thumb|Lorenzo Ferrero Lorenzo Ferrero (; born 1951) is an Italian composer, librettist, author, and book editor. He started composing at an early age and has written over a hundred compositions thus
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 0xf3f81475a5856e45226424fcdc10e65f7a7c56c99995342357b04510c0959f1a. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f63fb50-8c34-4a71-a91f-a7bc0391f6d6.json and https://artists.proofprofile.net/proofs/artist/6f63fb50-8c34-4a71-a91f-a7bc0391f6d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).