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 0x8e5d2598f824db2e2e507c45e6dc2ef8fff97090ec3ceeda9f84408d0c17bd79. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/415a429a-6789-454d-8735-87a0a4fc70a5.json and https://artists.proofprofile.net/proofs/artist/415a429a-6789-454d-8735-87a0a4fc70a5.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 0xfc0e90deb84ff25e1e3f72085f314532b2a9c9d2fa9407c3ef0330398e58ea6a. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FRX281530648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6063e26b13776ebc484370c0670edc64b9d364a0f91652bbfc288c06fdecb45c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/FRX281530649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb191e842dc2ab246562ae2e9a58e76f32c2ff3e339f9c2322b236fc379c24fa4. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/FRX281530652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c6e9718c0d2464f5f7776705c4aaab4f1c47e691c3793456f0bed34babb3b6. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/FRX281530658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8707d38a12849b03121f9559162a75d7eaf22f32951fbed97054ca4d511a78c8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FRX281530659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f521efd5c31dedcd81db453f8757d80b0490e94687f35d33fed2b9d92deb8a. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:02:59Z), 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/FRX281530661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83933560f642bc54314c251517927b08f78f281e8778c2b6eb38a698cdabcbac. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX281530666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5925cfa49ab0f5681c29e1d793b9adceafe717fdcec0f4261b4ec2851d8c0b. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/FRX281530667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2ea926764bfe76cd8ad974a16bddb1a8914e280c2deeabc7cdc36ff152d66ee. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FRX281530668.