Marita Napier
type: MusicGroup
genre: opera
description: Marita Napier (née Jacobs; 16 February 1939 – 10 April 2004) was a South African operatic soprano, known internationally as a performer of music by Strauss and Wagner. She performed in 19 productions
popularity: 3
followers: 15
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x83248c359b4db72d85fd73dc0ccd822ccbef7b5eb8bb5881aaec2a4b4688fbb2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5c6a189d-98fc-4694-a32c-cbaa06162040.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5c6a189d-98fc-4694-a32c-cbaa06162040.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5c6a189d-98fc-4694-a32c-cbaa06162040
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x83248c359b4db72d85fd73dc0ccd822ccbef7b5eb8bb5881aaec2a4b4688fbb2","name":"Marita Napier","registered_at":"2026-06-16T21:47:56Z","symbol":"NIM1185557","token_address":"0xe0cf9eb82781f57f8ed6d331f431362582225e71","type":"artist","uuid":"5c6a189d-98fc-4694-a32c-cbaa06162040"}
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 0x83248c359b4db72d85fd73dc0ccd822ccbef7b5eb8bb5881aaec2a4b4688fbb2. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c6a189d-98fc-4694-a32c-cbaa06162040.json and https://artists.proofprofile.net/proofs/artist/5c6a189d-98fc-4694-a32c-cbaa06162040.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x83248c359b4db72d85fd73dc0ccd822ccbef7b5eb8bb5881aaec2a4b4688fbb2","name":"Marita Napier","registered_at":"2026-06-16T21:47:56Z","symbol":"NIM1185557","token_address":"0xe0cf9eb82781f57f8ed6d331f431362582225e71","type":"artist","uuid":"5c6a189d-98fc-4694-a32c-cbaa06162040"}