Leonardo Campos
type: MusicGroup
popularity: 4
followers: 1471
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x679d752d9b3d9e0ebe01ad0214f429f9689b9ba5c3b99987789dddf63d694c7b
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/e018e962-d6aa-4f1f-bdd2-baaf57fefd56.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/e018e962-d6aa-4f1f-bdd2-baaf57fefd56.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/e018e962-d6aa-4f1f-bdd2-baaf57fefd56
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x679d752d9b3d9e0ebe01ad0214f429f9689b9ba5c3b99987789dddf63d694c7b","name":"Leonardo Campos","registered_at":"2026-06-21T06:22:07Z","symbol":"NIM1847088","token_address":"0x1106f2a6d6cdf4f6ec7645ec7ead5b63e52d3728","type":"artist","uuid":"e018e962-d6aa-4f1f-bdd2-baaf57fefd56"}
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 0x679d752d9b3d9e0ebe01ad0214f429f9689b9ba5c3b99987789dddf63d694c7b. 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/e018e962-d6aa-4f1f-bdd2-baaf57fefd56.json and https://artists.proofprofile.net/proofs/artist/e018e962-d6aa-4f1f-bdd2-baaf57fefd56.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x679d752d9b3d9e0ebe01ad0214f429f9689b9ba5c3b99987789dddf63d694c7b","name":"Leonardo Campos","registered_at":"2026-06-21T06:22:07Z","symbol":"NIM1847088","token_address":"0x1106f2a6d6cdf4f6ec7645ec7ead5b63e52d3728","type":"artist","uuid":"e018e962-d6aa-4f1f-bdd2-baaf57fefd56"}
album: Imerso
  type: MusicAlbum
  date published: 2014-02-14
album: Quem São Estes?
  type: MusicAlbum
  date published: 2015-11-13
album: Precursores
  type: MusicAlbum
  date published: 2018-03-19
album: Voz e Violão
  type: MusicAlbum
  date published: 2018-11-02