Carlos Contreras
type: MusicGroup
description: Carlos Contreras may refer to: Sports Football Carlos Contreras (footballer, born 1938) (1938–2020), Chilean football defender Carlos Contreras (footballer, born 1972), Venezuelan footballer Carlo
popularity: 21
followers: 2836
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x63ba588ca02ac5801883390a56bc76b7bb9b37599c621bdeb4a155a7bc072f5a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
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/25e01631-47c2-491e-92e0-33f7217bdc82.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/25e01631-47c2-491e-92e0-33f7217bdc82.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/25e01631-47c2-491e-92e0-33f7217bdc82
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x63ba588ca02ac5801883390a56bc76b7bb9b37599c621bdeb4a155a7bc072f5a","name":"Carlos Contreras","registered_at":"2026-06-11T14:29:04Z","symbol":"NIM0049294","token_address":"0x3f497956dd742b23b8c30cbcd32b492114927f87","type":"artist","uuid":"25e01631-47c2-491e-92e0-33f7217bdc82"}
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ba588ca02ac5801883390a56bc76b7bb9b37599c621bdeb4a155a7bc072f5a. 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/25e01631-47c2-491e-92e0-33f7217bdc82.json and https://artists.proofprofile.net/proofs/artist/25e01631-47c2-491e-92e0-33f7217bdc82.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x63ba588ca02ac5801883390a56bc76b7bb9b37599c621bdeb4a155a7bc072f5a","name":"Carlos Contreras","registered_at":"2026-06-11T14:29:04Z","symbol":"NIM0049294","token_address":"0x3f497956dd742b23b8c30cbcd32b492114927f87","type":"artist","uuid":"25e01631-47c2-491e-92e0-33f7217bdc82"}
album: Margarita
  type: MusicAlbum
  date published: 2017-07-17
  track: Al Perder un Amor
    type: MusicRecording
    duration: PT2M32S
    duration ms: 152200
    explicit: false
    by artist: Carlos Contreras
    in album: Margarita
      type: MusicAlbum
      date published: 2017-07-17
    isrc code: ES71G1821381
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T06:27:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5a1f1bff4af22fc3428b16626f1ccc16e5e1f3fe7efb2e63b2b6d580ea6734b2
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958256
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958256
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1821381
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T07:22:18Z
    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 0x5a1f1bff4af22fc3428b16626f1ccc16e5e1f3fe7efb2e63b2b6d580ea6734b2. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ES71G1821381.
      date published: 2026-07-16T07:22:18Z
    audio: Al Perder un Amor
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 107.231
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.494
      additional property: Energy
        type: PropertyValue
        value: 0.491
      additional property: Speechiness
        type: PropertyValue
        value: 0.044
      additional property: Acousticness
        type: PropertyValue
        value: 0.548
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.008
      additional property: Liveness
        type: PropertyValue
        value: 0.112
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.452
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.251
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major