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 0x6df886fbf593b97840d87fd2df8e3c44cf85d8dcbbc26c228e357e888d625550. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f5c4edc-7bb0-4292-963f-3acbf3cc4e7e.json and https://artists.proofprofile.net/proofs/artist/8f5c4edc-7bb0-4292-963f-3acbf3cc4e7e.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 0xcbcf9aa5af7e136499a7f460492e5af1f9595b2e1e60703068b77a56f2151037. 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/CAW118700500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bb5ead16f947491c07efa28064b0926213df0df84da05370ce36183ccdeb62. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CAW118700501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ea04566340a1cea769b8454565dc53509d90e9d7c766ee647b47f84116936f. 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/CAW118700502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcf9396bd54ca138936c241bf8f8ead8bd7fe3d0eb2a6f941a0796d0cf8e414. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:58:23Z), 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/CAW118700503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bc236c29d88c837fedd57abb31209df4191cf02450d5545502b4218b235b37. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:45:25Z), 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/CAAAF2011016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e7ab54f3df8547389d78ca1fd04bc27c67ce9fcc7111314eaaff5857bfeeda. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/CAW111300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe007ce5902209d9457175bbe163292a320dd79d21c0f9e7cb9c033aa7a9f9d55. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CAW111300351.