Dave Ewing (10 May 1929 – July 1999) was a Scottish footballer who played in the centre half position for Manchester City and Crewe Alexandra, and briefly managed Hibernian. Career Ewing was born in
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 0x1f03d68bcd90cc70d01cb621c458e45f50f56c1ddb7cc604c355c7ce44ef88a7. Chain 2 (Bitcoin): anchored in block 954124 (2026-06-17T18:22:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b6efd2e-c006-4bd1-b411-0ad8c8052f18.json and https://artists.proofprofile.net/proofs/artist/7b6efd2e-c006-4bd1-b411-0ad8c8052f18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).