Javier Crespo
type: MusicGroup
description: Javier Crespo is a Spanish SB9 classified swimmer who has represented Spain at the 2004, 2008 and 2012 Summer Paralympics. Personal Crespo is from Madrid. In September 2012, he was honored at his
popularity: 6
followers: 1279
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1d95e2566da9a9723a5d98844d989787501f847ca814f0c29648bdc420e76762
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/58584249-8aba-4a39-af92-e647862af302.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/58584249-8aba-4a39-af92-e647862af302.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/58584249-8aba-4a39-af92-e647862af302
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1d95e2566da9a9723a5d98844d989787501f847ca814f0c29648bdc420e76762","name":"Javier Crespo","registered_at":"2026-06-16T20:24:48Z","symbol":"NIM1165727","token_address":"0xaac5b45ae39edd5850589040a3a5be3d939ff3ac","type":"artist","uuid":"58584249-8aba-4a39-af92-e647862af302"}
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 0x1d95e2566da9a9723a5d98844d989787501f847ca814f0c29648bdc420e76762. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58584249-8aba-4a39-af92-e647862af302.json and https://artists.proofprofile.net/proofs/artist/58584249-8aba-4a39-af92-e647862af302.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x1d95e2566da9a9723a5d98844d989787501f847ca814f0c29648bdc420e76762","name":"Javier Crespo","registered_at":"2026-06-16T20:24:48Z","symbol":"NIM1165727","token_address":"0xaac5b45ae39edd5850589040a3a5be3d939ff3ac","type":"artist","uuid":"58584249-8aba-4a39-af92-e647862af302"}