József Pogány, known in English as John Pepper or Joseph Pogany, (November 8, 1886 – February 8, 1938) was a Hungarian Communist politician. He later served as a functionary in the Communist Internati
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 0xe8b6bbcb5da45fa7fa3d2aa4fa2e24afb2838fa661ddb73d5f80677eb61c8a4a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd1cacb3-56e7-4020-8db8-b8bd24927bb3.json and https://artists.proofprofile.net/proofs/artist/cd1cacb3-56e7-4020-8db8-b8bd24927bb3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).