Karel Van Steenhoven
type: MusicGroup
description: Karel van Steenhoven (born November 1958 in Voorburg) is a Dutch recorder player and composer. Biography Starting with a green plastic instrument when he was four years old, Steenhoven began to study
popularity: 3
followers: 27
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1892b2ce0b32d662d7bce1242557592c3f80ea23cfe33f7383f3f29d7be63097
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bc114824-5518-4d5d-9a7b-b418489573e8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bc114824-5518-4d5d-9a7b-b418489573e8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bc114824-5518-4d5d-9a7b-b418489573e8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1892b2ce0b32d662d7bce1242557592c3f80ea23cfe33f7383f3f29d7be63097","name":"Karel Van Steenhoven","registered_at":"2026-06-20T17:15:35Z","symbol":"NIM1664418","token_address":"0xb9c32d1fa8bcc80db0705b6f1739bdfa8aa704a9","type":"artist","uuid":"bc114824-5518-4d5d-9a7b-b418489573e8"}
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 0x1892b2ce0b32d662d7bce1242557592c3f80ea23cfe33f7383f3f29d7be63097. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc114824-5518-4d5d-9a7b-b418489573e8.json and https://artists.proofprofile.net/proofs/artist/bc114824-5518-4d5d-9a7b-b418489573e8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:10:41Z
  text: {"copyright_id":"0x1892b2ce0b32d662d7bce1242557592c3f80ea23cfe33f7383f3f29d7be63097","name":"Karel Van Steenhoven","registered_at":"2026-06-20T17:15:35Z","symbol":"NIM1664418","token_address":"0xb9c32d1fa8bcc80db0705b6f1739bdfa8aa704a9","type":"artist","uuid":"bc114824-5518-4d5d-9a7b-b418489573e8"}
album: Arias for Soprano and Oboe from Cantatas by J.S. Bach
  type: MusicAlbum
  date published: 1998-01-01
track: Harpsichord Concerto No. 6 in F Major, BWV 1057: III. Allegro assai

Harpsichord Concerto No. 6 in F Major, BWV 1057: III. Allegro assai
type: MusicRecording
duration: PT5M16S
duration ms: 316506
explicit: false
by artist: Johann Sebastian Bach
by artist: New Bach Collegium Musicum Leipzig
by artist: Burkhard Glaetzner
by artist: Paul Leenhouts
by artist: Karel Van Steenhoven
by artist: Christine Schornsheim
in album: Johann Sebastian Bach: Harpsichord Concertos (Schornsheim, New Bach Collegium Musicum, Glaetzner)
  type: MusicAlbum
  date published: 1991
popularity: 12
genre: classical
genre: classical-piano
isrc code: DES380004596
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-26T00:16:28+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdb0f6cbd481677e41c88e61dc39c2950bfb1a8e8eaec1a6069721b729f2b1c94
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380004596
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 956304
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-02T03:55:08+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0f6cbd481677e41c88e61dc39c2950bfb1a8e8eaec1a6069721b729f2b1c94. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380004596.
  date published: 2026-07-02T11:34:59Z
audio: Harpsichord Concerto No. 6 in F Major, BWV 1057: III. Allegro assai
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 116.312
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.437
  additional property: Energy
    type: PropertyValue
    value: 0.256
  additional property: Speechiness
    type: PropertyValue
    value: 0.033
  additional property: Acousticness
    type: PropertyValue
    value: 0.835
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.112
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.671
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.154
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major