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 0x427a726b81cf5c7f5dc710506f2618c117c7019b90ea1e3319ba18094b6a5912. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e823504-e5b6-4015-8556-8bc7a365c732.json and https://artists.proofprofile.net/proofs/artist/6e823504-e5b6-4015-8556-8bc7a365c732.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 0xb6007742bdf72de233b91c303054cc12a0a918e221783e61f5babcd566324427. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:49:13Z), 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/ES64E2307046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adfcd964d8ddc6ff2893fcfe0d7bc4f3d4e9634113d3ead7f0c8530439e4fa6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:17Z), 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/US83Z2493114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ff6fa56fb7476ad35a8eab718a38cc02e35b4c37850f556b9d1798cb8ffe8a. 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/US83Z2424223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2777253deca998abf30e33e36bd5a859c6796847c9e8cebba0e2e8470cfc2a00. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:03:31Z), 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/US83Z2424224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55a8d432e25b69a96a02f7d70ba62b5aa0f36072550b9a34e8f3504c9fd77e9. 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/US83Z2424226.