David or Dave Ford may refer to: Arts and entertainment David Ford (actor) (1925–1983), American character actor Terry Harknett (a.k.a. "David Ford", 1936–2019), British novelist David Ford (musician
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 0x33fb35fcf477c6a1b5d452e50e6cc52c4e7a26cccfc245c753ec0e7f2e38899f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d2ce15d-7a65-4773-b4e5-66283d1fa2a7.json and https://artists.proofprofile.net/proofs/artist/6d2ce15d-7a65-4773-b4e5-66283d1fa2a7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).