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 0x2c1ede3b5321f1d51c38cbdb8d7e32f2ecd26fe94673710157c927af03280e16. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d36b3e63-d883-4e05-8370-102b6255da6b.json and https://artists.proofprofile.net/proofs/artist/d36b3e63-d883-4e05-8370-102b6255da6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music of the Russian Imperial Ballet (The Exercices)
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 0x94d337a7041b322eaed2484fca1bad00104a5549422ad5dc4e48aa65c5982efb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZGLM2108790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dfa1c507b9dea048a16f821ff11e240d49a5ed7fd17521b66ceb6428da3843. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZGLM2108791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa1a6760fe72f2aa0755068847c29d3da8333864bbe18c7c69cfd18c26c6fd2. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:27Z), 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/QZGLM2108793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936d1ce28344f212ec1654d39139e8e26455cc10d6cde2b16e8be8b40dc0bcc4. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:32:17Z), 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/QZGLM2108789.