Tango
type: MusicGroup
genre: big beat
genre: jungle
description: Tango is a partner and social dance that originated in the 1880s along the Río de la Plata, the natural border between Argentina and Uruguay. The tango was born in the impoverished port areas of th
popularity: 13
followers: 1134
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  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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  date published: 2026-06-15T07:48:25Z
album: Electric Ball
  type: MusicAlbum
  date published: 1986
album: Tango 87
  type: MusicAlbum
  date published: 1987
album: Můra, Hop!
  type: MusicAlbum
  date published: 1988
album: 1984-1988
  type: MusicAlbum
  date published: 1994
  track: Co S Tím Sklem?
    type: MusicRecording
    duration: PT4M41S
    duration ms: 281706
    explicit: false
    by artist: Tango
    in album: 1984-1988
      type: MusicAlbum
      date published: 1994
    genre: big beat
    genre: jungle
    isrc code: CZA168600043
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-15T12:00:27Z
    audio: Co S Tím Sklem?
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 118.648
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.744
      additional property: Energy
        type: PropertyValue
        value: 0.731
      additional property: Speechiness
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        value: 0.045
      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
        type: PropertyValue
        value: 0.038
      additional property: Valence (Positivity)
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        value: 0.73
      additional property: Loudness (dB)
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      additional property: Key Name
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      additional property: Mode Name
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album: Think Twice / Ouija Awakening
  type: MusicAlbum
  date published: 1994-05-13
album: Elektrický Bál (Bonus Track Version)
  type: MusicAlbum
  date published: 2010-11-18
album: Tango 1984-1988
  type: MusicAlbum
  date published: 2010-11-18
track: Fever
  type: MusicRecording
  duration: PT6M40S
  duration ms: 400222
  explicit: false
  by artist: Tango
  in album: Transcentral Connection
    type: MusicAlbum
    date published: 1996-10-07
  popularity: 12
  isrc code: GBAGN9600150
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    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
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    date published: 2026-07-22T15:38:35Z
  audio: Fever
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Time Signature
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    additional property: Instrumentalness
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    additional property: Valence (Positivity)
    additional property: Loudness (dB)
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Danceability
type: PropertyValue
value: 0.46

Energy
type: PropertyValue
value: 0.968

Speechiness
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value: 0.068

Acousticness
type: PropertyValue
value: 0.073

Instrumentalness
type: PropertyValue
value: 0.741

Liveness
type: PropertyValue
value: 0.123

Valence (Positivity)
type: PropertyValue
value: 0.572

Loudness (dB)
type: PropertyValue
value: -11.707

Key Name
type: PropertyValue
value: Bb

Mode Name
type: PropertyValue
value: Major