Eric Allen Johnston (December 21, 1896 – August 22, 1963) was a business owner, president of the United States Chamber of Commerce, a Republican Party activist, president of the Motion Picture Associa
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 0xf3fce85a65af03e5ef1bad098b7f5bdbcaab6e3533afdcec5ebd8e1e189742dc. Chain 2 (Bitcoin): anchored in block 953985 (2026-06-16T18:03:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dc1d9d0-517b-4e0b-9433-5f92972c3ea0.json and https://artists.proofprofile.net/proofs/artist/2dc1d9d0-517b-4e0b-9433-5f92972c3ea0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).