Karel Kratochvíl (born 8 June 1982) is a Czech footballer currently playing for FK Kolín. External links Category:1982 births Category:Living people Category:Czech men's footballers Category:M
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 0xccd6231a4b08a9c6810c11fe880b6d2668e188684c25f580525c03fe9fd8b2fc. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef47dc38-c6be-4db5-96f1-04b6bb492091.json and https://artists.proofprofile.net/proofs/artist/ef47dc38-c6be-4db5-96f1-04b6bb492091.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).