Vacek (feminine Vacková) is a Czech surname, also found in Slovakia. It is derived from the name "Václav" (in Latin, Wenceslaus), being a diminutive or nickname thereof, or denoting "son of Václav". N
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 0x399be31a3f4353031e9cdd34001213a4c5eb2715a8ab06d0a27bb6a703d79008. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af1dc4bd-691c-4adc-a441-74a01e6f4975.json and https://artists.proofprofile.net/proofs/artist/af1dc4bd-691c-4adc-a441-74a01e6f4975.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).