David von Kampen
type: MusicGroup
genre: choral
popularity: 5
followers: 205
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x4fa2cd5b80691b0372e6156e713f4a502297e0a0b57c8dced3702e3ec0d2eca0
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954647
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954647
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d6f930e8-5abd-4096-a834-a9da16c144e1.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
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  value: 2026-06-21T04:36:58Z
additional property: OTSCanonicalRecord
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa2cd5b80691b0372e6156e713f4a502297e0a0b57c8dced3702e3ec0d2eca0. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6f930e8-5abd-4096-a834-a9da16c144e1.json and https://artists.proofprofile.net/proofs/artist/d6f930e8-5abd-4096-a834-a9da16c144e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:36:58Z
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album: The Collected Works of David von Kampen
  type: MusicAlbum
  date published: 2013-07-16
album: The Kansas-Nebraska Act
  type: MusicAlbum
  date published: 2017-07-04
album: 12 Very Short Pieces for Solo Piano
  type: MusicAlbum
  date published: 2020-07-24
album: Chamber Music
  type: MusicAlbum
  date published: 2021-08-11
album: Christmas Cantata
  type: MusicAlbum
  date published: 2021-12-02
album: 12 More Very Short Pieces for Solo Piano
  type: MusicAlbum
  date published: 2022-04-21
album: I'm Glad the Sky Is Painted Blue
  type: MusicAlbum
  date published: 2022-06-28
album: Nebraska Maritime Historians
  type: MusicAlbum
  date published: 2022-12-24
album: 12 Very Short Pieces for Solo Piano, Vol. 3
  type: MusicAlbum
  date published: 2023-04-13
album: You Have No Idea (Music from the Documentary)
  type: MusicAlbum
  date published: 2025-02-18
album: Seven Moods for Flute and Guitar
  type: MusicAlbum
  date published: 2025-05-13