Marek Valášek
type: MusicGroup
description: 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
popularity: 24
followers: 123
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd31ec2653a08465b454b9c4b70fb089e96f662adf0b433a1e3549834cd60c0c9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953408
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953408
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/eb95084c-5b94-4d6b-8f02-433ed1a753fc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/eb95084c-5b94-4d6b-8f02-433ed1a753fc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/eb95084c-5b94-4d6b-8f02-433ed1a753fc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:28:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd31ec2653a08465b454b9c4b70fb089e96f662adf0b433a1e3549834cd60c0c9","name":"Marek Valášek","registered_at":"2026-06-12T12:52:35Z","symbol":"NIM0303449","token_address":"0xeb340443871584b82d3728af2eedb5c4215b0dd8","type":"artist","uuid":"eb95084c-5b94-4d6b-8f02-433ed1a753fc"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: 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).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0xd31ec2653a08465b454b9c4b70fb089e96f662adf0b433a1e3549834cd60c0c9","name":"Marek Valášek","registered_at":"2026-06-12T12:52:35Z","symbol":"NIM0303449","token_address":"0xeb340443871584b82d3728af2eedb5c4215b0dd8","type":"artist","uuid":"eb95084c-5b94-4d6b-8f02-433ed1a753fc"}