Víctor Lavallén
type: MusicGroup
genre: tango
description: Víctor Luis Lavallén (18 December 1935) is a bandoneonist, orchestra conductor, composer, and tango arranger. His professional career started in the 1950s. In November 2024, he was declared a "Distin
popularity: 6
followers: 470
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xbb5727c417b5d7bd81be696ff1291f913e212f01d6550243df81ba1e52b06b5f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954573
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954573
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b52f8337-030f-4985-ba1e-15cadbb830f2.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b52f8337-030f-4985-ba1e-15cadbb830f2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b52f8337-030f-4985-ba1e-15cadbb830f2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T15:45:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xbb5727c417b5d7bd81be696ff1291f913e212f01d6550243df81ba1e52b06b5f","name":"Víctor Lavallén","registered_at":"2026-06-20T14:22:11Z","symbol":"NIM1630244","token_address":"0xa2dcaffb66087c31259d140a83f3f431aea03cd7","type":"artist","uuid":"b52f8337-030f-4985-ba1e-15cadbb830f2"}
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 0xbb5727c417b5d7bd81be696ff1291f913e212f01d6550243df81ba1e52b06b5f. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b52f8337-030f-4985-ba1e-15cadbb830f2.json and https://artists.proofprofile.net/proofs/artist/b52f8337-030f-4985-ba1e-15cadbb830f2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T15:45:29Z
  text: {"copyright_id":"0xbb5727c417b5d7bd81be696ff1291f913e212f01d6550243df81ba1e52b06b5f","name":"Víctor Lavallén","registered_at":"2026-06-20T14:22:11Z","symbol":"NIM1630244","token_address":"0xa2dcaffb66087c31259d140a83f3f431aea03cd7","type":"artist","uuid":"b52f8337-030f-4985-ba1e-15cadbb830f2"}
album: Amanecer Ciudadano: El Arte De La Orquesta Típica 1
  type: MusicAlbum
  date published: 2006-11-10