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 0x39537065e6993dc4d2673b7fbb87739686ce33b9e66495150e9e8bc7ee2a4b23. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8542c1d-84f4-4f77-a5c7-221f7b33fefa.json and https://artists.proofprofile.net/proofs/artist/e8542c1d-84f4-4f77-a5c7-221f7b33fefa.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 0x0a8f5099b835aa0e67bb3f014d29eca11621bf33dea41873629834bd9a8b324c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:29:47Z), 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/US7VG1832997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333195445f902b020d73edb397126c1745177a20d328779e387838dfcab95268. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:05:23Z), 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/US7VG1832998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a63ca200bf56dc7eda6c9233a5301e93201adb35ded10ec31d83b1be401c15. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/US7VG1832999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3b14c37584ea37f28d2e453764d0a70dc751dbf1ca51555693a276b38162bc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/US7VG1833002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a3fa9c59602681aea7a56d4a951b926b07d7ac6a10df81c509e3f50d0f3af4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US7VG1833003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd6ac13b21e8bc0e8949df6cb6caddb29e0f082649711309c8df8e8af1090d8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:28:00Z), 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/US7VG1833005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0ab13b93e3f90cc61f0637939a47c7b5cd4707737f11f631e7fcbc3105b5b3. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/US7VG1833006.