Maria Coma
type: MusicGroup
popularity: 11
followers: 5281
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbe732f205b228de7d57fb14ee5cd0100c6683ab21188a295b7434b299d6e3788
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953713
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953713
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83f769a5-2499-47a5-ac22-d663f85e6527.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/83f769a5-2499-47a5-ac22-d663f85e6527.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/83f769a5-2499-47a5-ac22-d663f85e6527
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T00:33:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbe732f205b228de7d57fb14ee5cd0100c6683ab21188a295b7434b299d6e3788","name":"Maria Coma","registered_at":"2026-06-14T18:18:48Z","symbol":"NIM0536588","token_address":"0xca4477f82dfa87b72be673aa35e6d4ea0c3a9e4b","type":"artist","uuid":"83f769a5-2499-47a5-ac22-d663f85e6527"}
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 0xbe732f205b228de7d57fb14ee5cd0100c6683ab21188a295b7434b299d6e3788. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83f769a5-2499-47a5-ac22-d663f85e6527.json and https://artists.proofprofile.net/proofs/artist/83f769a5-2499-47a5-ac22-d663f85e6527.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T00:33:41Z
  text: {"copyright_id":"0xbe732f205b228de7d57fb14ee5cd0100c6683ab21188a295b7434b299d6e3788","name":"Maria Coma","registered_at":"2026-06-14T18:18:48Z","symbol":"NIM0536588","token_address":"0xca4477f82dfa87b72be673aa35e6d4ea0c3a9e4b","type":"artist","uuid":"83f769a5-2499-47a5-ac22-d663f85e6527"}
album: U_mä
  type: MusicAlbum
  date published: 2007-12-16
album: Linòleum
  type: MusicAlbum
  date published: 2009
album: Linòleum
  type: MusicAlbum
  date published: 2009-04-13
album: Linòleum
  type: MusicAlbum
  date published: 2009-11-02
album: Linòleum en Concert
  type: MusicAlbum
  date published: 2010
album: Linòleum En Concert
  type: MusicAlbum
  date published: 2010-09-13
album: Linòleum en Concert
  type: MusicAlbum
  date published: 2011
album: Linòleum En Concert
  type: MusicAlbum
  date published: 2011-07-22
album: Magnòlia
  type: MusicAlbum
  date published: 2011-11-01
album: Magnòlia
  type: MusicAlbum
  date published: 2011-11-01
album: Celesta
  type: MusicAlbum
  date published: 2013-10-01
album: Celesta
  type: MusicAlbum
  date published: 2013-10-01
  track: L'últim Cercle Polar
    type: MusicRecording
    duration: PT4M38S
    duration ms: 278400
    explicit: false
    by artist: Maria Coma
    in album: Celesta
      type: MusicAlbum
      date published: 2013-10-01
    isrc code: ES5951304500
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T03:23:10+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xaeca52203613ce5153aa906ad0d3cd017b514fb2ffcad12f92b7dce41bd8ef9a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958650
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958650
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES5951304500
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T03:36:41Z
    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 0xaeca52203613ce5153aa906ad0d3cd017b514fb2ffcad12f92b7dce41bd8ef9a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ES5951304500.
      date published: 2026-07-19T03:36:41Z
    audio: L'últim Cercle Polar
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 128.733
      additional property: Musical Key
        type: PropertyValue
        value: 6
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.31
      additional property: Energy
        type: PropertyValue
        value: 0.239
      additional property: Speechiness
        type: PropertyValue
        value: 0.032
      additional property: Acousticness
        type: PropertyValue
        value: 0.843
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.845
      additional property: Liveness
        type: PropertyValue
        value: 0.099
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.074
      additional property: Loudness (dB)
        type: PropertyValue
        value: -13.443
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Celesta
  type: MusicAlbum
  date published: 2013-10-01
album: Celesta
  type: MusicAlbum
  date published: 2014-02-09
album: Crystalline
  type: MusicAlbum
  date published: 2023-11-24
album: Vocal Roots
  type: MusicAlbum
  date published: 2024-01-19
album: Fireflame
  type: MusicAlbum
  date published: 2024-03-08
album: Bodylandscape
  type: MusicAlbum
  date published: 2024-04-19
album: Vocal Roots
  type: MusicAlbum
  date published: 2024-04-26
album: Vocal Roots (Shoeg Remix)
  type: MusicAlbum
  date published: 2024-11-22
album: Pare (Live)
  type: MusicAlbum
  date published: 2024-12-20
album: Schöne Stille (Live)
  type: MusicAlbum
  date published: 2025-01-24