El Preso
type: MusicGroup
description: "El Preso" (translation "the prisoner") is a song recorded by Fruko y sus Tesos. It was released in 1975 with vocals by Wilson Saoko. The song was composed by the band's percussionist Álvaro Velásquez
popularity: 7
followers: 7
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf91217625ac991a90e975c6f4253e55b3faa98042431a9e70688fb2d9c771037
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b2dba3b2-ff9a-4dd8-a10e-17a599817f27.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b2dba3b2-ff9a-4dd8-a10e-17a599817f27.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b2dba3b2-ff9a-4dd8-a10e-17a599817f27
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf91217625ac991a90e975c6f4253e55b3faa98042431a9e70688fb2d9c771037","name":"El Preso","registered_at":"2026-06-20T13:07:50Z","symbol":"NIM1618599","token_address":"0xe6a03bde0e33a48aba74fff7e80e7d2d84822f9f","type":"artist","uuid":"b2dba3b2-ff9a-4dd8-a10e-17a599817f27"}
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 0xf91217625ac991a90e975c6f4253e55b3faa98042431a9e70688fb2d9c771037. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2dba3b2-ff9a-4dd8-a10e-17a599817f27.json and https://artists.proofprofile.net/proofs/artist/b2dba3b2-ff9a-4dd8-a10e-17a599817f27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0xf91217625ac991a90e975c6f4253e55b3faa98042431a9e70688fb2d9c771037","name":"El Preso","registered_at":"2026-06-20T13:07:50Z","symbol":"NIM1618599","token_address":"0xe6a03bde0e33a48aba74fff7e80e7d2d84822f9f","type":"artist","uuid":"b2dba3b2-ff9a-4dd8-a10e-17a599817f27"}