Barbara Dever
type: MusicGroup
genre: classical
genre: opera
description: Barbara Dever (born December 25, 1951) is an American mezzo-soprano opera singer who has appeared with Luciano Pavarotti, Plácido Domingo, Zubin Mehta, Nello Santi and James Levine. Dever grew up in
popularity: 22
followers: 79
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3bf3ab5c1ca4c1924d1bca927ee80c1b84581ef06ade5663e42b4cc8a3fe3cb8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1d8840eb-6697-4be4-a989-b9fc086366a0.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1d8840eb-6697-4be4-a989-b9fc086366a0.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1d8840eb-6697-4be4-a989-b9fc086366a0
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x3bf3ab5c1ca4c1924d1bca927ee80c1b84581ef06ade5663e42b4cc8a3fe3cb8","name":"Barbara Dever","registered_at":"2026-06-11T13:49:03Z","symbol":"NIM0039717","token_address":"0x001d87c61c6cb72827f5afe9d186d2e86b9ad2ec","type":"artist","uuid":"1d8840eb-6697-4be4-a989-b9fc086366a0"}
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 0x3bf3ab5c1ca4c1924d1bca927ee80c1b84581ef06ade5663e42b4cc8a3fe3cb8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d8840eb-6697-4be4-a989-b9fc086366a0.json and https://artists.proofprofile.net/proofs/artist/1d8840eb-6697-4be4-a989-b9fc086366a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x3bf3ab5c1ca4c1924d1bca927ee80c1b84581ef06ade5663e42b4cc8a3fe3cb8","name":"Barbara Dever","registered_at":"2026-06-11T13:49:03Z","symbol":"NIM0039717","token_address":"0x001d87c61c6cb72827f5afe9d186d2e86b9ad2ec","type":"artist","uuid":"1d8840eb-6697-4be4-a989-b9fc086366a0"}