Premasiri Khemadasa
type: MusicGroup
description: Deshamanya Kala Keerthi Dr. Premasiri Khemadasa (Sinhala: ආචාර්ය ප්‍රේමසිරි කේමදාස ) (25 January 1937 – 24 October 2008) also known as "Khemadasa Master" was a Sri Lankan music composer. Exploring th
popularity: 9
followers: 293
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x82f29709fe9e012605466dd966aa2266c93a6562cb1081155f87b32cde7bb245
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953888
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953888
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0e3675b9-9e2d-4181-b6e2-086586e85791.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0e3675b9-9e2d-4181-b6e2-086586e85791.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0e3675b9-9e2d-4181-b6e2-086586e85791
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T04:55:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x82f29709fe9e012605466dd966aa2266c93a6562cb1081155f87b32cde7bb245","name":"Premasiri Khemadasa","registered_at":"2026-06-15T18:27:46Z","symbol":"NIM0794115","token_address":"0xb14d649db51e790582680259ff9adc4ffb5e6041","type":"artist","uuid":"0e3675b9-9e2d-4181-b6e2-086586e85791"}
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 0x82f29709fe9e012605466dd966aa2266c93a6562cb1081155f87b32cde7bb245. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e3675b9-9e2d-4181-b6e2-086586e85791.json and https://artists.proofprofile.net/proofs/artist/0e3675b9-9e2d-4181-b6e2-086586e85791.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T04:55:23Z
  text: {"copyright_id":"0x82f29709fe9e012605466dd966aa2266c93a6562cb1081155f87b32cde7bb245","name":"Premasiri Khemadasa","registered_at":"2026-06-15T18:27:46Z","symbol":"NIM0794115","token_address":"0xb14d649db51e790582680259ff9adc4ffb5e6041","type":"artist","uuid":"0e3675b9-9e2d-4181-b6e2-086586e85791"}
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