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 0xc0523c4c89a245038b34902c2f853e1079e0888406c917b2c50d4adbdff5aacb. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b91b977-c59e-4e51-8d13-15022a51f1d4.json and https://artists.proofprofile.net/proofs/artist/8b91b977-c59e-4e51-8d13-15022a51f1d4.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 0xcdae3f852feebaf43d90aced5d4a6d05d75bdaefc52c56d341b4868cae6f97a2. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:06:38Z), 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/GBKQU1729950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3491773ea3a801c489967ef63b40b3a89095b56d5563de915f78f0e5f12daa. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:44Z), 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/NLCK41051354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac38c7cf7fd956f0c65d54ab0ea21fd04bfc93eb4b6f4e03b2620cced0ce37. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:47:20Z), 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/NLCK41051355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34f214f265a284d4c07d84295d868bf05138ce65cd306345c25237764699d42. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLCK41051356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b844782793f338a84d315e5b5fbc6a926d9b6d4576f33d77cf96c4b0b92b5b6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLCK41064377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe483dd761eca0dd9e074fbeed73d86a7b9dcd322a18ba6d1f07138922304fc43. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLCK41071931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582727215ffdfbe6193fdaf98ca5d35415d898735511bdd55645b656b260654f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:09:47Z), 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/NLCK42211909.