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 0x7f5cd54d5f460cd3deb1c039620a2efb20996f9b06b4e2a6e306f87d3a8f4708. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0107d10-847c-445c-8d7b-25d35aa8e4c2.json and https://artists.proofprofile.net/proofs/artist/b0107d10-847c-445c-8d7b-25d35aa8e4c2.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 0x18434837ad0f4b528b702bdce5335b9777d310abad6e6f4f04ea7cb47d09e9f7. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZNWV2171164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7173b304f53348449c50382fe098306bd0c49cb3f17c98a75782889aa2b3f4de. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZZ7T2413342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4724a1bc3d85b8975a86512f1a2ef7d8858446bbfd9dcce530f8d1418471da60. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZZ7T2413380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f69c02da207f8f495fbb588a483c43d6cab71ab412e76a62bbf2ed3e5b8dfa. 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/QZZ7T2413330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfdbb9af25afd61479b1375c9bbaf5e95966972f5d6dbff1aa22e67f4db9d0b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:52:54Z), 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/QZZ7X2556984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d09d3b68f41b6645a3b3f4a81f9d44ca8194d0cba8925b335989fb195496876. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:22:01Z), 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/QZZ7X2557205.