C4OS
type: MusicGroup
genre: trip hop
popularity: 12
followers: 511
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf624fb9e14a26e2327084a3e3527d697e08b71b6211594a7efb5249989cd6fde
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953625
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953625
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2558c12c-1eef-4898-a9f6-375f69337e41.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2558c12c-1eef-4898-a9f6-375f69337e41.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2558c12c-1eef-4898-a9f6-375f69337e41
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T11:37:06Z
additional property: OTSCanonicalRecord
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 0xf624fb9e14a26e2327084a3e3527d697e08b71b6211594a7efb5249989cd6fde. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2558c12c-1eef-4898-a9f6-375f69337e41.json and https://artists.proofprofile.net/proofs/artist/2558c12c-1eef-4898-a9f6-375f69337e41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T11:37:06Z
album: Explosión de Rimas
  type: MusicAlbum
  date published: 1999-06-21
album: En Ciertas Ocasiones
  type: MusicAlbum
  date published: 2013-06-06
album: Vago Con Paciencia
  type: MusicAlbum
  date published: 2013-06-06
album: El Universo Se Precipita
  type: MusicAlbum
  date published: 2013-06-06
album: Buscando Una Tumba
  type: MusicAlbum
  date published: 2013-06-06
album: Volver (Radio Edit)
  type: MusicAlbum
  date published: 2013-06-21
album: Payaso
  type: MusicAlbum
  date published: 2015-06-06
album: Sinestatus
  type: MusicAlbum
  date published: 2015-12-21
album: Patoja
  type: MusicAlbum
  date published: 2015-12-21
album: Pirámide
  type: MusicAlbum
  date published: 2015-12-21
album: Remolino
  type: MusicAlbum
  date published: 2015-12-21
album: Estepa
  type: MusicAlbum
  date published: 2015-12-21
album: Neurastenia
  type: MusicAlbum
  date published: 2016-03-21
album: Mago Del Viento
  type: MusicAlbum
  date published: 2017-12-21
album: Oros
  type: MusicAlbum
  date published: 2018-03-27
album: Abstracto
  type: MusicAlbum
  date published: 2018-10-29
album: Códice
  type: MusicAlbum
  date published: 2018-12-21
album: Desierto
  type: MusicAlbum
  date published: 2019-09-23
album: Mercurio
  type: MusicAlbum
  date published: 2020-06-06
album: Mercurio
  type: MusicAlbum
  date published: 2020-06-06
album: Visiones
  type: MusicAlbum
  date published: 2020-11-06
album: Vago Con Paciencia (REMIX)
  type: MusicAlbum
  date published: 2021-02-12
album: Dioscuro (REMIX)
  type: MusicAlbum
  date published: 2021-03-26
album: Dioscuro (REMIX INSTRUMENTAL)
  type: MusicAlbum
  date published: 2021-10-15
album: Recuerdo
  type: MusicAlbum
  date published: 2023-02-24
album: Fantasma (REMIX)
  type: MusicAlbum
  date published: 2023-03-24
album: Vinilo
  type: MusicAlbum
  date published: 2023-04-21
album: Vinilo
  type: MusicAlbum
  date published: 2023-04-21
album: Vinilo
  type: MusicAlbum
  date published: 2023-04-21
album: Casete
  type: MusicAlbum
  date published: 2023-06-23
album: Muestra
  type: MusicAlbum
  date published: 2023-07-21
album: Pánico
  type: MusicAlbum
  date published: 2024-01-26
album: Estepa (Remaster)
  type: MusicAlbum
  date published: 2024-12-21
  track: Eva
    type: MusicRecording
    duration: PT4M14S
    duration ms: 254117
    explicit: false
    by artist: C4OS
    in album: Estepa (Remaster)
      type: MusicAlbum
      date published: 2024-12-21
    genre: trip hop
    isrc code: QZHN82586385
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-03T18:10:29+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xf7d1eea09ba147af8c33b87b18fc55bd8c0612618f860de5860735f457012f71
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956545
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956545
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82586385
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T19:59:51Z
    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 0xf7d1eea09ba147af8c33b87b18fc55bd8c0612618f860de5860735f457012f71. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN82586385.
      date published: 2026-07-03T19:59:51Z
    audio: Eva
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 149.658
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.524
      additional property: Energy
        type: PropertyValue
        value: 0.72
      additional property: Speechiness
        type: PropertyValue
        value: 0.243
      additional property: Acousticness
        type: PropertyValue
        value: 0.192
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Fantasma (REMIX INSTRUMENTAL)
album: No Hay Tongo
album: Que Es Estilo

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.208

Valence (Positivity)
type: PropertyValue
value: 0.294

Loudness (dB)
type: PropertyValue
value: -5.018

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

Fantasma (REMIX INSTRUMENTAL)
type: MusicAlbum
date published: 2025-02-24

No Hay Tongo
type: MusicAlbum
date published: 2025-09-14
track: No Hay Tongo
  type: MusicRecording
  duration: PT2M32S
  duration ms: 152000
  explicit: true
  by artist: C4OS
  in album: No Hay Tongo
    type: MusicAlbum
    date published: 2025-09-14
  genre: trip hop
  isrc code: QZZ7U2590429
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-20T05:32:41+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x0b63845f5528c202469786d399420fdc8d1085d59d0efcaa8327620247a8cf2d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 958834
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/958834
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7U2590429
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-20T05:55:47Z
  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 0x0b63845f5528c202469786d399420fdc8d1085d59d0efcaa8327620247a8cf2d. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QZZ7U2590429.
    date published: 2026-07-20T05:55:47Z
  audio: No Hay Tongo
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 89.718
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.693
    additional property: Energy
      type: PropertyValue
      value: 0.872
    additional property: Speechiness
      type: PropertyValue
      value: 0.365
    additional property: Acousticness
      type: PropertyValue
      value: 0.381
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.184
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.842
    additional property: Loudness (dB)
      type: PropertyValue
      value: -4.264
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Que Es Estilo
type: MusicAlbum
date published: 2025-10-26
track: Que Es Estilo
  type: MusicRecording
  duration: PT2M51S
  duration ms: 171428
  explicit: true
  by artist: C4OS
  in album: Que Es Estilo
    type: MusicAlbum
    date published: 2025-10-26
  genre: trip hop
  isrc code: QZAKB2531971
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T05:42:29+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x40105a74e3a8da6fee873fc578b77d8b6e486caf2c236c0536f7c104fd8eaacf
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956772
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956772
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAKB2531971
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-05T10:01:46Z
  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 0x40105a74e3a8da6fee873fc578b77d8b6e486caf2c236c0536f7c104fd8eaacf. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZAKB2531971.
    date published: 2026-07-05T10:01:46Z
  audio: Que Es Estilo
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 168.078
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 4
    additional property: Danceability
      type: PropertyValue
      value: 0.687
    additional property: Energy
      type: PropertyValue
      value: 0.688
    additional property: Speechiness
      type: PropertyValue
      value: 0.354
    additional property: Acousticness
      type: PropertyValue
      value: 0.122
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.423
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.593
    additional property: Loudness (dB)
      type: PropertyValue
      value: -6.142
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major