Pietro Frosini (9 August 1885 – 2 September 1951) professionally known mononymously as Frosini, was an Italian vaudeville performer, musician, and composer. Based in the United States, he was one of t
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 0xdf5979edc4e5cb5b685e8633f37650cdffb78a599ef3ab5ff078ce870e72aa5b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d070201-c903-4575-be87-008dc524247c.json and https://artists.proofprofile.net/proofs/artist/8d070201-c903-4575-be87-008dc524247c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).