Roberta Barce
type: MusicGroup
genre: bossa nova
popularity: 17
followers: 283
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa14e5e32e4275cee22785aaf6dd0d0d6c5b3c5678f23e429de2d99a9433368fd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953713
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953713
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/85c4d64b-05d4-454d-b79d-670c184f5e42.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/85c4d64b-05d4-454d-b79d-670c184f5e42.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/85c4d64b-05d4-454d-b79d-670c184f5e42
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T00:33:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa14e5e32e4275cee22785aaf6dd0d0d6c5b3c5678f23e429de2d99a9433368fd","name":"Roberta Barce","registered_at":"2026-06-14T18:31:14Z","symbol":"NIM0539545","token_address":"0x1e537dde0c8d8e839d9ea27a5d177d3af08c6669","type":"artist","uuid":"85c4d64b-05d4-454d-b79d-670c184f5e42"}
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 0xa14e5e32e4275cee22785aaf6dd0d0d6c5b3c5678f23e429de2d99a9433368fd. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/85c4d64b-05d4-454d-b79d-670c184f5e42.json and https://artists.proofprofile.net/proofs/artist/85c4d64b-05d4-454d-b79d-670c184f5e42.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T00:33:41Z
  text: {"copyright_id":"0xa14e5e32e4275cee22785aaf6dd0d0d6c5b3c5678f23e429de2d99a9433368fd","name":"Roberta Barce","registered_at":"2026-06-14T18:31:14Z","symbol":"NIM0539545","token_address":"0x1e537dde0c8d8e839d9ea27a5d177d3af08c6669","type":"artist","uuid":"85c4d64b-05d4-454d-b79d-670c184f5e42"}
album: Viver Pra Mim
  type: MusicAlbum
  date published: 2016-04-11
album: Por Ti Alma
  type: MusicAlbum
  date published: 2018-10-31
album: Desejo
  type: MusicAlbum
  date published: 2019-06-28
album: Ternura do Saber (Acústico)
  type: MusicAlbum
  date published: 2019-08-09
album: Ternura Do Saber
  type: MusicAlbum
  date published: 2019-08-09
album: A Voz do Coração
  type: MusicAlbum
  date published: 2020-02-28