Henny Huisman
type: MusicGroup
genre: nederpop
description: thumb|250px|Henny Huisman during TV recordings in the Efteling in 1986 Hendrikus Josephus Huisman (born 18 June 1951) is a Dutch television presenter and musician. Biography Huisman had a catholic u
popularity: 10
followers: 75
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcb72fa92d40def8bc093de5392f77e871cd62f10c5772108b6e2c38d3a3f6e74
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954615
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954615
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c5589494-0bfc-408c-8238-485e8d6cdc86.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c5589494-0bfc-408c-8238-485e8d6cdc86.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c5589494-0bfc-408c-8238-485e8d6cdc86
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcb72fa92d40def8bc093de5392f77e871cd62f10c5772108b6e2c38d3a3f6e74","name":"Henny Huisman","registered_at":"2026-06-20T20:51:24Z","symbol":"NIM1711074","token_address":"0xa3dbf3310b3689e5c701d6c839e5bb6ab8471691","type":"artist","uuid":"c5589494-0bfc-408c-8238-485e8d6cdc86"}
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 0xcb72fa92d40def8bc093de5392f77e871cd62f10c5772108b6e2c38d3a3f6e74. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5589494-0bfc-408c-8238-485e8d6cdc86.json and https://artists.proofprofile.net/proofs/artist/c5589494-0bfc-408c-8238-485e8d6cdc86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
  text: {"copyright_id":"0xcb72fa92d40def8bc093de5392f77e871cd62f10c5772108b6e2c38d3a3f6e74","name":"Henny Huisman","registered_at":"2026-06-20T20:51:24Z","symbol":"NIM1711074","token_address":"0xa3dbf3310b3689e5c701d6c839e5bb6ab8471691","type":"artist","uuid":"c5589494-0bfc-408c-8238-485e8d6cdc86"}