H. M. Jayawardena
type: MusicGroup
description: Herath Mudiyanselage Jayawardena (17 March 1950 – 18 April 2019: ), popularly as H. M. Jayawardena, was a Sri Lankan flutist, musician and composer. One of the most respected musicians in Sri Lanka, J
popularity: 15
followers: 1127
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  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
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  date published: 2026-06-15T15:41:00Z
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album: Gangawa Mamai, Vol. 1
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  date published: 2003-01-01
  track: Raththaran Neth
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    by artist: H. M. Jayawardena
    in album: Gangawa Mamai, Vol. 1
      type: MusicAlbum
      date published: 2003-01-01
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      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
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b93f85576bcf44ae7cfd617a03bbf1ef68501e1e765ece4356cf569c7465b3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMBZ92179728.
      date published: 2026-07-03T19:59:51Z
    audio: Raththaran Neth
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  track: Sagawanna Epa Hasarel
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    by artist: H. M. Jayawardena
    in album: Gangawa Mamai, Vol. 1
      type: MusicAlbum
      date published: 2003-01-01
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    additional property: OTSVerifyInstructions
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      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
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      date published: 2026-07-18T00:27:51Z
    audio: Sagawanna Epa Hasarel
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      additional property: Acousticness
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      additional property: Loudness (dB)
      additional property: Key Name
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album: Gangawa Mamai, Vol. 2

Loudness (dB)
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value: -9.729

Key Name
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value: G

Mode Name
type: PropertyValue
value: Minor

Gangawa Mamai, Vol. 2
type: MusicAlbum
date published: 2003-01-01