Walter Kehl
type: MusicGroup
popularity: 4
followers: 56
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x98ec4503f8f14b999273b06efa08141cc71262d356313121a4679b985274a16a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954784
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954784
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef2d4bed-68aa-46eb-b10e-11e611193feb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ef2d4bed-68aa-46eb-b10e-11e611193feb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ef2d4bed-68aa-46eb-b10e-11e611193feb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-22T02:53:59Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x98ec4503f8f14b999273b06efa08141cc71262d356313121a4679b985274a16a","name":"Walter Kehl","registered_at":"2026-06-21T12:47:47Z","symbol":"NIM1927270","token_address":"0x760a5b5d524b835dd79eb261553ef1d8e82f9354","type":"artist","uuid":"ef2d4bed-68aa-46eb-b10e-11e611193feb"}
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 0x98ec4503f8f14b999273b06efa08141cc71262d356313121a4679b985274a16a. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef2d4bed-68aa-46eb-b10e-11e611193feb.json and https://artists.proofprofile.net/proofs/artist/ef2d4bed-68aa-46eb-b10e-11e611193feb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-22T02:53:59Z
  text: {"copyright_id":"0x98ec4503f8f14b999273b06efa08141cc71262d356313121a4679b985274a16a","name":"Walter Kehl","registered_at":"2026-06-21T12:47:47Z","symbol":"NIM1927270","token_address":"0x760a5b5d524b835dd79eb261553ef1d8e82f9354","type":"artist","uuid":"ef2d4bed-68aa-46eb-b10e-11e611193feb"}
album: Chopin & Grieg
  type: MusicAlbum
  date published: 2014-08-11
  track: Prélude in E-Moll, Op. 28, Nr. 4
    type: MusicRecording
    duration: PT2M7S
    duration ms: 127249
    explicit: false
    by artist: Walter Kehl
    in album: Chopin & Grieg
      type: MusicAlbum
      date published: 2014-08-11
    isrc code: DEAR41430731
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T05:59:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2ebfc5d4f2e827147eab5ed5e6ffd8b4696bb67bf2726c6f5b773b0936d221be
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958506
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958506
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR41430731
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T06:14:51Z
    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 0x2ebfc5d4f2e827147eab5ed5e6ffd8b4696bb67bf2726c6f5b773b0936d221be. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/DEAR41430731.
      date published: 2026-07-18T06:14:51Z
    audio: Prélude in E-Moll, Op. 28, Nr. 4
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 115.051
      additional property: Musical Key
        type: PropertyValue
        value: 9
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.482
      additional property: Energy
        type: PropertyValue
        value: 0.02
      additional property: Speechiness
        type: PropertyValue
        value: 0.116
      additional property: Acousticness
        type: PropertyValue
        value: 0.988
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.881
      additional property: Liveness
        type: PropertyValue
        value: 0.085
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.038
      additional property: Loudness (dB)
        type: PropertyValue
        value: -27.259
      additional property: Key Name
        type: PropertyValue
        value: A
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Piano Sketches
  type: MusicAlbum
  date published: 2016-02-24
album: Daydreaming
  type: MusicAlbum
  date published: 2017-10-06
album: Nocturne
  type: MusicAlbum
  date published: 2019-09-27
album: Yellow Piano
  type: MusicAlbum
  date published: 2022-09-03
album: Yellow Piano
  type: MusicAlbum
  date published: 2022-12-29
album: Piano Sketches
  type: MusicAlbum
  date published: 2022-12-29
album: LANDS END
  type: MusicAlbum
  date published: 2023-10-14
album: LANDS END
  type: MusicAlbum
  date published: 2023-10-15