Geert Chatrou
type: MusicGroup
description: Geert Chatrou is a professional whistler from the Netherlands. Early life Chatrou was born in Sint Odiliënberg in 1969. He started whistling at the age of four inspired by his father who used to whis
popularity: 8
followers: 666
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3afc885a1e336965cb21d2652d9a3531c2091bf7bad728e41ad3d8d09b146090
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954038
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954038
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3e1aa17e-a007-49b8-88c5-6320d7ae6e78.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3e1aa17e-a007-49b8-88c5-6320d7ae6e78.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3e1aa17e-a007-49b8-88c5-6320d7ae6e78
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T02:57:22Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3afc885a1e336965cb21d2652d9a3531c2091bf7bad728e41ad3d8d09b146090","name":"Geert Chatrou","registered_at":"2026-06-16T11:11:59Z","symbol":"NIM1033829","token_address":"0x50b4d039c14656355804a373d2701f683f97f841","type":"artist","uuid":"3e1aa17e-a007-49b8-88c5-6320d7ae6e78"}
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 0x3afc885a1e336965cb21d2652d9a3531c2091bf7bad728e41ad3d8d09b146090. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e1aa17e-a007-49b8-88c5-6320d7ae6e78.json and https://artists.proofprofile.net/proofs/artist/3e1aa17e-a007-49b8-88c5-6320d7ae6e78.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x3afc885a1e336965cb21d2652d9a3531c2091bf7bad728e41ad3d8d09b146090","name":"Geert Chatrou","registered_at":"2026-06-16T11:11:59Z","symbol":"NIM1033829","token_address":"0x50b4d039c14656355804a373d2701f683f97f841","type":"artist","uuid":"3e1aa17e-a007-49b8-88c5-6320d7ae6e78"}
album: Ornithology
  type: MusicAlbum
  date published: 2009-01-20
album: Ik Kan Blijven Kijken
  type: MusicAlbum
  date published: 2016-12-19