Marcia Rocha
type: MusicGroup
genre: brega
genre: tecnobrega
popularity: 2
followers: 54
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2ddae0ea16b9e22e017c37a270e51bc6a3e2c1894534e98ff7701cd888dd9f5c
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/3ad6862c-661b-4bbc-a74c-113ff843b0ca.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3ad6862c-661b-4bbc-a74c-113ff843b0ca.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3ad6862c-661b-4bbc-a74c-113ff843b0ca
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T01:43:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2ddae0ea16b9e22e017c37a270e51bc6a3e2c1894534e98ff7701cd888dd9f5c","name":"Marcia Rocha","registered_at":"2026-06-16T10:00:05Z","symbol":"NIM1016680","token_address":"0x03da44ea0a27bf305d8f13258cd15ca0e7ea2996","type":"artist","uuid":"3ad6862c-661b-4bbc-a74c-113ff843b0ca"}
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 0x2ddae0ea16b9e22e017c37a270e51bc6a3e2c1894534e98ff7701cd888dd9f5c. 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/3ad6862c-661b-4bbc-a74c-113ff843b0ca.json and https://artists.proofprofile.net/proofs/artist/3ad6862c-661b-4bbc-a74c-113ff843b0ca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x2ddae0ea16b9e22e017c37a270e51bc6a3e2c1894534e98ff7701cd888dd9f5c","name":"Marcia Rocha","registered_at":"2026-06-16T10:00:05Z","symbol":"NIM1016680","token_address":"0x03da44ea0a27bf305d8f13258cd15ca0e7ea2996","type":"artist","uuid":"3ad6862c-661b-4bbc-a74c-113ff843b0ca"}
album: Profano
  type: MusicAlbum
  date published: 2001-11-01
  track: Nosso Romance
    type: MusicRecording
    duration: PT3M31S
    duration ms: 211066
    explicit: false
    by artist: Marcia Rocha
    in album: Profano
      type: MusicAlbum
      date published: 2001-11-01
    genre: brega
    genre: tecnobrega
    isrc code: BRAPI0100607
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-06T06:12:02+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x9d1e7ecb40ec26ebe408384b5cb5c135c0c3e403ff05e65dc38d092a13b500b9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956891
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956891
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRAPI0100607
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T07:16:32Z
    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 0x9d1e7ecb40ec26ebe408384b5cb5c135c0c3e403ff05e65dc38d092a13b500b9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BRAPI0100607.
      date published: 2026-07-06T07:16:32Z
    audio: Nosso Romance
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 74.968
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.669
      additional property: Energy
        type: PropertyValue
        value: 0.692
      additional property: Speechiness
        type: PropertyValue
        value: 0.033
      additional property: Acousticness
        type: PropertyValue
        value: 0.306
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.049
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.956
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.361
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major