Vai-Vai
type: MusicGroup
description: Grêmio Recreativo Cultural Social Escola de Samba Vai-Vai, popularly known simply as Vai-Vai is a samba school from São Paulo, Brazil. At the beginning of the 20th century, there were in the neighbor
popularity: 3
followers: 67
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSTimestamp
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4328b432e1395068f076e382e4e64afe810e5436a267f652f256c9d876dc49c1. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21cbaf9c-c51e-4ce4-b20d-9a1e30b42156.json and https://artists.proofprofile.net/proofs/artist/21cbaf9c-c51e-4ce4-b20d-9a1e30b42156.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:14:26Z
track: G.R.C.E.S. Vai-vai - Quilombo do Futuro - Ao vivo
  type: MusicRecording
  duration: PT5M36S
  duration ms: 336538
  explicit: false
  by artist: Liga Independente das Escolas de Samba
  by artist: Vai-Vai
  by artist: Grazzi Brasil
  in album: Carnaval SP 2019 - Sambas de Enredo das Escolas de Samba de São Paulo
    type: MusicAlbum
    date published: 2018-12-14
  isrc code: BRLIE1800010
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  additional property: OTSTimestamp
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    value: 2026-07-02T05:09:12Z
  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 0x0ad51b835ece29080f5c572526ab835643405652bd511d79ccd24981f3af294e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRLIE1800010.
    date published: 2026-07-02T05:09:12Z
  audio: G.R.C.E.S. Vai-vai - Quilombo do Futuro - Ao vivo
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 149.811
    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: 0.367
    additional property: Energy
      type: PropertyValue
      value: 0.794
    additional property: Speechiness
      type: PropertyValue
      value: 0.118
    additional property: Acousticness
      type: PropertyValue
      value: 0.628
    additional property: Instrumentalness
      type: PropertyValue
      value: 0
    additional property: Liveness
      type: PropertyValue
      value: 0.595
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.56
    additional property: Loudness (dB)
      type: PropertyValue
      value: -11.592
    additional property: Key Name
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      value: Ab
    additional property: Mode Name
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      value: Major