Concha Buika
type: MusicGroup
genre: fado
description: María Concepción Balboa Buika (born 11 May 1972), known as Concha Buika or just Buika, is a Spanish singer. Her album Niña de Fuego was nominated for the 2008 Latin Grammy Award for Album of the Year
popularity: 11
followers: 6
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9f493871bc20bdfdbc1c4815e5ced1ba80dbcc00ef50a44841ad5130d9294c22
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953660
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953660
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/527f8b44-750a-4ac6-b923-dd7960e262fd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/527f8b44-750a-4ac6-b923-dd7960e262fd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/527f8b44-750a-4ac6-b923-dd7960e262fd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T17:20:01Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x9f493871bc20bdfdbc1c4815e5ced1ba80dbcc00ef50a44841ad5130d9294c22","name":"Concha Buika","registered_at":"2026-06-14T13:08:17Z","symbol":"NIM0462518","token_address":"0x18dc9420438c2ae1edff46feb5bad333235aaba4","type":"artist","uuid":"527f8b44-750a-4ac6-b923-dd7960e262fd"}
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 0x9f493871bc20bdfdbc1c4815e5ced1ba80dbcc00ef50a44841ad5130d9294c22. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/527f8b44-750a-4ac6-b923-dd7960e262fd.json and https://artists.proofprofile.net/proofs/artist/527f8b44-750a-4ac6-b923-dd7960e262fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T17:20:01Z
  text: {"copyright_id":"0x9f493871bc20bdfdbc1c4815e5ced1ba80dbcc00ef50a44841ad5130d9294c22","name":"Concha Buika","registered_at":"2026-06-14T13:08:17Z","symbol":"NIM0462518","token_address":"0x18dc9420438c2ae1edff46feb5bad333235aaba4","type":"artist","uuid":"527f8b44-750a-4ac6-b923-dd7960e262fd"}