Jan Kraus may refer to: Jan Kraus (actor) (born 1953), Czech actor and TV host Jan Kraus (footballer) (born 1979), Czech footballer Jan Kraus (wrestler), Czech wrestler Jan Kraus (cyclist) (born
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 0x0040f2eab0965f3f4c8139941bfe6545cf9888d64a373d44910994176055ecde. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5051a165-cfe5-4d8c-9544-3a4117a2ece8.json and https://artists.proofprofile.net/proofs/artist/5051a165-cfe5-4d8c-9544-3a4117a2ece8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).