Kirel is an isometric puzzle game written by Siegfried Kurtz for the ZX Spectrum and published by Addictive Games in 1986. "Kirel" must defuse the bombs before they explode while evading monsters whic
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 0x4851b9acfb10e7240db993480f6eb610e401abb020255531680b221eeb30247c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a37e6de3-2c86-4f14-9551-b03a62784f42.json and https://artists.proofprofile.net/proofs/artist/a37e6de3-2c86-4f14-9551-b03a62784f42.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).