Christophe Lamarche-Ledoux
type: MusicGroup
description: thumb|The Quebec composer and musician Christophe Lamarche-Ledoux Christophe Lamarche-Ledoux is a Canadian musician and composer from Sherbrooke, Quebec.Émilie Côté, "Rock Forest: la surprise de l'hiv
popularity: 7
followers: 29
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe13e09af700e57da2a6527d7d4e7d4bdf6edea0b4cfce3a011881acbcbceea6c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953950
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953950
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/24545939-4ebe-4c2a-ba86-9578c5d34bf7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/24545939-4ebe-4c2a-ba86-9578c5d34bf7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/24545939-4ebe-4c2a-ba86-9578c5d34bf7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:35:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe13e09af700e57da2a6527d7d4e7d4bdf6edea0b4cfce3a011881acbcbceea6c","name":"Christophe Lamarche-Ledoux","registered_at":"2026-06-16T02:17:08Z","symbol":"NIM0906121","token_address":"0x6e816da97f2096f74486354274da54255a916e67","type":"artist","uuid":"24545939-4ebe-4c2a-ba86-9578c5d34bf7"}
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 0xe13e09af700e57da2a6527d7d4e7d4bdf6edea0b4cfce3a011881acbcbceea6c. Chain 2 (Bitcoin): anchored in block 953950 (2026-06-16T13:35:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24545939-4ebe-4c2a-ba86-9578c5d34bf7.json and https://artists.proofprofile.net/proofs/artist/24545939-4ebe-4c2a-ba86-9578c5d34bf7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:35:39Z
  text: {"copyright_id":"0xe13e09af700e57da2a6527d7d4e7d4bdf6edea0b4cfce3a011881acbcbceea6c","name":"Christophe Lamarche-Ledoux","registered_at":"2026-06-16T02:17:08Z","symbol":"NIM0906121","token_address":"0x6e816da97f2096f74486354274da54255a916e67","type":"artist","uuid":"24545939-4ebe-4c2a-ba86-9578c5d34bf7"}