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 0xd5b16d4f2fc48bbdaecda1d41be34c144513d7f476b9acff28648ccfc7f99937. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4344652-2356-45e8-a160-c341675b08c7.json and https://artists.proofprofile.net/proofs/artist/a4344652-2356-45e8-a160-c341675b08c7.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 0xbae212340f6d7720f7ffb761484231ede2c8357d0e1106bcf6aaccb1f3c1674c. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FR10S2097109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9f4b56156a0ba3b406f76e8fbdee9233da3e5f2cd22c7ce8ff079b15d812bd. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FR59R2294602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374765e943300b87e8284fec7443e7e7f02089c8fe23934b1132691a068f9eeb. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR10S2385353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a3ce7eabe498c01f0e7addd54d1a0a6e8730129c8e02984078a668582166f6. 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/DGA0M2340197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f012d7edf95eb12c8b89d059d843d88a0fb3bc12fd1310529a7909f4ede0a1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QMDA72455294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218cbb73c2a6705fe4dfddb6323283a54bd83687995689f760f9d5150754d3e8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QM4TW2500598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd112ec45af342e049fcd168a8fd29e17a1266b32256b92ebc9a4128a1ad324. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:22:50Z), 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/QM6MZ2584669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2814dab1735e90ba686167ea662044c936c502cfd0ebc1a01bdc2392c061f0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:23:58Z), 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/QM6MZ2584684.