Marina Calvo
type: MusicGroup
popularity: 2
followers: 292
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x27cca1aaebb8837f36c665534bf03372e211c91b3e4410e5f2a976e43c767a87
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954650
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954650
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db794474-c1cf-44ff-b37e-d5d0009cb803.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db794474-c1cf-44ff-b37e-d5d0009cb803.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/db794474-c1cf-44ff-b37e-d5d0009cb803
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:51:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x27cca1aaebb8837f36c665534bf03372e211c91b3e4410e5f2a976e43c767a87","name":"Marina Calvo","registered_at":"2026-06-21T04:30:10Z","symbol":"NIM1820215","token_address":"0x1dd232dc0231d367ee80dc03180a4d14d65c44fb","type":"artist","uuid":"db794474-c1cf-44ff-b37e-d5d0009cb803"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27cca1aaebb8837f36c665534bf03372e211c91b3e4410e5f2a976e43c767a87. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/db794474-c1cf-44ff-b37e-d5d0009cb803.json and https://artists.proofprofile.net/proofs/artist/db794474-c1cf-44ff-b37e-d5d0009cb803.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T04:51:12Z
  text: {"copyright_id":"0x27cca1aaebb8837f36c665534bf03372e211c91b3e4410e5f2a976e43c767a87","name":"Marina Calvo","registered_at":"2026-06-21T04:30:10Z","symbol":"NIM1820215","token_address":"0x1dd232dc0231d367ee80dc03180a4d14d65c44fb","type":"artist","uuid":"db794474-c1cf-44ff-b37e-d5d0009cb803"}
album: Shy Boy
  type: MusicAlbum
  date published: 2015-10-23
album: Shy Boy (Marco Batista Remixes)
  type: MusicAlbum
  date published: 2016-01-01
album: Left To Right
  type: MusicAlbum
  date published: 2018-03-31
album: Fire
  type: MusicAlbum
  date published: 2019-03-10
album: Words
  type: MusicAlbum
  date published: 2019-09-30
  track: Words
    type: MusicRecording
    duration: PT3M9S
    duration ms: 189000
    explicit: false
    by artist: Marina Calvo
    in album: Words
      type: MusicAlbum
      date published: 2019-09-30
    isrc code: ES71G1937840
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T22:02:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x36bba2e718084c20db6257ce496e453e61637a270b2ac30304f59b09d386d23c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959069
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959069
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES71G1937840
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T01:02:36Z
    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 0x36bba2e718084c20db6257ce496e453e61637a270b2ac30304f59b09d386d23c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:02:36Z), 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/ES71G1937840.
      date published: 2026-07-22T01:02:36Z
    audio: Words
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 175.887
      additional property: Musical Key
        type: PropertyValue
        value: 8
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.51
      additional property: Energy
        type: PropertyValue
        value: 0.545
      additional property: Speechiness
        type: PropertyValue
        value: 0.395
      additional property: Acousticness
        type: PropertyValue
        value: 0.297
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.1
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.41
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.375
      additional property: Key Name
        type: PropertyValue
        value: Ab
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: King Of Persia
  type: MusicAlbum
  date published: 2019-09-30