David Ogilvy may refer to: David Ogilvy (businessman) (1911–1999), British advertising executive David Ogilvy (cricketer) (1859–1917), Australian cricketer David Ogilvy, 3rd Earl of Airlie (died 1717
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 0x97a531d059099f45956a2f42b10b7b7e35b2e5ce829ed364f6cb844241272ebc. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5cd62f7-f09b-4a6a-9df3-d21c975fdbae.json and https://artists.proofprofile.net/proofs/artist/b5cd62f7-f09b-4a6a-9df3-d21c975fdbae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).