Guillermo Castro
type: MusicGroup
genre: bachata
popularity: 7
followers: 515
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe28778cfddfdaa803df4480e19f3f133bfe91793fd48b7169e79ccf4c92ccdcc
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/d57b1012-a643-4584-b0b5-ad8e230da50a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d57b1012-a643-4584-b0b5-ad8e230da50a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d57b1012-a643-4584-b0b5-ad8e230da50a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe28778cfddfdaa803df4480e19f3f133bfe91793fd48b7169e79ccf4c92ccdcc","name":"Guillermo Castro","registered_at":"2026-06-21T02:54:46Z","symbol":"NIM1797700","token_address":"0x2e3a9f3ae33d9b44325d39869dcfd05878d5a16b","type":"artist","uuid":"d57b1012-a643-4584-b0b5-ad8e230da50a"}
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 0xe28778cfddfdaa803df4480e19f3f133bfe91793fd48b7169e79ccf4c92ccdcc. 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/d57b1012-a643-4584-b0b5-ad8e230da50a.json and https://artists.proofprofile.net/proofs/artist/d57b1012-a643-4584-b0b5-ad8e230da50a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xe28778cfddfdaa803df4480e19f3f133bfe91793fd48b7169e79ccf4c92ccdcc","name":"Guillermo Castro","registered_at":"2026-06-21T02:54:46Z","symbol":"NIM1797700","token_address":"0x2e3a9f3ae33d9b44325d39869dcfd05878d5a16b","type":"artist","uuid":"d57b1012-a643-4584-b0b5-ad8e230da50a"}
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  type: MusicAlbum
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  type: MusicAlbum
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