Léo et Léon
type: MusicGroup
popularity: 4
followers: 209
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5ac68c1da58a26c0040ba7315080ab3bc428ca695ff4a39553513c36a6bf82dd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953970
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953970
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a33a7cc-e20d-4dc9-bade-b9ba3392a0db.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a33a7cc-e20d-4dc9-bade-b9ba3392a0db.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2a33a7cc-e20d-4dc9-bade-b9ba3392a0db
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:09:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5ac68c1da58a26c0040ba7315080ab3bc428ca695ff4a39553513c36a6bf82dd","name":"Léo et Léon","registered_at":"2026-06-16T04:10:25Z","symbol":"NIM0933177","token_address":"0x0445bc6973c73f7ddc73963c2415062aa30e335e","type":"artist","uuid":"2a33a7cc-e20d-4dc9-bade-b9ba3392a0db"}
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 0x5ac68c1da58a26c0040ba7315080ab3bc428ca695ff4a39553513c36a6bf82dd. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a33a7cc-e20d-4dc9-bade-b9ba3392a0db.json and https://artists.proofprofile.net/proofs/artist/2a33a7cc-e20d-4dc9-bade-b9ba3392a0db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x5ac68c1da58a26c0040ba7315080ab3bc428ca695ff4a39553513c36a6bf82dd","name":"Léo et Léon","registered_at":"2026-06-16T04:10:25Z","symbol":"NIM0933177","token_address":"0x0445bc6973c73f7ddc73963c2415062aa30e335e","type":"artist","uuid":"2a33a7cc-e20d-4dc9-bade-b9ba3392a0db"}
album: Passeurs de rêves
  type: MusicAlbum
  date published: 2015-04-15
album: Léo, Léon et la Diva Nova (2017)
  type: MusicAlbum
  date published: 2017-11-12
album: Rêvomatik
  type: MusicAlbum
  date published: 2023-10-16