Fritz Karl (born 21 December 1967) is an Austrian film, television and stage actor born in Gmunden, Upper Austria. He is one of the busiest Austrian actors. Private life Karl lives in both Munich and
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 0xa4b35b28aed13aabb4fd71889a883b0c316b12016655e143ea41333a70f285f5. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4d10605-22c3-4fac-a5ba-78a8e60fd007.json and https://artists.proofprofile.net/proofs/artist/c4d10605-22c3-4fac-a5ba-78a8e60fd007.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).