Tusar is a surname. Notable people with the surname include: Lysanne Tusar, Canadian businesswoman Vlastimil Tusar (1880–1924), Czech journalist
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 0xf301f6d08322ae67bc1bc69447a9ad5deb5b4615ab756f4a6e05674aa3a89fae. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/149d420a-e748-4c1b-8b72-f4a60558a387.json and https://artists.proofprofile.net/proofs/artist/149d420a-e748-4c1b-8b72-f4a60558a387.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).