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 0x998206c6d02e692b00542f1d3bbca5cc6c011cbe622221b35cae58e1f28b9253. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21caff16-0b27-46c5-9b9a-ce5c4febbf39.json and https://artists.proofprofile.net/proofs/artist/21caff16-0b27-46c5-9b9a-ce5c4febbf39.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 0xde984be0a6b3d29df7354cac32184ff34896a7e4929c44c494e52a8a22755aff. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:54:11Z), 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/GBMJG2413032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9979a5c85e1d0b8aa5a549e88c9d5b6a482ee777f624c532eae159068a9546. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:12:11Z), 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/GBMJG2413033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d43494afc1e482bff3d084e4b43c1618111fc209fc60af6b837acc761a2d35. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:00:17Z), 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/GBMJG2413034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68752cb3d0dd56576b699a6b6ab1a0b2b1e586075f4f0b21dcdc24433eb2fab. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBMJG2413035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a37896f8b3ec20370ab2266d05c274293a0a96b56c8fe2ef5366229333aad49. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:23:43Z), 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/GBMJG2413036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9352532e95419ff37355a21a8fa5ddaf4948750021e94d9b6229d843e98ba41. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/GBMJG2413037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b08d27ae6469ce6c3b5715e6a8c69609014f25aa79ddfc4b99827d9a4134443. 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/GBMJG2413038.