John Sant’Ambrogio (born June 12, 1932 in Glen Ridge, New Jersey) is an American cellist. He studied music at Lebanon Valley College (B.A., 1954) and at Ohio University (M.M., 1959). He studied cello
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 0x50331d8376d6bf78c19453a3ae9e12234689a19700eab7a94b50981f07202eb0. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e7e6ddb-dd53-47f2-9869-bb74f24334e7.json and https://artists.proofprofile.net/proofs/artist/0e7e6ddb-dd53-47f2-9869-bb74f24334e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).