Budapest String Quartet
type: MusicGroup
genre: chamber music
genre: classical
description: The Budapest String Quartet was a string quartet in existence from 1917 to 1967. It originally consisted of three Hungarians and a Dutchman; at the end, the quartet consisted of four Russians. A num
popularity: 16
followers: 2326
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x742290714a88cfda034ca8f05d6c7c1f3273bc52582c80235eff8a285b84b06a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953777
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953777
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c965af8c-f312-43db-a2cd-43a7f0bfe4df.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c965af8c-f312-43db-a2cd-43a7f0bfe4df.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c965af8c-f312-43db-a2cd-43a7f0bfe4df
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:52:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x742290714a88cfda034ca8f05d6c7c1f3273bc52582c80235eff8a285b84b06a","name":"Budapest String Quartet","registered_at":"2026-06-15T01:46:36Z","symbol":"NIM0643475","token_address":"0x87aa021be860fc3f3b30c69f5511524e25287fb9","type":"artist","uuid":"c965af8c-f312-43db-a2cd-43a7f0bfe4df"}
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
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  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742290714a88cfda034ca8f05d6c7c1f3273bc52582c80235eff8a285b84b06a. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c965af8c-f312-43db-a2cd-43a7f0bfe4df.json and https://artists.proofprofile.net/proofs/artist/c965af8c-f312-43db-a2cd-43a7f0bfe4df.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:52:51Z
  text: {"copyright_id":"0x742290714a88cfda034ca8f05d6c7c1f3273bc52582c80235eff8a285b84b06a","name":"Budapest String Quartet","registered_at":"2026-06-15T01:46:36Z","symbol":"NIM0643475","token_address":"0x87aa021be860fc3f3b30c69f5511524e25287fb9","type":"artist","uuid":"c965af8c-f312-43db-a2cd-43a7f0bfe4df"}
album: The Great Violinists, Vol. 29
  type: MusicAlbum
  date published: 2012-09-04