Harry Kappen
type: MusicGroup
popularity: 2
followers: 109
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9493267f8aa396b7c0ee6c471b443011460125e4f695f89356aef725d0e2880b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954040
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954040
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3dc637f0-6904-4774-bd3f-5e02e4b4cf7d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3dc637f0-6904-4774-bd3f-5e02e4b4cf7d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3dc637f0-6904-4774-bd3f-5e02e4b4cf7d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T03:05:45Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9493267f8aa396b7c0ee6c471b443011460125e4f695f89356aef725d0e2880b","name":"Harry Kappen","registered_at":"2026-06-16T11:24:30Z","symbol":"NIM1036830","token_address":"0x16df44f25a79000620f11d57886a9ce4d78ca603","type":"artist","uuid":"3dc637f0-6904-4774-bd3f-5e02e4b4cf7d"}
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 0x9493267f8aa396b7c0ee6c471b443011460125e4f695f89356aef725d0e2880b. Chain 2 (Bitcoin): anchored in block 954040 (2026-06-17T03:05:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dc637f0-6904-4774-bd3f-5e02e4b4cf7d.json and https://artists.proofprofile.net/proofs/artist/3dc637f0-6904-4774-bd3f-5e02e4b4cf7d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T03:05:45Z
  text: {"copyright_id":"0x9493267f8aa396b7c0ee6c471b443011460125e4f695f89356aef725d0e2880b","name":"Harry Kappen","registered_at":"2026-06-16T11:24:30Z","symbol":"NIM1036830","token_address":"0x16df44f25a79000620f11d57886a9ce4d78ca603","type":"artist","uuid":"3dc637f0-6904-4774-bd3f-5e02e4b4cf7d"}
album: Escape
  type: MusicAlbum
  date published: 2022-03-01
album: Barefoot in the Dew
  type: MusicAlbum
  date published: 2022-05-30
album: Wargames
  type: MusicAlbum
  date published: 2022-09-05
album: The Freedom Inside
  type: MusicAlbum
  date published: 2023-01-03
album: Not all of us agreed
  type: MusicAlbum
  date published: 2023-06-10
album: One life
  type: MusicAlbum
  date published: 2023-12-01
album: "Cool Down"
  type: MusicAlbum
  date published: 2024-06-14
album: Time will tell
  type: MusicAlbum
  date published: 2024-07-20
album: Courage
  type: MusicAlbum
  date published: 2025-02-15
album: Four
  type: MusicAlbum
  date published: 2025-02-28
album: Four (LP)
  type: MusicAlbum
  date published: 2025-02-28