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 0xfba94c178b5458f017210913d831f7f21d3d0a1d56abd2a03554c343b03acf79. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48b863bc-c00d-45ab-ba94-795ccd077d46.json and https://artists.proofprofile.net/proofs/artist/48b863bc-c00d-45ab-ba94-795ccd077d46.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 0xca13083668cb5c89a63e8d906908b8ef85f2c1c91b44151f179c665432eb5dd2. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZTBC2435056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1555c68f664729d69d91dd222d910f56be5b8a2200b1dab6685eaf49ab700a85. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:46:54Z), 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/QZZ7U2421060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba58b9c93c84a4680285ea93f47705fefe84dc74bd9fedbcf99d03e428620e10. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/QZFYX2503899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe399b02d1ee09e7bd03f84356aa9a5cce2ba40d939071c6d1f208d31facaf5be. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFZ62597693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63e6c1b8de8948890eb19eb827e7453d2a354b697204db2c2f545ab83544895. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:26Z), 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/QZDA82553503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8920d4151941c5c7f4e7abcc52f08ace7ed71bd566793f3cc406b22e90c0f3. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:48:37Z), 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/QZNWQ2597331.