Francisco Valls
type: MusicGroup
description: Francisco Valls or Francesc Valls (Barcelona 1665/1671 – 2 February 1747) was a Spanish composer, theorist and mestre de capella. Among his most known works are the mass Missa Scala Aretina and tract
popularity: 6
followers: 138
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xde4a58783ee64dad1558c4e5bc93fd12d1c1bfbfe53bd0e7568c60ba0cfc8c86
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 953907
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953907
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15d54a19-d421-4f4b-acb9-8954d7e71558.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/15d54a19-d421-4f4b-acb9-8954d7e71558.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/15d54a19-d421-4f4b-acb9-8954d7e71558
additional property: OTSTimestamp
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  value: 2026-06-16T07:39:24Z
additional property: OTSCanonicalRecord
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4a58783ee64dad1558c4e5bc93fd12d1c1bfbfe53bd0e7568c60ba0cfc8c86. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15d54a19-d421-4f4b-acb9-8954d7e71558.json and https://artists.proofprofile.net/proofs/artist/15d54a19-d421-4f4b-acb9-8954d7e71558.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T07:39:24Z
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album: Valls: Tonos divinos españoles
  type: MusicAlbum
  date published: 2011-07-05
album: Valls: Tonos divinos españoles
  type: MusicAlbum
  date published: 2011-07-05
album: Francisco Valls: Mass 'Scala Aretina'
  type: MusicAlbum
  date published: 2014-10-01