Federico Kempff
type: MusicGroup
genre: nueva trova
genre: post-punk
popularity: 13
followers: 925
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5b4a075cec33136d83c0702f60ec9df26dd5aa5329cbd3d9801cdd61a1f5da28
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953778
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953778
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ab3ad3b5-cade-46cf-80aa-da10b37299b2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ab3ad3b5-cade-46cf-80aa-da10b37299b2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ab3ad3b5-cade-46cf-80aa-da10b37299b2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:57:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5b4a075cec33136d83c0702f60ec9df26dd5aa5329cbd3d9801cdd61a1f5da28","name":"Federico Kempff","registered_at":"2026-06-14T22:30:31Z","symbol":"NIM0596623","token_address":"0xf8f9693c2c75af72c2684cd2c865a424f328365e","type":"artist","uuid":"ab3ad3b5-cade-46cf-80aa-da10b37299b2"}
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 0x5b4a075cec33136d83c0702f60ec9df26dd5aa5329cbd3d9801cdd61a1f5da28. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab3ad3b5-cade-46cf-80aa-da10b37299b2.json and https://artists.proofprofile.net/proofs/artist/ab3ad3b5-cade-46cf-80aa-da10b37299b2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:57:35Z
  text: {"copyright_id":"0x5b4a075cec33136d83c0702f60ec9df26dd5aa5329cbd3d9801cdd61a1f5da28","name":"Federico Kempff","registered_at":"2026-06-14T22:30:31Z","symbol":"NIM0596623","token_address":"0xf8f9693c2c75af72c2684cd2c865a424f328365e","type":"artist","uuid":"ab3ad3b5-cade-46cf-80aa-da10b37299b2"}
album: Tardes de sol
  type: MusicAlbum
  date published: 2003-01-07
album: Tardes de Sol
  type: MusicAlbum
  date published: 2003-01-07
album: Desesperado secuencia uno
  type: MusicAlbum
  date published: 2004-12-04
album: Desesperado Secuencia Uno
  type: MusicAlbum
  date published: 2004-12-04
album: Almas
  type: MusicAlbum
  date published: 2020-02-05
album: Ruinas
  type: MusicAlbum
  date published: 2020-07-12
album: Ruinas
  type: MusicAlbum
  date published: 2020-07-12
  track: Ruinas
    type: MusicRecording
    duration: PT3M33S
    duration ms: 213806
    explicit: false
    by artist: Federico Kempff
    in album: Ruinas
      type: MusicAlbum
      date published: 2020-07-12
    genre: nueva trova
    genre: post-punk
    isrc code: ARDC42000002
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T16:37:45+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x4aa3af1218148ee6cb6fc1a400c3c49fdd4049c9b0689bbb8d3de5395ac9b82a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958448
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958448
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARDC42000002
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T19:49:21Z
    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 0x4aa3af1218148ee6cb6fc1a400c3c49fdd4049c9b0689bbb8d3de5395ac9b82a. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ARDC42000002.
      date published: 2026-07-17T19:49:21Z
    audio: Ruinas
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 115.013
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.638
      additional property: Energy
        type: PropertyValue
        value: 0.541
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.849
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.106
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.281
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.563
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Estos Días
  type: MusicAlbum
  date published: 2020-08-02
album: Estos dias
  type: MusicAlbum
  date published: 2020-08-02
album: Almas
  type: MusicAlbum
  date published: 2021-02-05
album: Temporal
  type: MusicAlbum
  date published: 2024-05-10