Dino Dondi (10 July 1925 – 3 March 2007) was an Italian operatic baritone. Life Like many Bolognese, Dondi had a passion for opera and after studying singing as an autodidact, he met a master who r
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 0xa45903571457ec9f879af9f91a17124a06807a726e93b7c97a105c740c3f2a87. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/44acdb7f-7004-4bb1-89a2-f2c631655612.json and https://artists.proofprofile.net/proofs/artist/44acdb7f-7004-4bb1-89a2-f2c631655612.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).