Iván Castro
type: MusicGroup
description: Iván Castro (born 1967) is a former United States Army officer who continued serving on active duty in the Special Forces despite losing his eyesight. He was one of three blind active duty officers wh
popularity: 17
followers: 285
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerifyInstructions
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f703d4020947323c67a244fa667d7e2e6b4ecac5385f9a44332deba8e890d2. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac847b8e-7e98-4595-ae6e-7d4a162e271a.json and https://artists.proofprofile.net/proofs/artist/ac847b8e-7e98-4595-ae6e-7d4a162e271a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:57:35Z
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album: Mi Hogar
  type: MusicAlbum
  date published: 2024-02-09
album: Mi Hogar
  type: MusicAlbum
  date published: 2024-02-09
album: Me Niego a Olvidar
  type: MusicAlbum
  date published: 2024-05-20
album: Me Niego a Olvidar
  type: MusicAlbum
  date published: 2024-05-20
  track: Me Niego a Olvidar
    type: MusicRecording
    duration: PT4M17S
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    by artist: Iván Castro
    in album: Me Niego a Olvidar
      type: MusicAlbum
      date published: 2024-05-20
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    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T14:03:39Z
    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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013c67aa428c9edc54c97f4878750fcdf5da592b548f282937a84ae0e256f3f1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFW2431498.
      date published: 2026-07-04T14:03:39Z
    audio: Me Niego a Olvidar
      type: AudioObject
      additional property: Tempo (BPM)
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
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      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)
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        value: -6.023
      additional property: Key Name
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        value: B
      additional property: Mode Name
        type: PropertyValue
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album: Contigo Todo Quiero
  type: MusicAlbum
  date published: 2024-08-23
album: Contigo Todo Quiero
  type: MusicAlbum
  date published: 2024-08-23
album: Ángel Fracturado
  type: MusicAlbum
  date published: 2024-11-19
album: Pulso Acelerado
  type: MusicAlbum
  date published: 2025-02-28
album: Práctica y Teoría
  type: MusicAlbum
  date published: 2025-06-06
  track: Práctica y Teoría
    type: MusicRecording
    duration: PT3M48S
    duration ms: 228608
    explicit: false
    by artist: Iván Castro
    in album: Práctica y Teoría
      type: MusicAlbum
      date published: 2025-06-06
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    additional property: OTSTimestamp
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    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 0xf1d2ffc69c737a54a30323784a0e170cc958815fcd082767acd715f42bf35e47. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZNWV2598563.
      date published: 2026-07-18T00:52:36Z
    audio: Práctica y Teoría
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      additional property: Tempo (BPM)
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      additional property: Musical Key
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        value: 6
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      additional property: Time Signature
      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Time Signature
type: PropertyValue
value: 4

Danceability
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value: 0.441

Energy
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value: 0.432

Speechiness
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value: 0.033

Acousticness
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value: 0.656

Instrumentalness
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value: 0

Liveness
type: PropertyValue
value: 0.11

Valence (Positivity)
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value: 0.35

Loudness (dB)
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value: -7.352

Key Name
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value: F#

Mode Name
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value: Major