María Esteban Quintet
type: MusicGroup
genre: vocal jazz
popularity: 22
followers: 372
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
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/cd316e70-4f35-4101-9b03-8f471be4be5e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cd316e70-4f35-4101-9b03-8f471be4be5e.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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 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 0xb22f9fd256f4141cf7677aadf81f5a73077447a5ad3c95e98b2b76bdb482315b. 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/cd316e70-4f35-4101-9b03-8f471be4be5e.json and https://artists.proofprofile.net/proofs/artist/cd316e70-4f35-4101-9b03-8f471be4be5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0xb22f9fd256f4141cf7677aadf81f5a73077447a5ad3c95e98b2b76bdb482315b","name":"María Esteban Quintet","registered_at":"2026-06-12T10:01:11Z","symbol":"NIM0263754","token_address":"0x9c0ed0e9f2346e7bce27c2b46db915d5269b2fd9","type":"artist","uuid":"cd316e70-4f35-4101-9b03-8f471be4be5e"}
album: Voces Veladas, Vol. 1 - Un Homenaje a Letristas e Intérpretes de Jazz
  type: MusicAlbum
  date published: 2021-09-14
album: Something Cool
  type: MusicAlbum
  date published: 2022-07-08
album: Voces Veladas, Vol.2-Un Homenaje a Letristas e Intérpretes de Jazz
  type: MusicAlbum
  date published: 2022-07-22
  track: Something Cool
    type: MusicRecording
    duration: PT5M12S
    duration ms: 312160
    explicit: false
    by artist: María Esteban Quintet
    in album: Voces Veladas, Vol.2-Un Homenaje a Letristas e Intérpretes de Jazz
      type: MusicAlbum
      date published: 2022-07-22
    genre: vocal jazz
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    additional property: CopyrightStatus
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    additional property: OTSBitcoinBlockVerifyURL
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      value: https://blockstream.info/api/block-height/956822
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES18B2102849
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T18:48:28Z
    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 0x592cbfcf71c19580b1b27a7111f13c2ceac1d596b5a26420a66d133f8dbc05f3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ES18B2102849.
      date published: 2026-07-05T18:48:28Z
    audio: Something Cool
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 109.34
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.488
      additional property: Energy
        type: PropertyValue
        value: 0.08
      additional property: Speechiness
        type: PropertyValue
        value: 0.044
      additional property: Acousticness
        type: PropertyValue
        value: 0.967
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.316
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.119
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.331
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major