Jan van der Crabben
type: MusicGroup
genre: choral
description: Jan van der Crabben (born 1964) is a Belgian baritone singer. Born in 1964 in Genk, Belgium, van der Crabben studied music at the Etterbeek Academy under the direction of Aquiles Delle Vigne and subs
popularity: 36
followers: 109
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x759676de0d6f01f0218cc426821a9aea792cca49a23a1db8e9d72ead28ce6ecb
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9cddd4b2-d746-4c0e-a67c-afff9604e722.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9cddd4b2-d746-4c0e-a67c-afff9604e722.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9cddd4b2-d746-4c0e-a67c-afff9604e722
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x759676de0d6f01f0218cc426821a9aea792cca49a23a1db8e9d72ead28ce6ecb","name":"Jan van der Crabben","registered_at":"2026-06-12T05:36:41Z","symbol":"NIM0202571","token_address":"0x537850c88d671ccaebad5a31d02b736c04e0201d","type":"artist","uuid":"9cddd4b2-d746-4c0e-a67c-afff9604e722"}
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 0x759676de0d6f01f0218cc426821a9aea792cca49a23a1db8e9d72ead28ce6ecb. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cddd4b2-d746-4c0e-a67c-afff9604e722.json and https://artists.proofprofile.net/proofs/artist/9cddd4b2-d746-4c0e-a67c-afff9604e722.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0x759676de0d6f01f0218cc426821a9aea792cca49a23a1db8e9d72ead28ce6ecb","name":"Jan van der Crabben","registered_at":"2026-06-12T05:36:41Z","symbol":"NIM0202571","token_address":"0x537850c88d671ccaebad5a31d02b736c04e0201d","type":"artist","uuid":"9cddd4b2-d746-4c0e-a67c-afff9604e722"}