Ernesto Halffter
type: MusicGroup
genre: punto guajiro
description: thumb|Ernesto Halffter Ernesto Halffter Escriche (16 January 19055 July 1989) was a Spanish composer and conductor. He was the brother of Rodolfo Halffter and part of the Grupo de los Ocho (), which
popularity: 8
followers: 519
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x291f75c4111f9a6a59b51faaf6b231fd4bac137c92fb54188b3757e686b3816b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954587
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954587
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bc304b97-9b1b-4f1b-a9bf-da5ffe002682.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/bc304b97-9b1b-4f1b-a9bf-da5ffe002682.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/bc304b97-9b1b-4f1b-a9bf-da5ffe002682
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T19:10:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x291f75c4111f9a6a59b51faaf6b231fd4bac137c92fb54188b3757e686b3816b","name":"Ernesto Halffter","registered_at":"2026-06-20T17:22:43Z","symbol":"NIM1666418","token_address":"0xbb05dbe7ce993f992aaecdb63a5bb3a63432df93","type":"artist","uuid":"bc304b97-9b1b-4f1b-a9bf-da5ffe002682"}
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 0x291f75c4111f9a6a59b51faaf6b231fd4bac137c92fb54188b3757e686b3816b. Chain 2 (Bitcoin): anchored in block 954588 (2026-06-20T19:15:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bc304b97-9b1b-4f1b-a9bf-da5ffe002682.json and https://artists.proofprofile.net/proofs/artist/bc304b97-9b1b-4f1b-a9bf-da5ffe002682.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T19:15:05Z
  text: {"copyright_id":"0x291f75c4111f9a6a59b51faaf6b231fd4bac137c92fb54188b3757e686b3816b","name":"Ernesto Halffter","registered_at":"2026-06-20T17:22:43Z","symbol":"NIM1666418","token_address":"0xbb05dbe7ce993f992aaecdb63a5bb3a63432df93","type":"artist","uuid":"bc304b97-9b1b-4f1b-a9bf-da5ffe002682"}
album: Smörgasbord: Encores and Short Pieces for Cello and Piano
  type: MusicAlbum
  date published: 2001-09-01