Romuald Twardowski
type: MusicGroup
description: Romuald Twardowski (; 17 June 1930 – 13 January 2024) was a Polish composer, pianist, organist and academic teacher who studied in Vilnius, Warsaw and Paris. In a style described as "developed neoclas
popularity: 3
followers: 200
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeca7c38874acfd52fa075afb075d1030ee7e89115ad3daf2b0dd615d4ae08110
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/df1b06aa-cf83-486e-be47-59dbe07b0c95.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/df1b06aa-cf83-486e-be47-59dbe07b0c95.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/df1b06aa-cf83-486e-be47-59dbe07b0c95
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xeca7c38874acfd52fa075afb075d1030ee7e89115ad3daf2b0dd615d4ae08110","name":"Romuald Twardowski","registered_at":"2026-06-21T06:02:28Z","symbol":"NIM1841492","token_address":"0x4333b930eab4afee3a8f384d86d64e4402bc4c8e","type":"artist","uuid":"df1b06aa-cf83-486e-be47-59dbe07b0c95"}
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 0xeca7c38874acfd52fa075afb075d1030ee7e89115ad3daf2b0dd615d4ae08110. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/df1b06aa-cf83-486e-be47-59dbe07b0c95.json and https://artists.proofprofile.net/proofs/artist/df1b06aa-cf83-486e-be47-59dbe07b0c95.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xeca7c38874acfd52fa075afb075d1030ee7e89115ad3daf2b0dd615d4ae08110","name":"Romuald Twardowski","registered_at":"2026-06-21T06:02:28Z","symbol":"NIM1841492","token_address":"0x4333b930eab4afee3a8f384d86d64e4402bc4c8e","type":"artist","uuid":"df1b06aa-cf83-486e-be47-59dbe07b0c95"}
album: Romuald Twardowski - Liturgy of St John Chrysostom
  type: MusicAlbum
  date published: 2022-05-01