David Lempell
type: MusicGroup
genre: french pop
popularity: 8
followers: 1766
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf37e4e34f1ffab187fac47fa9cf62c9a6f5889a250c1d1e01c640d61145a995c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953841
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953841
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/005c9346-d348-43b5-bd91-b5fed3fd3bf9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/005c9346-d348-43b5-bd91-b5fed3fd3bf9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/005c9346-d348-43b5-bd91-b5fed3fd3bf9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:20:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf37e4e34f1ffab187fac47fa9cf62c9a6f5889a250c1d1e01c640d61145a995c","name":"David Lempell","registered_at":"2026-06-15T13:40:21Z","symbol":"NIM0725574","token_address":"0x2a486a40486f000d54f036095a7a150e1677a8fc","type":"artist","uuid":"005c9346-d348-43b5-bd91-b5fed3fd3bf9"}
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 0xf37e4e34f1ffab187fac47fa9cf62c9a6f5889a250c1d1e01c640d61145a995c. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/005c9346-d348-43b5-bd91-b5fed3fd3bf9.json and https://artists.proofprofile.net/proofs/artist/005c9346-d348-43b5-bd91-b5fed3fd3bf9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:39:16Z
  text: {"copyright_id":"0xf37e4e34f1ffab187fac47fa9cf62c9a6f5889a250c1d1e01c640d61145a995c","name":"David Lempell","registered_at":"2026-06-15T13:40:21Z","symbol":"NIM0725574","token_address":"0x2a486a40486f000d54f036095a7a150e1677a8fc","type":"artist","uuid":"005c9346-d348-43b5-bd91-b5fed3fd3bf9"}
album: Isolé
  type: MusicAlbum
  date published: 2021-03-12
album: Coute que coute
  type: MusicAlbum
  date published: 2021-04-09
album: Coute que coute
  type: MusicAlbum
  date published: 2021-04-09
album: Coûte que coûte (Remix)
  type: MusicAlbum
  date published: 2021-10-15
album: Jealous Guy
  type: MusicAlbum
  date published: 2022-03-11
album: Désarmé
  type: MusicAlbum
  date published: 2022-04-01
album: Pas lui
  type: MusicAlbum
  date published: 2022-12-02
album: Tu n'es plus là
  type: MusicAlbum
  date published: 2023-03-29
  track: Tu n'es plus là
    type: MusicRecording
    duration: PT2M28S
    duration ms: 148734
    explicit: false
    by artist: David Lempell
    in album: Tu n'es plus là
      type: MusicAlbum
      date published: 2023-03-29
    genre: french pop
    isrc code: FRE3O2300010
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T02:22:31+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xb1e5bef06361c876ffbfae13c4c8aefe2b35d3df092826159fb604826313fdd2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958228
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958228
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRE3O2300010
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T05:23:36Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e5bef06361c876ffbfae13c4c8aefe2b35d3df092826159fb604826313fdd2. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:23:36Z), 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/FRE3O2300010.
      date published: 2026-07-16T05:23:36Z
    audio: Tu n'es plus là
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.357
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.474
      additional property: Energy
        type: PropertyValue
        value: 0.353
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.882
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.185
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.495
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.945
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Nuit Blanche
  type: MusicAlbum
  date published: 2023-04-21
album: Reste
  type: MusicAlbum
  date published: 2025-06-05
  track: Reste
    type: MusicRecording
    duration: PT2M37S
    duration ms: 157706
    explicit: false
    by artist: David Lempell
    in album: Reste
      type: MusicAlbum
      date published: 2025-06-05
    genre: french pop
    isrc code: FRPZ92521820
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T08:12:55+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x949641bd27e050f6279b15c12b40da76aaaf0e2ca89204c32b351808bda5d9d9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956639
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956639
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRPZ92521820
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T11:19:20Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949641bd27e050f6279b15c12b40da76aaaf0e2ca89204c32b351808bda5d9d9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRPZ92521820.
      date published: 2026-07-04T11:19:20Z
    audio: Reste
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 123.501
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Mode (Major/Minor)
type: PropertyValue
value: 1

Time Signature
type: PropertyValue
value: 4

Danceability
type: PropertyValue
value: 0.73

Energy
type: PropertyValue
value: 0.391

Speechiness
type: PropertyValue
value: 0.217

Acousticness
type: PropertyValue
value: 0.44

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.557

Valence (Positivity)
type: PropertyValue
value: 0.469

Loudness (dB)
type: PropertyValue
value: -9.11

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major