thumb|Clairval in the role of Blondel (opera Richard Cœur-de-Lion) Clairval, real name Jean-Baptiste Guignard, (27 April 1735, Étampes – 1795, Paris) was an 18th-century French operatic singer (tenor
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 0xb4de4f9153039b2dcdf940dbedfa7bc60b07ddee1b494ada5b414750b44d6a29. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30d3fe8c-8ed0-4c25-b688-38c57f8612af.json and https://artists.proofprofile.net/proofs/artist/30d3fe8c-8ed0-4c25-b688-38c57f8612af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
FOMO (Original Motion Picture Soundtrack)
Waar is Elke Wevers Original Series Soundtrack