Antonio Pompa-Baldi (born December 1, 1974) is an Italian-American pianist. The first prize winner in the 1999 Cleveland International Piano Competition and silver medalist of the 2001 Van Cliburn Int
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 0xa6517a3bed43bb8f90f260424d3aad29cbc0fb01238f3069b57a279a9d1d225e. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93d0f6eb-bf0c-4739-aeb6-049b19dfc560.json and https://artists.proofprofile.net/proofs/artist/93d0f6eb-bf0c-4739-aeb6-049b19dfc560.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Haydn: Keyboard Concerto in F Major, Hob. XVIII:6 – Hummel: Concerto for Violin & Piano, Op. 17