Janszoon
type: MusicGroup
description: Janszoon usually abbreviated to Jansz was a Dutch patronym ("son of Jan"). While Janse, Janssens, and especially Jansen and Janssen, are very common surnames derived from this patronym, the form Jansz
popularity: 2
followers: 4
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf75bb85a495e83d15dc7081e23a346756a30ae4fe28cef5284c3441b5f5aba9c
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/c5eb608f-312d-426f-8036-275c74ad1a5c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c5eb608f-312d-426f-8036-275c74ad1a5c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c5eb608f-312d-426f-8036-275c74ad1a5c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T22:44:50Z
additional property: OTSCanonicalRecord
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 0xf75bb85a495e83d15dc7081e23a346756a30ae4fe28cef5284c3441b5f5aba9c. 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/c5eb608f-312d-426f-8036-275c74ad1a5c.json and https://artists.proofprofile.net/proofs/artist/c5eb608f-312d-426f-8036-275c74ad1a5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T22:44:50Z
album: Mindlessly
  type: MusicAlbum
  date published: 2025-01-29
album: Noai
  type: MusicAlbum
  date published: 2025-02-10
album: Orange clouds
  type: MusicAlbum
  date published: 2025-04-12
album: Behind the bulkheads
  type: MusicAlbum
  date published: 2025-11-07