Marvvila
type: MusicGroup
genre: pagode
genre: samba
description: Kassia Freire Marvila (born 14 May 1999), better known as Marvvila, is a Brazilian pagode singer. In addition to her music, she is well known for her participation in The Voice Brasil in 2016, and lat
popularity: 63
followers: 191575
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x40f6d0916ba32abc071718d375c63a39182defe2a54f97a4560bb96a41d3506b
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bd4ddecb-5f66-4a2d-ac8e-ccc72625d325.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bd4ddecb-5f66-4a2d-ac8e-ccc72625d325.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f6d0916ba32abc071718d375c63a39182defe2a54f97a4560bb96a41d3506b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd4ddecb-5f66-4a2d-ac8e-ccc72625d325.json and https://artists.proofprofile.net/proofs/artist/bd4ddecb-5f66-4a2d-ac8e-ccc72625d325.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
album: O Golpe
  type: MusicAlbum
  date published: 2024-08-29
  track: O Golpe
    type: MusicRecording
    duration: PT3M13S
    duration ms: 193587
    explicit: false
    by artist: Kaiquy
    by artist: Marvvila
    by artist: AlmaViva Música
    in album: O Golpe
      type: MusicAlbum
      date published: 2024-08-29
    popularity: 20
    isrc code: BKAM92400037
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-06-19T16:33:20+00:00
    additional property: CopyrightChainExplorerURL
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BKAM92400037
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-02T03:30:09Z
    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 0x4c223bf7b76198e019cd4ad5c11b3997e6fa1e9393a8cd0374ab0b5317867be1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BKAM92400037.
      date published: 2026-07-02T03:30:09Z
    audio: O Golpe
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 149.262
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.672
      additional property: Energy
        type: PropertyValue
        value: 0.725
      additional property: Speechiness
        type: PropertyValue
        value: 0.048
      additional property: Acousticness
        type: PropertyValue
        value: 0.537
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.114
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.683
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.861
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
track: Pode escrever - Ao Vivo
  type: MusicRecording
  duration: PT3M13S
  duration ms: 193349
  explicit: false
  by artist: Marvvila
  in album: Pagode Sertanejo Forró Agro Show 2024
    type: MusicAlbum
    date published: 2024-08-01
  popularity: 0
  isrc code: BRWMB2301200
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-19T09:41:49+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRWMB2301200
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  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 0x93e0e48b1d1b623deb563f14e52ba6fec3f6b6ac4d8972e82b0c330f49edb9de. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BRWMB2301200.
    date published: 2026-07-02T03:30:09Z
  audio: Pode escrever - Ao Vivo
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 142.305
    additional property: Musical Key
      type: PropertyValue
      value: 8
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.404
    additional property: Energy
      type: PropertyValue
      value: 0.618
    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
      type: PropertyValue
      value: 0.759
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.915
    additional property: Valence (Positivity)
    additional property: Loudness (dB)
    additional property: Key Name
    additional property: Mode Name
track: Vibezinha

Valence (Positivity)
type: PropertyValue
value: 0.375

Loudness (dB)
type: PropertyValue
value: -11.117

Key Name
type: PropertyValue
value: Ab

Mode Name
type: PropertyValue
value: Major

Vibezinha
type: MusicRecording
duration: PT2M28S
duration ms: 148325
explicit: false
by artist: MC Kekel
by artist: Marvvila
by artist: Cabrera
in album: Vibezinha
  type: MusicAlbum
  date published: 2024-07-31
isrc code: BRKO12400365
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-10T17:24:54+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd750569a9646dd8b19767ef64f57990b28ea0fd9baa09af2f5756d6840bcb0ac
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953520
additional property: OTSBitcoinBlockVerifyURL
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  value: https://blockstream.info/api/block-height/953520
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRKO12400365
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T13:32:09Z
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 0xd750569a9646dd8b19767ef64f57990b28ea0fd9baa09af2f5756d6840bcb0ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRKO12400365.
  date published: 2026-06-13T13:32:09Z
audio: Vibezinha
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 168.174
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.628
  additional property: Energy
    type: PropertyValue
    value: 0.652
  additional property: Speechiness
    type: PropertyValue
    value: 0.054
  additional property: Acousticness
    type: PropertyValue
    value: 0.141
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.146
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.677
  additional property: Loudness (dB)
    type: PropertyValue
    value: -11.876
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major