Quatro a Zero
type: MusicGroup
genre: brazilian jazz
popularity: 2
followers: 585
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb2201d4e8ec89c9ed9da4e732487edeabf9c4b97343981c30fca779fb689bc6b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954043
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954043
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3f1da69a-a721-48c8-a0de-8f2e94f1784a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3f1da69a-a721-48c8-a0de-8f2e94f1784a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3f1da69a-a721-48c8-a0de-8f2e94f1784a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:15:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb2201d4e8ec89c9ed9da4e732487edeabf9c4b97343981c30fca779fb689bc6b","name":"Quatro a Zero","registered_at":"2026-06-16T11:37:51Z","symbol":"NIM1040008","token_address":"0xa4235dc7d8cd031000c3b4192124f5b13bfbc660","type":"artist","uuid":"3f1da69a-a721-48c8-a0de-8f2e94f1784a"}
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 0xb2201d4e8ec89c9ed9da4e732487edeabf9c4b97343981c30fca779fb689bc6b. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f1da69a-a721-48c8-a0de-8f2e94f1784a.json and https://artists.proofprofile.net/proofs/artist/3f1da69a-a721-48c8-a0de-8f2e94f1784a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T04:15:20Z
  text: {"copyright_id":"0xb2201d4e8ec89c9ed9da4e732487edeabf9c4b97343981c30fca779fb689bc6b","name":"Quatro a Zero","registered_at":"2026-06-16T11:37:51Z","symbol":"NIM1040008","token_address":"0xa4235dc7d8cd031000c3b4192124f5b13bfbc660","type":"artist","uuid":"3f1da69a-a721-48c8-a0de-8f2e94f1784a"}
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  type: MusicAlbum
  date published: 2004-01-01
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