David Keppel
type: MusicGroup
popularity: 2
followers: 81
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x91ed3ae2c97d55976a7f64deb2a1d4aaa342eeddbe8ecffc20832313965fc15d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a0a4bc41-83c7-4d61-9987-523855726c74.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a0a4bc41-83c7-4d61-9987-523855726c74.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a0a4bc41-83c7-4d61-9987-523855726c74
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x91ed3ae2c97d55976a7f64deb2a1d4aaa342eeddbe8ecffc20832313965fc15d","name":"David Keppel","registered_at":"2026-06-20T05:34:07Z","symbol":"NIM1527825","token_address":"0x4212f29dfa41d57aa30dd7a7742580a7e10056d4","type":"artist","uuid":"a0a4bc41-83c7-4d61-9987-523855726c74"}
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 0x91ed3ae2c97d55976a7f64deb2a1d4aaa342eeddbe8ecffc20832313965fc15d. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0a4bc41-83c7-4d61-9987-523855726c74.json and https://artists.proofprofile.net/proofs/artist/a0a4bc41-83c7-4d61-9987-523855726c74.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
  text: {"copyright_id":"0x91ed3ae2c97d55976a7f64deb2a1d4aaa342eeddbe8ecffc20832313965fc15d","name":"David Keppel","registered_at":"2026-06-20T05:34:07Z","symbol":"NIM1527825","token_address":"0x4212f29dfa41d57aa30dd7a7742580a7e10056d4","type":"artist","uuid":"a0a4bc41-83c7-4d61-9987-523855726c74"}
album: David Keppel and Lazy
  type: MusicAlbum
  date published: 2003-07-29
album: Harbinger of Dust
  type: MusicAlbum
  date published: 2018-04-25
album: The Varieties of Extraordinary Experience
  type: MusicAlbum
  date published: 2020-07-11
album: David Keppel and Default-Land
  type: MusicAlbum
  date published: 2021-02-22
album: Default-Land EP 2
  type: MusicAlbum
  date published: 2023-11-16