David Kirkpatrick may refer to: David Kirkpatrick (author) (born 1953), author of The Facebook Effect (2010) David Kirkpatrick (producer) (born 1951), American film producer, studio executive and scr
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 0x014b3ab5c7ba4f819c19caa4d25fae2a16e003255801b3a1bcf965c785513f1f. Chain 2 (Bitcoin): anchored in block 953860 (2026-06-15T23:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0348daea-6814-4ae5-a0d1-09d4ed14dceb.json and https://artists.proofprofile.net/proofs/artist/0348daea-6814-4ae5-a0d1-09d4ed14dceb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).