Vazul, or Vászoly, (before 997–1031 or 1032) was a member of the House of Árpád, a grandson of Taksony, Grand Prince of the Hungarians. The only other certain information about his life is that he was
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 0xe378e6a878a2c253bb96e3adde4adde4dbe316c41fa5c20dee66d67cb436fc00. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f86dda79-a22a-4b90-a90d-d78211d2230b.json and https://artists.proofprofile.net/proofs/artist/f86dda79-a22a-4b90-a90d-d78211d2230b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).