Maria João
type: MusicGroup
popularity: 3
followers: 548
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4f9aaf0c2dc9b45ed1567ed3d1c3ad29ee14d54eb397aa9453bfcf25388f6940
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c9e7cfac-eaaf-4984-8462-a56d910bc985.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c9e7cfac-eaaf-4984-8462-a56d910bc985.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c9e7cfac-eaaf-4984-8462-a56d910bc985
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4f9aaf0c2dc9b45ed1567ed3d1c3ad29ee14d54eb397aa9453bfcf25388f6940","name":"Maria João","registered_at":"2026-06-20T22:34:57Z","symbol":"NIM1734109","token_address":"0x035cf72b689e37f06ada3e8d5021c13de67fde8a","type":"artist","uuid":"c9e7cfac-eaaf-4984-8462-a56d910bc985"}
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 0x4f9aaf0c2dc9b45ed1567ed3d1c3ad29ee14d54eb397aa9453bfcf25388f6940. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9e7cfac-eaaf-4984-8462-a56d910bc985.json and https://artists.proofprofile.net/proofs/artist/c9e7cfac-eaaf-4984-8462-a56d910bc985.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x4f9aaf0c2dc9b45ed1567ed3d1c3ad29ee14d54eb397aa9453bfcf25388f6940","name":"Maria João","registered_at":"2026-06-20T22:34:57Z","symbol":"NIM1734109","token_address":"0x035cf72b689e37f06ada3e8d5021c13de67fde8a","type":"artist","uuid":"c9e7cfac-eaaf-4984-8462-a56d910bc985"}
album: Tudo o Que Quis
  type: MusicAlbum
  date published: 2025-03-28
  track: Tudo o Que Quis
    type: MusicRecording
    duration: PT2M10S
    duration ms: 130285
    explicit: false
    by artist: Maria João
    in album: Tudo o Que Quis
      type: MusicAlbum
      date published: 2025-03-28
    isrc code: QZGLS2563477
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-04T13:10:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2265d0836ef8941a44c30364144f136235853503cfb0ca06e6157e3c7b59c29f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956725
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956725
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGLS2563477
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T01:12:41Z
    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 0x2265d0836ef8941a44c30364144f136235853503cfb0ca06e6157e3c7b59c29f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZGLS2563477.
      date published: 2026-07-05T01:12:41Z
    audio: Tudo o Que Quis
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 105.036
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.934
      additional property: Energy
        type: PropertyValue
        value: 0.537
      additional property: Speechiness
        type: PropertyValue
        value: 0.194
      additional property: Acousticness
        type: PropertyValue
        value: 0.306
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.393
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.521
      additional property: Loudness (dB)
        type: PropertyValue
        value: -10.348
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major