Elsa Cavelti
type: MusicGroup
description: Elsa Cavelti (4 May 1907 – 10 August 2001) was a Swiss operatic contralto and mezzo-soprano, temporarily also a dramatic soprano, who worked at German and Swiss opera houses and as an international gu
popularity: 2
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x599602ccec728f7eaa5a0c017f1b85f6d2246615edf6b63641080c854badd669
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953991
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953991
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2ee90408-e8c3-4655-8c0c-f8f3de405bb7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2ee90408-e8c3-4655-8c0c-f8f3de405bb7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2ee90408-e8c3-4655-8c0c-f8f3de405bb7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T18:47:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x599602ccec728f7eaa5a0c017f1b85f6d2246615edf6b63641080c854badd669","name":"Elsa Cavelti","registered_at":"2026-06-16T05:52:35Z","symbol":"NIM0957590","token_address":"0x1bad65f874b1920a677ddc590a5a589e199a9066","type":"artist","uuid":"2ee90408-e8c3-4655-8c0c-f8f3de405bb7"}
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 0x599602ccec728f7eaa5a0c017f1b85f6d2246615edf6b63641080c854badd669. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ee90408-e8c3-4655-8c0c-f8f3de405bb7.json and https://artists.proofprofile.net/proofs/artist/2ee90408-e8c3-4655-8c0c-f8f3de405bb7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T18:47:23Z
  text: {"copyright_id":"0x599602ccec728f7eaa5a0c017f1b85f6d2246615edf6b63641080c854badd669","name":"Elsa Cavelti","registered_at":"2026-06-16T05:52:35Z","symbol":"NIM0957590","token_address":"0x1bad65f874b1920a677ddc590a5a589e199a9066","type":"artist","uuid":"2ee90408-e8c3-4655-8c0c-f8f3de405bb7"}