Marek Valášek (born 12 June 1973) is a Slovak sailor. He competed in the Finn event at the 1996 Summer Olympics. References External links Category:1973 births Category:Living people Category:Slo
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 0xd31ec2653a08465b454b9c4b70fb089e96f662adf0b433a1e3549834cd60c0c9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb95084c-5b94-4d6b-8f02-433ed1a753fc.json and https://artists.proofprofile.net/proofs/artist/eb95084c-5b94-4d6b-8f02-433ed1a753fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).