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 0x2a95b41baa2ae1fdbcef3019f4858df01ef533ff5ad786ec258588276a7603d8. 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/7cff5aa8-26a0-46bc-9f33-1d428e33a68d.json and https://artists.proofprofile.net/proofs/artist/7cff5aa8-26a0-46bc-9f33-1d428e33a68d.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 0xb1ee18e410c6eb0bf1a24db4e0f379f2b6173ee3df55c75f551f3667241f8a09. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QZK6L2030186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45e0738e5207c4f6f4f45aa8e14b36396efeaedb4040e4eb997f0714984a592. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMDA62278072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bcf0882967a13f462a1da2d53dbfddf82b48b93472e6138427dbc36d5405ac. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/THSOH2406119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054651703fef39206d28a212f1e7ffafe4015b6168c83789e9935c88d36b9901. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QMFME2441669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054651703fef39206d28a212f1e7ffafe4015b6168c83789e9935c88d36b9901. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMFME2441669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8699b248ca234206af04f375e445f421cc6a01d3f04016123f6572e24738cd. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:57:27Z), 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/VNA2F2403164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022ccec75a089ac5b254803301da3c9ac1b8d8794d388ef4998aa02a4c84b342. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:03:00Z), 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/VNA2F2500155.