Zły (Polish for evil), was a Polish magazine that was created by Małgorzata Daniszewska, the wife of Jerzy Urban. History and profile Zły was published from 1998 to 2000. The magazine contained real
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 0x8053f16a9740b1a55e83d7991ef1a00f6255f3025a92eee14be28c91b7d092c9. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8b0b997-e642-452f-8809-04afd3440bb4.json and https://artists.proofprofile.net/proofs/artist/c8b0b997-e642-452f-8809-04afd3440bb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).