Joyce Castle
type: MusicGroup
genre: opera
description: Joyce Castle (born Lillian Joyce Malicky, on January 17, 1939,Texas Birth Index, 1903–1997 in Beaumont, Texas) is an American mezzo-soprano who has had an active opera career for the last four decades
popularity: 8
followers: 24
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x11705b0c2e13dfd7562d49c2e7560485e0bdb41691d4c0120aed5135ef2e6a93
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4f20bacf-123b-4d39-869c-07310bd3ef6a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4f20bacf-123b-4d39-869c-07310bd3ef6a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4f20bacf-123b-4d39-869c-07310bd3ef6a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x11705b0c2e13dfd7562d49c2e7560485e0bdb41691d4c0120aed5135ef2e6a93","name":"Joyce Castle","registered_at":"2026-06-16T17:06:11Z","symbol":"NIM1118324","token_address":"0x9b5ea213d6b622a6b2e121d205448c0c3d9015eb","type":"artist","uuid":"4f20bacf-123b-4d39-869c-07310bd3ef6a"}
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 0x11705b0c2e13dfd7562d49c2e7560485e0bdb41691d4c0120aed5135ef2e6a93. 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/4f20bacf-123b-4d39-869c-07310bd3ef6a.json and https://artists.proofprofile.net/proofs/artist/4f20bacf-123b-4d39-869c-07310bd3ef6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x11705b0c2e13dfd7562d49c2e7560485e0bdb41691d4c0120aed5135ef2e6a93","name":"Joyce Castle","registered_at":"2026-06-16T17:06:11Z","symbol":"NIM1118324","token_address":"0x9b5ea213d6b622a6b2e121d205448c0c3d9015eb","type":"artist","uuid":"4f20bacf-123b-4d39-869c-07310bd3ef6a"}