Antonio Carlos Bonfa
type: MusicGroup
genre: bossa nova
popularity: 6
followers: 170
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe70fb990927ce363093f51fcf243031f6efe93862d2d6728c042419239e738d0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954000
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954000
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/311bb9d6-1836-4af4-b179-94e573d8f9fd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/311bb9d6-1836-4af4-b179-94e573d8f9fd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/311bb9d6-1836-4af4-b179-94e573d8f9fd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:18:46Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe70fb990927ce363093f51fcf243031f6efe93862d2d6728c042419239e738d0","name":"Antonio Carlos Bonfa","registered_at":"2026-06-16T06:57:29Z","symbol":"NIM0973081","token_address":"0xd94db5b3e2f3e78d670fa5e4a23996acd8d1183a","type":"artist","uuid":"311bb9d6-1836-4af4-b179-94e573d8f9fd"}
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 0xe70fb990927ce363093f51fcf243031f6efe93862d2d6728c042419239e738d0. 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/311bb9d6-1836-4af4-b179-94e573d8f9fd.json and https://artists.proofprofile.net/proofs/artist/311bb9d6-1836-4af4-b179-94e573d8f9fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xe70fb990927ce363093f51fcf243031f6efe93862d2d6728c042419239e738d0","name":"Antonio Carlos Bonfa","registered_at":"2026-06-16T06:57:29Z","symbol":"NIM0973081","token_address":"0xd94db5b3e2f3e78d670fa5e4a23996acd8d1183a","type":"artist","uuid":"311bb9d6-1836-4af4-b179-94e573d8f9fd"}
album: Desafinado and Other Brazilian Hits
  type: MusicAlbum
  date published: 1999