Eduardo Rojas
type: MusicGroup
genre: tango
popularity: 2
followers: 177
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/8310e6f3-21b3-40fe-84fa-81106401bf75.ots
additional property: OTSRecordURL
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8310e6f3-21b3-40fe-84fa-81106401bf75
additional property: OTSTimestamp
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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 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 0x9421614239279452bf31278b28baa80beef4a8888ae3ee5ac54897c5d96eea09. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8310e6f3-21b3-40fe-84fa-81106401bf75.json and https://artists.proofprofile.net/proofs/artist/8310e6f3-21b3-40fe-84fa-81106401bf75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x9421614239279452bf31278b28baa80beef4a8888ae3ee5ac54897c5d96eea09","name":"Eduardo Rojas","registered_at":"2026-06-17T11:18:25Z","symbol":"NIM1378882","token_address":"0xcd009ef32d1da74316200b3eb915a2449cd9c89d","type":"artist","uuid":"8310e6f3-21b3-40fe-84fa-81106401bf75"}
album: Here & There - Exploring the Americas
  type: MusicAlbum
  date published: 2012-08-18
album: Pueblito Viejo
  type: MusicAlbum
  date published: 2015-02-18
album: Eduardo Rojas Plays Beethoven: Piano Sonatas, Vol. 1
  type: MusicAlbum
  date published: 2015-02-26
album: El esmeraldero de muzo
  type: MusicAlbum
  date published: 2023-01-21
  track: El esmeraldero de muzo
    type: MusicRecording
    duration: PT3M9S
    duration ms: 189693
    explicit: false
    by artist: Eduardo Rojas
    in album: El esmeraldero de muzo
      type: MusicAlbum
      date published: 2023-01-21
    genre: tango
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNW72354250
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T07:19:23Z
    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 0xf4151b0a8e2722e21d86532e63822428ec4d98cf070372ec3e060a8223d8ac4f. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZNW72354250.
      date published: 2026-07-22T07:19:23Z
    audio: El esmeraldero de muzo
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.194
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major