David Llewellyn
type: MusicGroup
genre: americana
description: David Llewellyn may refer to: David Llewellyn (Australian politician) (born 1942), member of the Parliament of Tasmania David Llewellyn (British politician) (1916–1992), British Member of Parliament
popularity: 7
followers: 208
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc99549f18cb336927b6d198722c7dc6b2666c214e71f1cd1e162db0635f159c3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953930
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953930
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ee892f0-ff0c-4982-881b-0120c2b3dff4.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ee892f0-ff0c-4982-881b-0120c2b3dff4.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1ee892f0-ff0c-4982-881b-0120c2b3dff4
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T10:36:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc99549f18cb336927b6d198722c7dc6b2666c214e71f1cd1e162db0635f159c3","name":"David Llewellyn","registered_at":"2026-06-16T00:11:23Z","symbol":"NIM0876091","token_address":"0xe6f4f454cf483709badb38740c844e68f82b50c0","type":"artist","uuid":"1ee892f0-ff0c-4982-881b-0120c2b3dff4"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99549f18cb336927b6d198722c7dc6b2666c214e71f1cd1e162db0635f159c3. Chain 2 (Bitcoin): anchored in block 953930 (2026-06-16T10:36:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ee892f0-ff0c-4982-881b-0120c2b3dff4.json and https://artists.proofprofile.net/proofs/artist/1ee892f0-ff0c-4982-881b-0120c2b3dff4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T10:36:13Z
  text: {"copyright_id":"0xc99549f18cb336927b6d198722c7dc6b2666c214e71f1cd1e162db0635f159c3","name":"David Llewellyn","registered_at":"2026-06-16T00:11:23Z","symbol":"NIM0876091","token_address":"0xe6f4f454cf483709badb38740c844e68f82b50c0","type":"artist","uuid":"1ee892f0-ff0c-4982-881b-0120c2b3dff4"}
album: David Llewellyn
  type: MusicAlbum
  date published: 2004-01-01
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  type: MusicAlbum
  date published: 2014-12-01
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  date published: 2015-05-01
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  type: MusicAlbum
  date published: 2017-02-01
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  type: MusicAlbum
  date published: 2017-02-01