Rob Fruithof
type: MusicGroup
description: Rob Fruithof (4 October 1951 – 25 August 2023) was a Dutch actor and broadcaster. He was best known for presenting Waku Waku, the Dutch version of Animal Crack-Ups. Early years Fruithof studied at
popularity: 12
followers: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x87ffea757a0076255bedcad1f533ae7d10ae64185f21c3dc21669bd6bc9296d1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953626
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953626
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/281e5cbc-2a6c-4315-acb3-4dfdcc6dd307.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/281e5cbc-2a6c-4315-acb3-4dfdcc6dd307.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/281e5cbc-2a6c-4315-acb3-4dfdcc6dd307
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T11:41:45Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x87ffea757a0076255bedcad1f533ae7d10ae64185f21c3dc21669bd6bc9296d1","name":"Rob Fruithof","registered_at":"2026-06-14T08:35:48Z","symbol":"NIM0397521","token_address":"0x8ba8934de40e4f59d939b105b7fb0c782fd6720b","type":"artist","uuid":"281e5cbc-2a6c-4315-acb3-4dfdcc6dd307"}
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 0x87ffea757a0076255bedcad1f533ae7d10ae64185f21c3dc21669bd6bc9296d1. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/281e5cbc-2a6c-4315-acb3-4dfdcc6dd307.json and https://artists.proofprofile.net/proofs/artist/281e5cbc-2a6c-4315-acb3-4dfdcc6dd307.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T11:41:45Z
  text: {"copyright_id":"0x87ffea757a0076255bedcad1f533ae7d10ae64185f21c3dc21669bd6bc9296d1","name":"Rob Fruithof","registered_at":"2026-06-14T08:35:48Z","symbol":"NIM0397521","token_address":"0x8ba8934de40e4f59d939b105b7fb0c782fd6720b","type":"artist","uuid":"281e5cbc-2a6c-4315-acb3-4dfdcc6dd307"}