Robert Marcel Lepage
type: MusicGroup
genre: avant-garde
genre: experimental
description: Robert Marcel Lepage (born 5 July 1951) is a Canadian musician and film score composer. Born in Montreal, Lepage trained in music at the age of 20, and learned to play the clarinet and saxophone. He
popularity: 2
followers: 174
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc09be8a7180c6ba4dfead34ff3c0f7a007783a90ef1b15699fb06bb6c1847609
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a3cd0bb2-d9f5-4975-836c-52d16995d8ea.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a3cd0bb2-d9f5-4975-836c-52d16995d8ea.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a3cd0bb2-d9f5-4975-836c-52d16995d8ea
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc09be8a7180c6ba4dfead34ff3c0f7a007783a90ef1b15699fb06bb6c1847609","name":"Robert Marcel Lepage","registered_at":"2026-06-20T06:30:15Z","symbol":"NIM1540939","token_address":"0xde36c598a3c55b5f30cfd20421e46f01c7fb7e32","type":"artist","uuid":"a3cd0bb2-d9f5-4975-836c-52d16995d8ea"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc09be8a7180c6ba4dfead34ff3c0f7a007783a90ef1b15699fb06bb6c1847609. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3cd0bb2-d9f5-4975-836c-52d16995d8ea.json and https://artists.proofprofile.net/proofs/artist/a3cd0bb2-d9f5-4975-836c-52d16995d8ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0xc09be8a7180c6ba4dfead34ff3c0f7a007783a90ef1b15699fb06bb6c1847609","name":"Robert Marcel Lepage","registered_at":"2026-06-20T06:30:15Z","symbol":"NIM1540939","token_address":"0xde36c598a3c55b5f30cfd20421e46f01c7fb7e32","type":"artist","uuid":"a3cd0bb2-d9f5-4975-836c-52d16995d8ea"}
album: Callas: La diva et le vinyle
  type: MusicAlbum
  date published: 1997-01-01