02d4. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/TRCAE2400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5263ad36e926a29d477f3d86c661c38431d1dff7b5458c7fa64c57525e3fdb. 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/TRCAE2400136.