ML 21
type: MusicGroup
popularity: 8
followers: 538
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd7c657d8ce471029e850105c04d09ea4e05f9cccb2bcdec6dffbaafcf42b8da4
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8981f75b-73f6-478d-bb4c-d96aaa290b65.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/8981f75b-73f6-478d-bb4c-d96aaa290b65.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/8981f75b-73f6-478d-bb4c-d96aaa290b65
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd7c657d8ce471029e850105c04d09ea4e05f9cccb2bcdec6dffbaafcf42b8da4","name":"ML 21","registered_at":"2026-06-17T13:59:13Z","symbol":"NIM1417155","token_address":"0xb5921812b3b2af9b739100891aed043930fd0ac9","type":"artist","uuid":"8981f75b-73f6-478d-bb4c-d96aaa290b65"}
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 0xd7c657d8ce471029e850105c04d09ea4e05f9cccb2bcdec6dffbaafcf42b8da4. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8981f75b-73f6-478d-bb4c-d96aaa290b65.json and https://artists.proofprofile.net/proofs/artist/8981f75b-73f6-478d-bb4c-d96aaa290b65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0xd7c657d8ce471029e850105c04d09ea4e05f9cccb2bcdec6dffbaafcf42b8da4","name":"ML 21","registered_at":"2026-06-17T13:59:13Z","symbol":"NIM1417155","token_address":"0xb5921812b3b2af9b739100891aed043930fd0ac9","type":"artist","uuid":"8981f75b-73f6-478d-bb4c-d96aaa290b65"}
album: Vidigal
  type: MusicAlbum
  date published: 2019-11-11
  track: Vidigal
    type: MusicRecording
    duration: PT2M30S
    duration ms: 150447
    explicit: false
    by artist: ML 21
    in album: Vidigal
      type: MusicAlbum
      date published: 2019-11-11
    isrc code: BXQ5I1900001
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T01:33:27+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x55e26d9384004d0a6531d901db6524be67a1a11e21b54c7c3027da968a777c6c
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956639
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956639
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXQ5I1900001
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-04T11:19:20Z
    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 0x55e26d9384004d0a6531d901db6524be67a1a11e21b54c7c3027da968a777c6c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BXQ5I1900001.
      date published: 2026-07-04T11:19:20Z
    audio: Vidigal
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 133.999
      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: 0.766
      additional property: Energy
        type: PropertyValue
        value: 0.629
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.131
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.099
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.818
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.004
      additional property: Key Name
        type: PropertyValue
        value: F#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Vidigal
  type: MusicAlbum
  date published: 2019-11-11
album: Madrugada Inteira
  type: MusicAlbum
  date published: 2020-01-17
album: Madrugada Inteira
  type: MusicAlbum
  date published: 2020-01-17
album: VAI
  type: MusicAlbum
  date published: 2020-03-06
album: VAI
  type: MusicAlbum
  date published: 2020-03-06
album: MAIS QUE SÓ UMA NOITE
  type: MusicAlbum
  date published: 2020-12-13
album: MAIS QUE SÓ UMA NOITE
  type: MusicAlbum
  date published: 2020-12-13
  track: Mais Que Só Uma Noite
    type: MusicRecording
    duration: PT2M50S
    duration ms: 170624
    explicit: false
    by artist: ML 21
    in album: MAIS QUE SÓ UMA NOITE
      type: MusicAlbum
      date published: 2020-12-13
    isrc code: BX2UA2000036
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T08:45:59+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x470bd7fe159cc5570e6d1010d7da31ccf2988ef744ea4b1876622e521d8e4183
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958987
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958987
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX2UA2000036
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T09:04:56Z
    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 0x470bd7fe159cc5570e6d1010d7da31ccf2988ef744ea4b1876622e521d8e4183. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/BX2UA2000036.
      date published: 2026-07-21T09:04:56Z
    audio: Mais Que Só Uma Noite
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 128.067
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.775
      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
album: Ela
album: Jogo
album: Saudade

Energy
type: PropertyValue
value: 0.479

Speechiness
type: PropertyValue
value: 0.053

Acousticness
type: PropertyValue
value: 0.591

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.106

Valence (Positivity)
type: PropertyValue
value: 0.722

Loudness (dB)
type: PropertyValue
value: -8.203

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Minor

Ela
type: MusicAlbum
date published: 2021-03-26

Jogo
type: MusicAlbum
date published: 2021-08-13

Saudade
type: MusicAlbum
date published: 2022-05-06