Chris Kemp
type: MusicGroup
description: Chris C. Kemp (born 1977) is an American entrepreneur who, along with Dr. Adam London, founded Astra, a space technology firm based in California, in 2016. He served as the chief information officer (
popularity: 3
followers: 160
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x826550333cfe6ec89a7d913ba428dcbfa347ce8ac43a48abedc1e8082d1c1eae
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954019
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954019
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/37a9f200-9aa9-4b92-aefe-5a27a9880a37.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/37a9f200-9aa9-4b92-aefe-5a27a9880a37.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/37a9f200-9aa9-4b92-aefe-5a27a9880a37
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T23:44:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x826550333cfe6ec89a7d913ba428dcbfa347ce8ac43a48abedc1e8082d1c1eae","name":"Chris Kemp","registered_at":"2026-06-16T08:57:03Z","symbol":"NIM1001633","token_address":"0xba6ed936247d7d62c9d10fee18f9f03953d101a1","type":"artist","uuid":"37a9f200-9aa9-4b92-aefe-5a27a9880a37"}
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 0x826550333cfe6ec89a7d913ba428dcbfa347ce8ac43a48abedc1e8082d1c1eae. Chain 2 (Bitcoin): anchored in block 954019 (2026-06-16T23:44:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/37a9f200-9aa9-4b92-aefe-5a27a9880a37.json and https://artists.proofprofile.net/proofs/artist/37a9f200-9aa9-4b92-aefe-5a27a9880a37.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T23:44:13Z
  text: {"copyright_id":"0x826550333cfe6ec89a7d913ba428dcbfa347ce8ac43a48abedc1e8082d1c1eae","name":"Chris Kemp","registered_at":"2026-06-16T08:57:03Z","symbol":"NIM1001633","token_address":"0xba6ed936247d7d62c9d10fee18f9f03953d101a1","type":"artist","uuid":"37a9f200-9aa9-4b92-aefe-5a27a9880a37"}
album: A Little More Country
  type: MusicAlbum
  date published: 2014-05-06
album: You Don't Have to Be a Cowboy
  type: MusicAlbum
  date published: 2014-05-12
album: Chris Kemp
  type: MusicAlbum
  date published: 2018-05-28