Dharmadasa Walpola
type: MusicGroup
description: Dharmadasa Walpola (Sinhala: ධර්මදාස වල්පොල) (27 November 1927–25 December 1983), was a Sri Lankan singer. He is the most prominent Sri Lankan male playback singer of the 1950s and 1960s in Sinhala ci
popularity: 9
followers: 2680
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe5ebe8055de9976c8d489a657ba2f3accad115a79b0ebeedc9f3fb6f4c62340b
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/9a90781f-b6fa-4549-a7a3-e8668d4a3c61.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9a90781f-b6fa-4549-a7a3-e8668d4a3c61.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9a90781f-b6fa-4549-a7a3-e8668d4a3c61
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe5ebe8055de9976c8d489a657ba2f3accad115a79b0ebeedc9f3fb6f4c62340b","name":"Dharmadasa Walpola","registered_at":"2026-06-17T19:56:42Z","symbol":"NIM1498366","token_address":"0x3d9eec408d7bc423848ac5dfaf044b1a8b11db44","type":"artist","uuid":"9a90781f-b6fa-4549-a7a3-e8668d4a3c61"}
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 0xe5ebe8055de9976c8d489a657ba2f3accad115a79b0ebeedc9f3fb6f4c62340b. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9a90781f-b6fa-4549-a7a3-e8668d4a3c61.json and https://artists.proofprofile.net/proofs/artist/9a90781f-b6fa-4549-a7a3-e8668d4a3c61.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0xe5ebe8055de9976c8d489a657ba2f3accad115a79b0ebeedc9f3fb6f4c62340b","name":"Dharmadasa Walpola","registered_at":"2026-06-17T19:56:42Z","symbol":"NIM1498366","token_address":"0x3d9eec408d7bc423848ac5dfaf044b1a8b11db44","type":"artist","uuid":"9a90781f-b6fa-4549-a7a3-e8668d4a3c61"}
album: Sataneki Jeewithe - Single
  type: MusicAlbum
  date published: 1955-06-15
album: Lankaren Malak Pipi
  type: MusicAlbum
  date published: 2014-02-17
album: Me Saumya Rathriya
  type: MusicAlbum
  date published: 2014-02-17
  track: Me Saumya Rathriya
    type: MusicRecording
    duration: PT3M7S
    duration ms: 187245
    explicit: false
    by artist: Dharmadasa Walpola
    in album: Me Saumya Rathriya
      type: MusicAlbum
      date published: 2014-02-17
    isrc code: LKA000006643
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    additional property: CopyrightStatus
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      value: registered
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LKA000006643
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-03T10:47:44Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4031777f9f4cc9111bd8500040675f3f5d5ee465b60f418a014c1c521e7667d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LKA000006643.
      date published: 2026-07-03T10:47:44Z
    audio: Me Saumya Rathriya
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 148.088
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 3
      additional property: Danceability
        type: PropertyValue
        value: 0.399
      additional property: Energy
        type: PropertyValue
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      additional property: Speechiness
        type: PropertyValue
        value: 0.029
      additional property: Acousticness
        type: PropertyValue
        value: 0.348
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.109
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.649
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.668
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Maga Bala Balaa
    type: MusicRecording
    duration: PT2M55S
    duration ms: 175310
    explicit: false
    by artist: Dharmadasa Walpola
    in album: Me Saumya Rathriya
      type: MusicAlbum
      date published: 2014-02-17
    isrc code: LKA000006653
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
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      value: https://blockstream.info/api/block-height/958673
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LKA000006653
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T05:38:28Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7954ca63ba66e18c6daf688db07af4a5b21bb1cfba96ceace0baecfad0a78aa0. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/LKA000006653.
      date published: 2026-07-19T05:38:28Z
    audio: Maga Bala Balaa
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 123.512
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.719
      additional property: Energy
        type: PropertyValue
        value: 0.75
      additional property: Speechiness
        type: PropertyValue
        value: 0.031
      additional property: Acousticness
        type: PropertyValue
        value: 0.061
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Liveness
type: PropertyValue
value: 0.298

Valence (Positivity)
type: PropertyValue
value: 0.963

Loudness (dB)
type: PropertyValue
value: -7.388

Key Name
type: PropertyValue
value: D

Mode Name
type: PropertyValue
value: Major