Umberto Tozzi
type: MusicGroup
description: Umberto Antonio Tozzi (; born 4 March 1952) is an Italian pop and rock singer and songwriter. Throughout his career, he has sold over 70 million records in different languages internationally. His big
popularity: 3
followers: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2c92043b151750734e3750f21e62c99e678ed5c52e35cb473b0f13451faf9dd5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954650
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954650
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/daa8baf4-431a-4fa7-87c7-533ee62cb983.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/daa8baf4-431a-4fa7-87c7-533ee62cb983.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/daa8baf4-431a-4fa7-87c7-533ee62cb983
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:51:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2c92043b151750734e3750f21e62c99e678ed5c52e35cb473b0f13451faf9dd5","name":"Umberto Tozzi","registered_at":"2026-06-21T04:27:41Z","symbol":"NIM1819880","token_address":"0x4e0a9faf1a19a9682d4bce4c7ed8da166fadaa07","type":"artist","uuid":"daa8baf4-431a-4fa7-87c7-533ee62cb983"}
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 0x2c92043b151750734e3750f21e62c99e678ed5c52e35cb473b0f13451faf9dd5. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/daa8baf4-431a-4fa7-87c7-533ee62cb983.json and https://artists.proofprofile.net/proofs/artist/daa8baf4-431a-4fa7-87c7-533ee62cb983.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T04:51:12Z
  text: {"copyright_id":"0x2c92043b151750734e3750f21e62c99e678ed5c52e35cb473b0f13451faf9dd5","name":"Umberto Tozzi","registered_at":"2026-06-21T04:27:41Z","symbol":"NIM1819880","token_address":"0x4e0a9faf1a19a9682d4bce4c7ed8da166fadaa07","type":"artist","uuid":"daa8baf4-431a-4fa7-87c7-533ee62cb983"}