Hollywood String Quartet
type: MusicGroup
genre: chamber music
description: The Hollywood String Quartet (HSQ) was an American string quartet founded by violinist/conductor Felix Slatkin and his wife cellist Eleanor Aller. The Hollywood String Quartet is considered to be the
popularity: 2
followers: 241
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x1505b9fe0dcbfa2d43f6ff3ba7cad40b392e264c38be0f2a31809416581d4e77
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953958
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953958
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/270a71e6-bc9e-4702-b010-327b5be2557f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/270a71e6-bc9e-4702-b010-327b5be2557f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/270a71e6-bc9e-4702-b010-327b5be2557f
additional property: OTSTimestamp
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  value: 2026-06-16T14:52:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
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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 0x1505b9fe0dcbfa2d43f6ff3ba7cad40b392e264c38be0f2a31809416581d4e77. Chain 2 (Bitcoin): anchored in block 953958 (2026-06-16T14:52:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/270a71e6-bc9e-4702-b010-327b5be2557f.json and https://artists.proofprofile.net/proofs/artist/270a71e6-bc9e-4702-b010-327b5be2557f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:52:44Z
  text: {"copyright_id":"0x1505b9fe0dcbfa2d43f6ff3ba7cad40b392e264c38be0f2a31809416581d4e77","name":"Hollywood String Quartet","registered_at":"2026-06-16T03:04:30Z","symbol":"NIM0917436","token_address":"0x61ded4957143063f01ef2d2dce97084d72f61cd9","type":"artist","uuid":"270a71e6-bc9e-4702-b010-327b5be2557f"}
album: Smetana: String Quartet No.1, JB 1:105
  type: MusicAlbum
  date published: 1950
album: Brahms: Piano Quintet in F minor, Op.34
  type: MusicAlbum
  date published: 1950
album: Tchaikovsky & Borodin: String Quartets (Mono Version)
  type: MusicAlbum
  date published: 1954-01-01