Grupo João de Barro
type: MusicGroup
genre: forró
popularity: 3
followers: 42
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdf6c89cbdc268169083d63c53c72f4c19c86f9c49d5718661dd857952c4ab5ed
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b2929d29-052c-407c-84f0-f7694f97c493.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b2929d29-052c-407c-84f0-f7694f97c493.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b2929d29-052c-407c-84f0-f7694f97c493
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdf6c89cbdc268169083d63c53c72f4c19c86f9c49d5718661dd857952c4ab5ed","name":"Grupo João de Barro","registered_at":"2026-06-20T13:08:46Z","symbol":"NIM1617893","token_address":"0x7cf53299ef18e9141750771a40b64f60c29ee6a4","type":"artist","uuid":"b2929d29-052c-407c-84f0-f7694f97c493"}
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 0xdf6c89cbdc268169083d63c53c72f4c19c86f9c49d5718661dd857952c4ab5ed. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2929d29-052c-407c-84f0-f7694f97c493.json and https://artists.proofprofile.net/proofs/artist/b2929d29-052c-407c-84f0-f7694f97c493.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0xdf6c89cbdc268169083d63c53c72f4c19c86f9c49d5718661dd857952c4ab5ed","name":"Grupo João de Barro","registered_at":"2026-06-20T13:08:46Z","symbol":"NIM1617893","token_address":"0x7cf53299ef18e9141750771a40b64f60c29ee6a4","type":"artist","uuid":"b2929d29-052c-407c-84f0-f7694f97c493"}
album: Gafieira para Dominguinhos
  type: MusicAlbum
  date published: 2017-05-05