Roger Usart
type: MusicGroup
genre: americana
genre: retro soul
popularity: 7
followers: 383
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x86ad8b4ee6bc0030f5aa4ccad138b460640494bde5a798e64e56d26b820e06da
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c36f0878-3f4f-4478-95cf-aa12aa9709dc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c36f0878-3f4f-4478-95cf-aa12aa9709dc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c36f0878-3f4f-4478-95cf-aa12aa9709dc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x86ad8b4ee6bc0030f5aa4ccad138b460640494bde5a798e64e56d26b820e06da","name":"Roger Usart","registered_at":"2026-06-20T20:34:20Z","symbol":"NIM1706789","token_address":"0x74e356e971582692904877bb2d520670f7678f3b","type":"artist","uuid":"c36f0878-3f4f-4478-95cf-aa12aa9709dc"}
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 0x86ad8b4ee6bc0030f5aa4ccad138b460640494bde5a798e64e56d26b820e06da. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c36f0878-3f4f-4478-95cf-aa12aa9709dc.json and https://artists.proofprofile.net/proofs/artist/c36f0878-3f4f-4478-95cf-aa12aa9709dc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0x86ad8b4ee6bc0030f5aa4ccad138b460640494bde5a798e64e56d26b820e06da","name":"Roger Usart","registered_at":"2026-06-20T20:34:20Z","symbol":"NIM1706789","token_address":"0x74e356e971582692904877bb2d520670f7678f3b","type":"artist","uuid":"c36f0878-3f4f-4478-95cf-aa12aa9709dc"}
album: Cage Without a Bird
  type: MusicAlbum
  date published: 2013-04-09
album: Songs from a Twisted Neck
  type: MusicAlbum
  date published: 2016-11-04
album: Songs from a Twisted Neck
  type: MusicAlbum
  date published: 2016-11-04
album: La Vida Que Pren
  type: MusicAlbum
  date published: 2020-03-13
album: Llamp de Bosc
  type: MusicAlbum
  date published: 2020-09-25