Ralph Leonard Kirkpatrick (; June 10, 1911April 13, 1984) was an American harpsichordist and musicologist, widely known for his chronological catalog of Domenico Scarlatti's keyboard sonatas as well a
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2433d9257e96af647f4e194f18531eb1d079f415b20eb447040a89e7bcf85467. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad6f633a-78fd-4a98-bf0e-b7cb76f573f3.json and https://artists.proofprofile.net/proofs/artist/ad6f633a-78fd-4a98-bf0e-b7cb76f573f3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Brandenburg Concerto No. 5, Ralph Kirkpatrick vs. Karl Ristenpart (Compare 2 Versions)