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 0xd8c14a2249a8da56935b1302ec4f0dfd44d5b1417128e938986a9bb6fd4efd3f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/495850c8-9fbb-4665-9d45-3d3e26299dd7.json and https://artists.proofprofile.net/proofs/artist/495850c8-9fbb-4665-9d45-3d3e26299dd7.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 0x474c0f209d3c2bdb89ddb6bbfeeccd969178afbaf16539d6759d4e9f2d9307cf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:07:51Z), 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/FRD0K2200810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2001626a056a112c897ca23743d8944d4dd03df1f77d6c7c41b0ecac8b39d9b. 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/FRD0K2200820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d131aab8386fa1001c42879472a7a75eb7441702935983152345dd94f5fbe4. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/FRD0K2200830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd749100e0ad395fb6f01beb99e096ad5070240ca3d5dbe76f65c08f583ee8fce. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRD0K2200840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3948a0d162e76dd6c81340778526b086cd5a4b93fafa832ba90b4f7ef0cf2eaf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:49:22Z), 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/FRD0K2200850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c92138011c85b051ed35edd63c98f1669938249c3d97f1e9ba804168598ff9f. 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/FRD0K2302170.