Ralf Mackenbach
type: MusicGroup
genre: children's music
description: Ralf Johannes Josephus Mackenbach (born 4 October 1995) is a Dutch plasma physicist, artist and former child singer, best known for winning the Junior Eurovision Song Contest 2009 with the song "Click
popularity: 5
followers: 1910
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x00a419efc4e8239bb3c361ca1ccffe68123f4133cd0437d91343ecf44f2126cd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b9116d57-5f9b-4bcc-be59-7f9938fe2cff.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b9116d57-5f9b-4bcc-be59-7f9938fe2cff.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b9116d57-5f9b-4bcc-be59-7f9938fe2cff
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x00a419efc4e8239bb3c361ca1ccffe68123f4133cd0437d91343ecf44f2126cd","name":"Ralf Mackenbach","registered_at":"2026-06-20T16:11:00Z","symbol":"NIM1651381","token_address":"0x10557f668501ec17962e595d0a2f8cb37e693802","type":"artist","uuid":"b9116d57-5f9b-4bcc-be59-7f9938fe2cff"}
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 0x00a419efc4e8239bb3c361ca1ccffe68123f4133cd0437d91343ecf44f2126cd. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b9116d57-5f9b-4bcc-be59-7f9938fe2cff.json and https://artists.proofprofile.net/proofs/artist/b9116d57-5f9b-4bcc-be59-7f9938fe2cff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0x00a419efc4e8239bb3c361ca1ccffe68123f4133cd0437d91343ecf44f2126cd","name":"Ralf Mackenbach","registered_at":"2026-06-20T16:11:00Z","symbol":"NIM1651381","token_address":"0x10557f668501ec17962e595d0a2f8cb37e693802","type":"artist","uuid":"b9116d57-5f9b-4bcc-be59-7f9938fe2cff"}
album: This Is Our Party
  type: MusicAlbum
  date published: 2012-10-12
album: Seventeen
  type: MusicAlbum
  date published: 2012-10-31
album: We're Taking Off
  type: MusicAlbum
  date published: 2013-02-15
album: Disco Dude
  type: MusicAlbum
  date published: 2013-09-06
album: Vandaag
  type: MusicAlbum
  date published: 2014-01-08
album: Over You
  type: MusicAlbum
  date published: 2014-04-18
album: Ik Wil Avontuur (Titelsong Van De Avonturen Van Arthur)
  type: MusicAlbum
  date published: 2014-09-19
album: Who Do You Think You Are
  type: MusicAlbum
  date published: 2015-04-17
album: Replay (Titelsong van de Bioscoopfilm Code M)
  type: MusicAlbum
  date published: 2015-05-08