Robert Anthony Eden, 1st Earl of Avon (12 June 1897 – 14 January 1977), was a British politician and military officer who served as Prime Minister of the United Kingdom and Leader of the Conservative
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 0xd62ca2f1cdf14452d7944a5329f3707bd92e3b04c13d1be0c6ef2f7aaa3037d2. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdd81f70-7a36-4e9b-9a90-23250a896a1c.json and https://artists.proofprofile.net/proofs/artist/fdd81f70-7a36-4e9b-9a90-23250a896a1c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.