Marquinhos Café
type: MusicGroup
genre: forró
popularity: 5
followers: 81
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x27a6dbd471452aeeb73493104ca5e0216f3e79436e5b708dc25ae3c91ed9f648
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/db131979-eb95-45d3-b7a1-39c4f028cc70.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/db131979-eb95-45d3-b7a1-39c4f028cc70.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/db131979-eb95-45d3-b7a1-39c4f028cc70
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x27a6dbd471452aeeb73493104ca5e0216f3e79436e5b708dc25ae3c91ed9f648","name":"Marquinhos Café","registered_at":"2026-06-21T04:50:15Z","symbol":"NIM1821277","token_address":"0xe943278393e249c9900d2b59ab4c8b73257eac32","type":"artist","uuid":"db131979-eb95-45d3-b7a1-39c4f028cc70"}
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 0x27a6dbd471452aeeb73493104ca5e0216f3e79436e5b708dc25ae3c91ed9f648. 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/db131979-eb95-45d3-b7a1-39c4f028cc70.json and https://artists.proofprofile.net/proofs/artist/db131979-eb95-45d3-b7a1-39c4f028cc70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x27a6dbd471452aeeb73493104ca5e0216f3e79436e5b708dc25ae3c91ed9f648","name":"Marquinhos Café","registered_at":"2026-06-21T04:50:15Z","symbol":"NIM1821277","token_address":"0xe943278393e249c9900d2b59ab4c8b73257eac32","type":"artist","uuid":"db131979-eb95-45d3-b7a1-39c4f028cc70"}
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