Petr Linhart
type: MusicGroup
genre: folk
description: Petr Linhart (born 29 May 1990) is a Czech handball player. He plays for Fenix Toulouse and the Czech national team. He participated at the 2015 World Men's Handball Championship in Qatar. References
popularity: 5
followers: 468
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4e5be4ecf540f398136ba7a5550674122cb49485a4d2c7d759f533683bc40b35
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7370d0e-530d-44ab-8067-3641d1d21ace.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7370d0e-530d-44ab-8067-3641d1d21ace.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e7370d0e-530d-44ab-8067-3641d1d21ace
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4e5be4ecf540f398136ba7a5550674122cb49485a4d2c7d759f533683bc40b35","name":"Petr Linhart","registered_at":"2026-06-21T09:22:03Z","symbol":"NIM1887221","token_address":"0xfd2969963692d288132cea4ca01316dea84a91a1","type":"artist","uuid":"e7370d0e-530d-44ab-8067-3641d1d21ace"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5be4ecf540f398136ba7a5550674122cb49485a4d2c7d759f533683bc40b35. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7370d0e-530d-44ab-8067-3641d1d21ace.json and https://artists.proofprofile.net/proofs/artist/e7370d0e-530d-44ab-8067-3641d1d21ace.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0x4e5be4ecf540f398136ba7a5550674122cb49485a4d2c7d759f533683bc40b35","name":"Petr Linhart","registered_at":"2026-06-21T09:22:03Z","symbol":"NIM1887221","token_address":"0xfd2969963692d288132cea4ca01316dea84a91a1","type":"artist","uuid":"e7370d0e-530d-44ab-8067-3641d1d21ace"}
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