Freek Vonk
type: MusicGroup
genre: jungle
description: thumb|Freek Vonk (2016) Freek Jacobus Vonk (born 24 February 1983) is a Dutch professor of biology who specializes in herpetology with a special interest in snake venom. He travels the world in search
popularity: 12
followers: 6204
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9314973700dd429a165600883c45233064777c82b48838d3a7dc86d57731b341
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953625
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953625
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2e4b3a21-a03a-4c58-836e-11abd729d9aa.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2e4b3a21-a03a-4c58-836e-11abd729d9aa.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2e4b3a21-a03a-4c58-836e-11abd729d9aa
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T11:37:06Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9314973700dd429a165600883c45233064777c82b48838d3a7dc86d57731b341","name":"Freek Vonk","registered_at":"2026-06-14T09:15:58Z","symbol":"NIM0407094","token_address":"0xd24e490a48c235dbd583310ebe3412c3a6e68967","type":"artist","uuid":"2e4b3a21-a03a-4c58-836e-11abd729d9aa"}
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 0x9314973700dd429a165600883c45233064777c82b48838d3a7dc86d57731b341. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e4b3a21-a03a-4c58-836e-11abd729d9aa.json and https://artists.proofprofile.net/proofs/artist/2e4b3a21-a03a-4c58-836e-11abd729d9aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T11:37:06Z
  text: {"copyright_id":"0x9314973700dd429a165600883c45233064777c82b48838d3a7dc86d57731b341","name":"Freek Vonk","registered_at":"2026-06-14T09:15:58Z","symbol":"NIM0407094","token_address":"0xd24e490a48c235dbd583310ebe3412c3a6e68967","type":"artist","uuid":"2e4b3a21-a03a-4c58-836e-11abd729d9aa"}
album: In het hol van de leeuw
  type: MusicAlbum
  date published: 2018-10-26