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 0x62b0827383228b95ad2634b5653288fa27cb914f92ed2d7a5d899771dd419518. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5354050e-3915-4b98-b496-54df3d8fab89.json and https://artists.proofprofile.net/proofs/artist/5354050e-3915-4b98-b496-54df3d8fab89.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 0x3cd7dc3e987981eef5dcfc75fe6f3a2625387a4b61edc0082f5e8eac2b1ab625. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM82588582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb7a340faf49a3b210ee1ee7d1c9ffff0a8d24f45f61748422d1b273e7500c6. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USHM82588583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67810e709635af07a1612ab0724c26369bb1fe7082d17ac4e006cb9fd0784865. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:27Z), 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/USHM82588584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6747dcb24c301154fed04fc6b69a876e5d32db064eb747d81af9a2ce623616da. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:50Z), 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/USHM82588585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ede4f56983def76e5b7b62d5261bc42215e41956e8cbece992f83ff08a1761. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USHM82588587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc566d108b0dd55e7399139555f42688bbea165396eb0428d1a138fb8874ace7. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:23Z), 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/USHM82588589.