Léo & Vacari
type: MusicGroup
popularity: 2
followers: 193
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa787a845b1741daafd65bcf5e7929a1122c9a63865d96e5901c6f39a7597c819
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953932
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953932
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1f29e942-6ee1-47a0-958e-955b97fb1630.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1f29e942-6ee1-47a0-958e-955b97fb1630.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1f29e942-6ee1-47a0-958e-955b97fb1630
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa787a845b1741daafd65bcf5e7929a1122c9a63865d96e5901c6f39a7597c819","name":"Léo & Vacari","registered_at":"2026-06-16T00:24:59Z","symbol":"NIM0879334","token_address":"0x1d756c0b1db1473ca0970ff98b277b5870357a8d","type":"artist","uuid":"1f29e942-6ee1-47a0-958e-955b97fb1630"}
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 0xa787a845b1741daafd65bcf5e7929a1122c9a63865d96e5901c6f39a7597c819. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f29e942-6ee1-47a0-958e-955b97fb1630.json and https://artists.proofprofile.net/proofs/artist/1f29e942-6ee1-47a0-958e-955b97fb1630.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:10:43Z
  text: {"copyright_id":"0xa787a845b1741daafd65bcf5e7929a1122c9a63865d96e5901c6f39a7597c819","name":"Léo & Vacari","registered_at":"2026-06-16T00:24:59Z","symbol":"NIM0879334","token_address":"0x1d756c0b1db1473ca0970ff98b277b5870357a8d","type":"artist","uuid":"1f29e942-6ee1-47a0-958e-955b97fb1630"}
album: Na Cara e na "Korage" (Ao Vivo)
  type: MusicAlbum
  date published: 2022-05-30
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  type: MusicAlbum
  date published: 2025-06-03
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  type: MusicAlbum
  date published: 2025-06-27
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  type: MusicAlbum
  date published: 2025-10-16