Eric Sheppard (born 1 October 1950) is a British and American geographer, currently Distinguished Research Professor of Economic geography at UCLA. Background Sheppard grew up in Cambridge, England,
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e5cec01b90d168ed13a00d7d6d5d673857280f5c4b1226b33f8abe7eae800f. Chain 2 (Bitcoin): anchored in block 953978 (2026-06-16T17:11:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2bdf6411-c5e1-4b71-8c79-76b477023e0b.json and https://artists.proofprofile.net/proofs/artist/2bdf6411-c5e1-4b71-8c79-76b477023e0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).