Leo Lionni
type: MusicGroup
genre: children's music
description: Leo Lionni (May 5, 1910 – October 11, 1999) was an American writer and illustrator of children's books. Born in the Netherlands, he moved to Italy and lived there before moving to the United States in
popularity: 6
followers: 76
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2c1987d2a2e16160147950e56a000144e658a3aa4db4d26da38cf6297aca8da0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953875
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953875
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/085bd39b-da8d-44e9-85c1-1aad127b0c69.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/085bd39b-da8d-44e9-85c1-1aad127b0c69.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/085bd39b-da8d-44e9-85c1-1aad127b0c69
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T02:12:46Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2c1987d2a2e16160147950e56a000144e658a3aa4db4d26da38cf6297aca8da0","name":"Leo Lionni","registered_at":"2026-06-15T16:30:47Z","symbol":"NIM0766203","token_address":"0xeaa9e7afc0f3206cc3af465c41596012ec13a3b7","type":"artist","uuid":"085bd39b-da8d-44e9-85c1-1aad127b0c69"}
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 0x2c1987d2a2e16160147950e56a000144e658a3aa4db4d26da38cf6297aca8da0. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/085bd39b-da8d-44e9-85c1-1aad127b0c69.json and https://artists.proofprofile.net/proofs/artist/085bd39b-da8d-44e9-85c1-1aad127b0c69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:53:13Z
  text: {"copyright_id":"0x2c1987d2a2e16160147950e56a000144e658a3aa4db4d26da38cf6297aca8da0","name":"Leo Lionni","registered_at":"2026-06-15T16:30:47Z","symbol":"NIM0766203","token_address":"0xeaa9e7afc0f3206cc3af465c41596012ec13a3b7","type":"artist","uuid":"085bd39b-da8d-44e9-85c1-1aad127b0c69"}