Katalin Kiss (born 3 January 1982) is a retired Hungarian rhythmic gymnast. Biography Trained by her sister Adrienn, Katalin made her international debut at the 1997 World Championships in Berlin,
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 0xc283ba9ce2f4616f7f451d33cfc1b00a900bd4e226bba5387469b3193ae796be. 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/ff0a6857-bfe6-424d-9f0e-24727f367ebe.json and https://artists.proofprofile.net/proofs/artist/ff0a6857-bfe6-424d-9f0e-24727f367ebe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Orban / Selmeczi: Contemporary Hungarian Masses