Karen Dreyfus
type: MusicGroup
description: Karen Dreyfus is an American violist who currently teaches at the USC Thornton School of Music. Ms. Dreyfus has distinguished herself as a recipient of many prizes, including the Naumburg Viola Compet
popularity: 2
followers: 56
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc53ee90997e15877f0d0da630e65a49159160d7cfa6798587b64924ba1f4769f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b0e408bb-2fc7-4c70-b865-c1b6a6624f0b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b0e408bb-2fc7-4c70-b865-c1b6a6624f0b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b0e408bb-2fc7-4c70-b865-c1b6a6624f0b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc53ee90997e15877f0d0da630e65a49159160d7cfa6798587b64924ba1f4769f","name":"Karen Dreyfus","registered_at":"2026-06-20T12:24:54Z","symbol":"NIM1611342","token_address":"0xa5fda1141fe1aa58f9ceec695dfc3f7a928107d0","type":"artist","uuid":"b0e408bb-2fc7-4c70-b865-c1b6a6624f0b"}
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 0xc53ee90997e15877f0d0da630e65a49159160d7cfa6798587b64924ba1f4769f. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0e408bb-2fc7-4c70-b865-c1b6a6624f0b.json and https://artists.proofprofile.net/proofs/artist/b0e408bb-2fc7-4c70-b865-c1b6a6624f0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0xc53ee90997e15877f0d0da630e65a49159160d7cfa6798587b64924ba1f4769f","name":"Karen Dreyfus","registered_at":"2026-06-20T12:24:54Z","symbol":"NIM1611342","token_address":"0xa5fda1141fe1aa58f9ceec695dfc3f7a928107d0","type":"artist","uuid":"b0e408bb-2fc7-4c70-b865-c1b6a6624f0b"}
album: Romanze
  type: MusicAlbum
  date published: 1989-06-01
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  type: MusicAlbum
  date published: 2009-11-17
album: From Bow to String
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  type: MusicAlbum
  date published: 2019-04-26