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 0x9ef397204d68cb274ce7d14b68045932d6438e6f7ff7c1107e4432d5dc7c4ca0. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da3f6d03-81cf-49ad-8d5b-ee8d3ffd0360.json and https://artists.proofprofile.net/proofs/artist/da3f6d03-81cf-49ad-8d5b-ee8d3ffd0360.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 0x8b270b0b4a79c82f7c6c91a165a5aa4247fc473334c18d1a26103f62be48ef31. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:39:37Z), 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/JP92N2251886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb995ac9dc6d91a03668aee8d1e68ef8fa51fc338a74e8c1095cbd633eb4d8b6. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:55:50Z), 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/JP92N2251880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2b32dbdc70b97527d78bdc5d5893d23483bde9c2cc422a8d09d3a46e9398f6. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JP92N2255187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693bc1e2b8661f55df311e3b38572fb01573477a7c052c12176f588aafb37072. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/JP92N2352188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c525159f73d1c618d092563a7151aa76b483a079dcfab30d8883ad573b4be0e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/JP92N2360055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869d05cc64f775428a86d2c0fcd63c9938fa564491b93696d6fd1770b2a78eed. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:00:38Z), 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/JP92N2402700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edf3161597129b17773eba68be358b7352fbd4eb404bebb9296bae4bd064539. 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/JP92N2441117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a19eb72727daee2b1ecfaa539ff0288b70bace871d5e04aebb0f3f688ddedb6. 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/JP92N2507021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dd21bc9cd11a19685179a7ff3911193e0fcd3c5394582633c33cc38530ba76. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JP92N2523827.