Márcia Helena e Massu
type: MusicGroup
popularity: 4
followers: 174
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc7bfb63a31f687e65304384cf28d39980f1e7a8875cc34612442fb131f3b8717
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954031
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954031
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3af18e05-afcb-4b48-9272-17043077eddb.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3af18e05-afcb-4b48-9272-17043077eddb.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3af18e05-afcb-4b48-9272-17043077eddb
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T01:43:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc7bfb63a31f687e65304384cf28d39980f1e7a8875cc34612442fb131f3b8717","name":"Márcia Helena e Massu","registered_at":"2026-06-16T10:06:29Z","symbol":"NIM1018205","token_address":"0x3cd8fd768852efb290009e46b81b4ff6bfb3207e","type":"artist","uuid":"3af18e05-afcb-4b48-9272-17043077eddb"}
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 0xc7bfb63a31f687e65304384cf28d39980f1e7a8875cc34612442fb131f3b8717. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3af18e05-afcb-4b48-9272-17043077eddb.json and https://artists.proofprofile.net/proofs/artist/3af18e05-afcb-4b48-9272-17043077eddb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xc7bfb63a31f687e65304384cf28d39980f1e7a8875cc34612442fb131f3b8717","name":"Márcia Helena e Massu","registered_at":"2026-06-16T10:06:29Z","symbol":"NIM1018205","token_address":"0x3cd8fd768852efb290009e46b81b4ff6bfb3207e","type":"artist","uuid":"3af18e05-afcb-4b48-9272-17043077eddb"}
album: Amores Falsos
  type: MusicAlbum
  date published: 2024-03-22
  track: Amores Falsos
    type: MusicRecording
    duration: PT2M56S
    duration ms: 176984
    explicit: false
    by artist: Márcia Helena e Massu
    in album: Amores Falsos
      type: MusicAlbum
      date published: 2024-03-22
    isrc code: BXGC72400015
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T10:06:43+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x3b0e5af705d4f58d59c3747492000917573237b4871840bf59f63b3d3412c701
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958276
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958276
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXGC72400015
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T13:05:29Z
    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 0x3b0e5af705d4f58d59c3747492000917573237b4871840bf59f63b3d3412c701. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:05:29Z), 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/BXGC72400015.
      date published: 2026-07-16T13:05:29Z
    audio: Amores Falsos
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 144.009
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.647
      additional property: Energy
        type: PropertyValue
        value: 0.907
      additional property: Speechiness
        type: PropertyValue
        value: 0.04
      additional property: Acousticness
        type: PropertyValue
        value: 0.476
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.357
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.841
      additional property: Loudness (dB)
        type: PropertyValue
        value: -2.642
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Minor