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 0x4baf228a49ea77e2533fbded732294e98b16e36d33163401b2649c34a481f6cb. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdc75bc7-d775-4224-a20a-9a0e2b95f6c7.json and https://artists.proofprofile.net/proofs/artist/fdc75bc7-d775-4224-a20a-9a0e2b95f6c7.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 0x2f873cd08425d5d24ab6748eda30029a2741e26790673f543fa8df312ecb078d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZTBE2570073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2360c04a756dba35a61e8a2eeed5f35b9fd51de19ba18c230b1a796acf60ad. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:31:29Z), 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/QZTBE2570068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c70fb477f169268b68181e395c121705407e453c291a0d5091c332ddcc3adb. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZTBE2570055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1b998825313cee24ac2ea327b5a8b341c7b217b28132e2177ff92e10ba227d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTBE2578218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63cc111091ccaaa94cb1a41fd1bdc6a210ffbaccf4e03f51ba953f5801fd86d. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:25Z), 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/QZTBE2568336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a73501285f2204bffa6b4cd0d74dace6fa1db08f6281d9dd8eeee93b9569187. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:02:50Z), 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/QZTBE2570059.