Oscar Varona
type: MusicGroup
description: Oscar Varona (born July 22, 1949) is a former basketball player from Cuba, who won the bronze medal with the men's national team at the 1972 Summer Olympics in Munich, West Germany. References databa
popularity: 3
followers: 68
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xbe121e7810fc1a2c06ea72c5b6f1cd4a978178575d3f82c71cad6ba79363b2b7
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
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additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/178fd1bb-2c52-4a00-8264-55c9e21d6cfc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/178fd1bb-2c52-4a00-8264-55c9e21d6cfc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
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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 0xbe121e7810fc1a2c06ea72c5b6f1cd4a978178575d3f82c71cad6ba79363b2b7. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/178fd1bb-2c52-4a00-8264-55c9e21d6cfc.json and https://artists.proofprofile.net/proofs/artist/178fd1bb-2c52-4a00-8264-55c9e21d6cfc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:39:24Z
  text: {"copyright_id":"0xbe121e7810fc1a2c06ea72c5b6f1cd4a978178575d3f82c71cad6ba79363b2b7","name":"Oscar Varona","registered_at":"2026-06-15T21:46:00Z","symbol":"NIM0841388","token_address":"0xc6bce0718db5590d3e82563237a074536b6cb60b","type":"artist","uuid":"178fd1bb-2c52-4a00-8264-55c9e21d6cfc"}
album: Tomados De La Mano (Maqueta)
  type: MusicAlbum
  date published: 2024-07-17
album: Días De Ayer
  type: MusicAlbum
  date published: 2024-07-31
album: Un Millón De Primaveras-Rap (Remasterizada)
  type: MusicAlbum
  date published: 2024-10-19
  track: Un Millón De Primaveras-Rap - Remasterizada
    type: MusicRecording
    duration: PT3M42S
    duration ms: 222400
    explicit: false
    by artist: Oscar Varona
    in album: Un Millón De Primaveras-Rap (Remasterizada)
      type: MusicAlbum
      date published: 2024-10-19
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    additional property: CopyrightStatus
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    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFS2485225
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x579ef8a05d90108253a285a48e348e997c2d0385741dd3b03349ef451b923253. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFS2485225.
      date published: 2026-07-05T01:12:41Z
    audio: Un Millón De Primaveras-Rap - Remasterizada
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 95.057
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.719
      additional property: Energy
        type: PropertyValue
        value: 0.491
      additional property: Speechiness
        type: PropertyValue
        value: 0.18
      additional property: Acousticness
        type: PropertyValue
        value: 0.464
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.585
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.533
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.133
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Nostalgia
  type: MusicAlbum
  date published: 2025-06-14