Hans Leenders
type: MusicGroup
popularity: 3
followers: 166
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x85242038b678e1aa79a2532785c2251a9d339c18f1ba2592cdce92ea3b2790fc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5d70fa9a-bcb0-4543-a97e-14074a65f0f8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5d70fa9a-bcb0-4543-a97e-14074a65f0f8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5d70fa9a-bcb0-4543-a97e-14074a65f0f8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x85242038b678e1aa79a2532785c2251a9d339c18f1ba2592cdce92ea3b2790fc","name":"Hans Leenders","registered_at":"2026-06-16T22:09:03Z","symbol":"NIM1190599","token_address":"0xae57408aa6e4f66effba409d25c01b95dfc79d4d","type":"artist","uuid":"5d70fa9a-bcb0-4543-a97e-14074a65f0f8"}
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 0x85242038b678e1aa79a2532785c2251a9d339c18f1ba2592cdce92ea3b2790fc. 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/5d70fa9a-bcb0-4543-a97e-14074a65f0f8.json and https://artists.proofprofile.net/proofs/artist/5d70fa9a-bcb0-4543-a97e-14074a65f0f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x85242038b678e1aa79a2532785c2251a9d339c18f1ba2592cdce92ea3b2790fc","name":"Hans Leenders","registered_at":"2026-06-16T22:09:03Z","symbol":"NIM1190599","token_address":"0xae57408aa6e4f66effba409d25c01b95dfc79d4d","type":"artist","uuid":"5d70fa9a-bcb0-4543-a97e-14074a65f0f8"}
album: Onze Lieve Vrouwe - Basiliek, Maastricht
  type: MusicAlbum
  date published: 2005
album: Classical Church Organ, Volume 1
  type: MusicAlbum
  date published: 2005
album: Double Portrait
  type: MusicAlbum
  date published: 2007
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  type: MusicAlbum
  date published: 2007
album: Maastricht, Netherlands (O.L.V. Baseliek)
  type: MusicAlbum
  date published: 2010
album: Classical Church Organ, Volume 9
  type: MusicAlbum
  date published: 2010
album: Latijnse Sferen (Franssen-orgel Munsterkerk, Roermond)
  type: MusicAlbum
  date published: 2016-03-01
album: Missa in Simplicitate
  type: MusicAlbum
  date published: 2021-03-17
album: Hans Leenders, A Musical Portrait
  type: MusicAlbum
  date published: 2022-11-16