Hans Oudenaarden
type: MusicGroup
genre: classical piano
popularity: 5
followers: 46
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x06fcf9eb9cfeb8a13acb94c63d48f70e368f272f5b6f9867049f66c73d75e107
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953918
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953918
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T08:55:04Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x06fcf9eb9cfeb8a13acb94c63d48f70e368f272f5b6f9867049f66c73d75e107","name":"Hans Oudenaarden","registered_at":"2026-06-15T22:55:09Z","symbol":"NIM0857879","token_address":"0x2ce621117cbb78d7c15346df6696e92e22bab23a","type":"artist","uuid":"1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d"}
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 0x06fcf9eb9cfeb8a13acb94c63d48f70e368f272f5b6f9867049f66c73d75e107. Chain 2 (Bitcoin): anchored in block 953918 (2026-06-16T08:55:04Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d.json and https://artists.proofprofile.net/proofs/artist/1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T08:55:04Z
  text: {"copyright_id":"0x06fcf9eb9cfeb8a13acb94c63d48f70e368f272f5b6f9867049f66c73d75e107","name":"Hans Oudenaarden","registered_at":"2026-06-15T22:55:09Z","symbol":"NIM0857879","token_address":"0x2ce621117cbb78d7c15346df6696e92e22bab23a","type":"artist","uuid":"1ad5fb4f-7ea5-4701-8c8a-4b2b61e6a38d"}
album: Salut d'amour
  type: MusicAlbum
  date published: 1989-07-01
  track: Poème op. 41 no. 6
    type: MusicRecording
    duration: PT2M10S
    duration ms: 130750
    explicit: false
    by artist: Fibich
    by artist: Hans Oudenaarden
    in album: Salut d'amour
      type: MusicAlbum
      date published: 1989-07-01
    popularity: 1
    isrc code: QZDA42256832
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-31T11:02:21+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xd50836596dae474289adf02e9b10f69f5820e718280556477bd88e1883e731fb
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960397
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960397
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA42256832
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T12:24:41Z
    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 0xd50836596dae474289adf02e9b10f69f5820e718280556477bd88e1883e731fb. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDA42256832.
      date published: 2026-07-31T12:24:41Z
    audio: Poème op. 41 no. 6
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 97.427
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.39
      additional property: Energy
        type: PropertyValue
        value: 0.02
      additional property: Speechiness
        type: PropertyValue
        value: 0.046
      additional property: Acousticness
        type: PropertyValue
        value: 0.994
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.804
      additional property: Liveness
        type: PropertyValue
        value: 0.106
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.124
      additional property: Loudness (dB)
        type: PropertyValue
        value: -25.84
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Natuurlijk
  type: MusicAlbum
  date published: 1994-01-01
  track: Notenkraker Suite | Dans Van De Suikerfee
    type: MusicRecording
    duration: PT1M57S
    duration ms: 117050
    explicit: false
    by artist: Pyotr Ilyich Tchaikovsky
    by artist: Hans Oudenaarden
    in album: Natuurlijk
      type: MusicAlbum
      date published: 1994-01-01
    popularity: 3
    isrc code: QZDA62292778
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-30T00:01:10+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3e56b561b6715a4804de1102f6e773eca00ab26c0a514d8fcfa791e9274210a3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960175
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960175
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA62292778
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-30T00:16:15Z
    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 0x3e56b561b6715a4804de1102f6e773eca00ab26c0a514d8fcfa791e9274210a3. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZDA62292778.
      date published: 2026-07-30T00:16:15Z
    audio: Notenkraker Suite | Dans Van De Suikerfee
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 126.828
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.426
      additional property: Energy
        type: PropertyValue
        value: 0.038
      additional property: Speechiness
        type: PropertyValue
        value: 0.037
      additional property: Acousticness
        type: PropertyValue
        value: 0.991
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.911
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Double Portrait
album: Proficiat Ome Daan!

Liveness
type: PropertyValue
value: 0.113

Valence (Positivity)
type: PropertyValue
value: 0.103

Loudness (dB)
type: PropertyValue
value: -30.762

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Minor

Double Portrait
type: MusicAlbum
date published: 2022-03-07

Proficiat Ome Daan!
type: MusicAlbum
date published: 1994-10-10