Marcia Barros
type: MusicGroup
genre: bossa nova
popularity: 2
followers: 146
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe0470bcf9c7f57a693b0c29342439d3f6796cfbeacc55f2875452a137bcf1295
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/b551a3b2-8bdf-42ec-8982-1ecf0a780919.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b551a3b2-8bdf-42ec-8982-1ecf0a780919.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b551a3b2-8bdf-42ec-8982-1ecf0a780919
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe0470bcf9c7f57a693b0c29342439d3f6796cfbeacc55f2875452a137bcf1295","name":"Marcia Barros","registered_at":"2026-06-20T15:01:13Z","symbol":"NIM1635484","token_address":"0x740d8f02a1b4c7516d87eb2e919460bffbffd07a","type":"artist","uuid":"b551a3b2-8bdf-42ec-8982-1ecf0a780919"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0470bcf9c7f57a693b0c29342439d3f6796cfbeacc55f2875452a137bcf1295. 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/b551a3b2-8bdf-42ec-8982-1ecf0a780919.json and https://artists.proofprofile.net/proofs/artist/b551a3b2-8bdf-42ec-8982-1ecf0a780919.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xe0470bcf9c7f57a693b0c29342439d3f6796cfbeacc55f2875452a137bcf1295","name":"Marcia Barros","registered_at":"2026-06-20T15:01:13Z","symbol":"NIM1635484","token_address":"0x740d8f02a1b4c7516d87eb2e919460bffbffd07a","type":"artist","uuid":"b551a3b2-8bdf-42ec-8982-1ecf0a780919"}
album: Apresentam Xutos e Pontapés N’ Bossa Nova
  type: MusicAlbum
  date published: 2013-06-24
album: Marcia In Bossa
  type: MusicAlbum
  date published: 2021-04-20
album: Yo Soy Latina
  type: MusicAlbum
  date published: 2021-08-16
album: Quinteto Marcia Barros
  type: MusicAlbum
  date published: 2023-07-31
album: A Little Tear
  type: MusicAlbum
  date published: 2024-07-08
album: The Autumn Leaves
  type: MusicAlbum
  date published: 2024-09-13
album: Paraíso Tropical
  type: MusicAlbum
  date published: 2024-12-13