Bob van Stempvoort
type: MusicGroup
popularity: 20
followers: 65
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x861653c82408a27fef3cdc42d295d81229722989d514d5a29dc8e47b234e8268
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953684
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953684
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/656a1fc8-a56d-462c-953b-d9c0fc287449.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/656a1fc8-a56d-462c-953b-d9c0fc287449.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/656a1fc8-a56d-462c-953b-d9c0fc287449
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T19:51:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x861653c82408a27fef3cdc42d295d81229722989d514d5a29dc8e47b234e8268","name":"Bob van Stempvoort","registered_at":"2026-06-14T15:04:07Z","symbol":"NIM0490176","token_address":"0xe53eb040c3990c0b9e2e738e2acddb5a67d5b610","type":"artist","uuid":"656a1fc8-a56d-462c-953b-d9c0fc287449"}
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 0x861653c82408a27fef3cdc42d295d81229722989d514d5a29dc8e47b234e8268. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/656a1fc8-a56d-462c-953b-d9c0fc287449.json and https://artists.proofprofile.net/proofs/artist/656a1fc8-a56d-462c-953b-d9c0fc287449.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T19:51:57Z
  text: {"copyright_id":"0x861653c82408a27fef3cdc42d295d81229722989d514d5a29dc8e47b234e8268","name":"Bob van Stempvoort","registered_at":"2026-06-14T15:04:07Z","symbol":"NIM0490176","token_address":"0xe53eb040c3990c0b9e2e738e2acddb5a67d5b610","type":"artist","uuid":"656a1fc8-a56d-462c-953b-d9c0fc287449"}
track: Heer Wees Mijn Gids
  type: MusicRecording
  duration: PT3M37S
  duration ms: 217375
  explicit: false
  by artist: Christelijk Gemengde Zangvereniging De Lofstem - Oosterbeek
  by artist: Gebroeders Brouwer
  by artist: Bob van Stempvoort
  in album: Juich Aarde, Juicht Alom De Heer
    type: MusicAlbum
    date published: 1987-08-30
  isrc code: NLY8X1801204
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-30T14:58:54+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x74a08d9ac1997c8d49a9ea92d1a79d9c4a8ba9cf951cc9ceb4f56f2cd1c3489c
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960273
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960273
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY8X1801204
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-30T15:42:38Z
  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 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 0x74a08d9ac1997c8d49a9ea92d1a79d9c4a8ba9cf951cc9ceb4f56f2cd1c3489c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLY8X1801204.
    date published: 2026-07-30T15:42:38Z
  audio: Heer Wees Mijn Gids
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 88.221
    additional property: Musical Key
      type: PropertyValue
      value: 10
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.116
    additional property: Energy
      type: PropertyValue
      value: 0.182
    additional property: Speechiness
      type: PropertyValue
      value: 0.038
    additional property: Acousticness
      type: PropertyValue
      value: 0.981
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.422
    additional property: Liveness
      type: PropertyValue
      value: 0.095
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.067
    additional property: Loudness (dB)
      type: PropertyValue
      value: -19.237
    additional property: Key Name
      type: PropertyValue
      value: Bb
    additional property: Mode Name
      type: PropertyValue
      value: Major