Ilva Ligabue
type: MusicGroup
genre: opera
description: thumb|upright|Ilva Ligabue (photo with dedication) Ilva Ligabue (May 23, 1932 – August 19, 1998) was an Italian operatic soprano, best known for the role of Alice Ford in Falstaff, which she recorded
popularity: 9
followers: 74
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf74c9169dad201708f023671e65a7c155625e26e5c9d6dc1ee17388e6de67c21
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953896
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953896
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/109104ae-2efe-402b-868d-051f3f1f010e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/109104ae-2efe-402b-868d-051f3f1f010e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/109104ae-2efe-402b-868d-051f3f1f010e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T06:05:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf74c9169dad201708f023671e65a7c155625e26e5c9d6dc1ee17388e6de67c21","name":"Ilva Ligabue","registered_at":"2026-06-15T19:18:23Z","symbol":"NIM0806195","token_address":"0x5433997cfcc4ff51a65815c9b972b9dce821c737","type":"artist","uuid":"109104ae-2efe-402b-868d-051f3f1f010e"}
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 0xf74c9169dad201708f023671e65a7c155625e26e5c9d6dc1ee17388e6de67c21. Chain 2 (Bitcoin): anchored in block 953896 (2026-06-16T06:05:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/109104ae-2efe-402b-868d-051f3f1f010e.json and https://artists.proofprofile.net/proofs/artist/109104ae-2efe-402b-868d-051f3f1f010e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T06:05:56Z
  text: {"copyright_id":"0xf74c9169dad201708f023671e65a7c155625e26e5c9d6dc1ee17388e6de67c21","name":"Ilva Ligabue","registered_at":"2026-06-15T19:18:23Z","symbol":"NIM0806195","token_address":"0x5433997cfcc4ff51a65815c9b972b9dce821c737","type":"artist","uuid":"109104ae-2efe-402b-868d-051f3f1f010e"}
album: Otello
  type: MusicAlbum
  date published: 2021-10-01
album: Verdi: Il trovatore (Recorded 1961) [Live]
  type: MusicAlbum
  date published: 2015-05-01
album: Boito: Nerone (Live)
  type: MusicAlbum
  date published: 2015-01-01