John Patrick Leo (June 16, 1935 – May 9, 2022) was an American writer and journalist. He was noted for authoring columns in the National Catholic Reporter and U.S. News & World Report, as well as for
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 0x26820d9a58d8f27c7c062dd06b9d06694c1ad29da52a2584444d9c03d6c6840f. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b75ee9b6-a213-4744-ad76-6b8a9f626618.json and https://artists.proofprofile.net/proofs/artist/b75ee9b6-a213-4744-ad76-6b8a9f626618.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Happy Hazmats EP (Smile for the Camera! Volume II)