Tomáš Procházka (born 14 April 1981) is a professional Czech football player who currently plays for SK Kladno. He was club captain for Viktoria Žižkov in the 2010–11 season. References External lin
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 0x5a1ede19df01ccd0457221200e1d92393577f68e3516cdd4347af36c428dfddf. 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/ef678df2-e25c-4079-b9c5-87b2665db025.json and https://artists.proofprofile.net/proofs/artist/ef678df2-e25c-4079-b9c5-87b2665db025.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).