Leandro Cavalcante
type: MusicGroup
popularity: 2
followers: 120
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1eefd971b37e3a079182cfc5fcb83a475f9db476a5a18ece8456161581fd56d0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/176b135d-63fc-41a1-ae11-d4823ea9bde2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/176b135d-63fc-41a1-ae11-d4823ea9bde2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/176b135d-63fc-41a1-ae11-d4823ea9bde2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1eefd971b37e3a079182cfc5fcb83a475f9db476a5a18ece8456161581fd56d0","name":"Leandro Cavalcante","registered_at":"2026-06-15T21:37:35Z","symbol":"NIM0839389","token_address":"0xe00c39a6cb65a4446be5916abec0c7c3e18c0fd3","type":"artist","uuid":"176b135d-63fc-41a1-ae11-d4823ea9bde2"}
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 0x1eefd971b37e3a079182cfc5fcb83a475f9db476a5a18ece8456161581fd56d0. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/176b135d-63fc-41a1-ae11-d4823ea9bde2.json and https://artists.proofprofile.net/proofs/artist/176b135d-63fc-41a1-ae11-d4823ea9bde2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:39:24Z
  text: {"copyright_id":"0x1eefd971b37e3a079182cfc5fcb83a475f9db476a5a18ece8456161581fd56d0","name":"Leandro Cavalcante","registered_at":"2026-06-15T21:37:35Z","symbol":"NIM0839389","token_address":"0xe00c39a6cb65a4446be5916abec0c7c3e18c0fd3","type":"artist","uuid":"176b135d-63fc-41a1-ae11-d4823ea9bde2"}
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