Leàndro Máttos
type: MusicGroup
genre: pagode
genre: samba
popularity: 32
followers: 157
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1b1ed780af9d65a585e927a55ec5457c4b30e6e63dfb410453e7591b044794aa
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3fe8f971-3ed5-4443-bc81-a33b6d070c17.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3fe8f971-3ed5-4443-bc81-a33b6d070c17.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3fe8f971-3ed5-4443-bc81-a33b6d070c17
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1b1ed780af9d65a585e927a55ec5457c4b30e6e63dfb410453e7591b044794aa","name":"Leàndro Máttos","registered_at":"2026-06-11T17:34:47Z","symbol":"NIM0083895","token_address":"0x0ace357ceafaea0f1b5528113f94165ed0b7ea36","type":"artist","uuid":"3fe8f971-3ed5-4443-bc81-a33b6d070c17"}
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 0x1b1ed780af9d65a585e927a55ec5457c4b30e6e63dfb410453e7591b044794aa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3fe8f971-3ed5-4443-bc81-a33b6d070c17.json and https://artists.proofprofile.net/proofs/artist/3fe8f971-3ed5-4443-bc81-a33b6d070c17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:28:13Z
  text: {"copyright_id":"0x1b1ed780af9d65a585e927a55ec5457c4b30e6e63dfb410453e7591b044794aa","name":"Leàndro Máttos","registered_at":"2026-06-11T17:34:47Z","symbol":"NIM0083895","token_address":"0x0ace357ceafaea0f1b5528113f94165ed0b7ea36","type":"artist","uuid":"3fe8f971-3ed5-4443-bc81-a33b6d070c17"}
album: Sensual Sabor
  type: MusicAlbum
  date published: 2023-06-23
album: Mabet
  type: MusicAlbum
  date published: 2023-08-25
album: Minha Mãe E Eu
  type: MusicAlbum
  date published: 2025-07-04