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 0xf21479e4fa3096b36dcfafed77ddd3de69adccfcbb0949c8f44c0c402dcfad58. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7157172-857f-4a28-8056-a8bcf4abd535.json and https://artists.proofprofile.net/proofs/artist/c7157172-857f-4a28-8056-a8bcf4abd535.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 0x7ac6d17da8b3a90d4a9bb680d904cfebb5b418a7362c5c644b2f659106bbffa8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FR59R2201874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa58a2bdbd96c09e18bbe92d3dbed55ebfdd69f16eac7d004ce48b0e2a7fc75. 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/FR10S2231313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da206d81447e6463ce46887cd5dd9953316da1d2f8636876472d570c8d32407. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:44:19Z), 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/FR10S2226704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05bd7100d81cb5308bf48478f8b03184ef8daab06408242fecab1bd9aa6f681. 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/FR10S2226872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b90e5813a4efa14b5205a331e55729810c6d58d699f2858b0db40f39a3944e. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR59R2201875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920439e9e7bc4adceb4d8db2cbf6a9fe87422f914a22c54f9416c27091e440e2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA052247451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8441a690d91d5bf9db6c8e4a24f6bf91f19c95f15c87793deafdf49118ba8c27. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:55:38Z), 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/IDA142315881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3800f9b9f41f36bdf891518e2b0fc65e364d8d727872d5e4b887dfa17c8b0a16. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:18:15Z), 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/IDA142315882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0c5316465f6ddec16ef71c79cc25fec89138927ffc03905cb1b3826d10e81. 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/IDA142315905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c46065c7e78b21cee432657eb581e9b3681fc9c43273f065e88f727353b602. 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/ING212529939.