CÉSAR LASTRA
type: MusicGroup
popularity: 2
followers: 70
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa51b066956544f8b533216bc66ee4e723b35d095de3c6824f57dbd5200ef1b36
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954693
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954693
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7d16ef6-3ae9-4057-877f-027ab482bc06.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e7d16ef6-3ae9-4057-877f-027ab482bc06.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e7d16ef6-3ae9-4057-877f-027ab482bc06
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T11:50:32Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa51b066956544f8b533216bc66ee4e723b35d095de3c6824f57dbd5200ef1b36","name":"CÉSAR LASTRA","registered_at":"2026-06-21T09:01:17Z","symbol":"NIM1882673","token_address":"0x1bfc0f01b5b2fcd82e67dbbd0e75942d17ff0443","type":"artist","uuid":"e7d16ef6-3ae9-4057-877f-027ab482bc06"}
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 0xa51b066956544f8b533216bc66ee4e723b35d095de3c6824f57dbd5200ef1b36. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7d16ef6-3ae9-4057-877f-027ab482bc06.json and https://artists.proofprofile.net/proofs/artist/e7d16ef6-3ae9-4057-877f-027ab482bc06.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
  text: {"copyright_id":"0xa51b066956544f8b533216bc66ee4e723b35d095de3c6824f57dbd5200ef1b36","name":"CÉSAR LASTRA","registered_at":"2026-06-21T09:01:17Z","symbol":"NIM1882673","token_address":"0x1bfc0f01b5b2fcd82e67dbbd0e75942d17ff0443","type":"artist","uuid":"e7d16ef6-3ae9-4057-877f-027ab482bc06"}
album: Alza tus manos
  type: MusicAlbum
  date published: 2003
album: Mientras tanto
  type: MusicAlbum
  date published: 2005
album: Hasta luego
  type: MusicAlbum
  date published: 2009
  track: Hasta luego
    type: MusicRecording
    duration: PT4M22S
    duration ms: 262791
    explicit: false
    by artist: CÉSAR LASTRA
    in album: Hasta luego
      type: MusicAlbum
      date published: 2009
    isrc code: CAENV2267031
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T09:14:41+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x7dedb932f4efda400e8f249e24110e0adff3a075d1769eba6324666e7d758d9d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956772
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956772
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAENV2267031
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T10:01:46Z
    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 0x7dedb932f4efda400e8f249e24110e0adff3a075d1769eba6324666e7d758d9d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAENV2267031.
      date published: 2026-07-05T10:01:46Z
    audio: Hasta luego
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 152.019
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.634
      additional property: Energy
        type: PropertyValue
        value: 0.59
      additional property: Speechiness
        type: PropertyValue
        value: 0.03
      additional property: Acousticness
        type: PropertyValue
        value: 0.039
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.069
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.534
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.107
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Ven
  type: MusicAlbum
  date published: 2019
album: Junto a ti
  type: MusicAlbum
  date published: 2022-05-05
album: Noche de paz
  type: MusicAlbum
  date published: 2022-12-19
album: En Navidad
  type: MusicAlbum
  date published: 2022-12-22
album: Si supieras (Versión acústica)
  type: MusicAlbum
  date published: 2023-05-11