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 0xcb4fef0081196763b9b33161a3d928bb5daed2df29aab25d5fd21d2fc7ec5750. 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/6bfa4398-8e83-4183-87c6-8e4f41e632b8.json and https://artists.proofprofile.net/proofs/artist/6bfa4398-8e83-4183-87c6-8e4f41e632b8.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 0xec2d97a0b35edea50efa864de2fb352159a24c59826106cd253b158101347db9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZAAJ2000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07fa4a1e3ace2c411e61c5369618cdeb9f17f684a12effe7f9713cfe8471b42. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:17:01Z), 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/QZAAJ1901117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4783f7a400723aec5d6a115566dc119cf97a09f6279a02192c55d2546278a9. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:47:51Z), 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/QZAAJ1902078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7846c20d1515a7bb3ff983055abdca0e94ef820bd85140b2d82d63a5c3ec706. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZAAJ2000065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7d33b2a624eb9f02d82a21ede371b4073668e9a4acd877d0629bee52adaaf3. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:31:12Z), 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/QZAAJ1902191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d418ee22d5a0e3db099734139c78cdd2501f3ba771b37e7fd42aff76cbb69ca. 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/QZAAJ1902695.