Matthew Caws
type: MusicGroup
genre: power pop
description: Matthew Rorison Caws (born August 5, 1967) is an American singer, songwriter and guitarist. He is best known as the lead vocalist and guitarist of the alternative rock band Nada Surf. Caws is also a m
popularity: 17
followers: 908
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x350905967e6cb8a144c9ec730e1db481127262a660fef5432331147a9621663c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953694
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953694
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6d86e3a6-1c0d-4ab8-bd19-36e28d8fc0f8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6d86e3a6-1c0d-4ab8-bd19-36e28d8fc0f8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6d86e3a6-1c0d-4ab8-bd19-36e28d8fc0f8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:38:09Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x350905967e6cb8a144c9ec730e1db481127262a660fef5432331147a9621663c","name":"Matthew Caws","registered_at":"2026-06-14T16:01:55Z","symbol":"NIM0503961","token_address":"0xe538c45cc98c1e5af2656eed41428cb0a886595d","type":"artist","uuid":"6d86e3a6-1c0d-4ab8-bd19-36e28d8fc0f8"}
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 0x350905967e6cb8a144c9ec730e1db481127262a660fef5432331147a9621663c. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d86e3a6-1c0d-4ab8-bd19-36e28d8fc0f8.json and https://artists.proofprofile.net/proofs/artist/6d86e3a6-1c0d-4ab8-bd19-36e28d8fc0f8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:38:09Z
  text: {"copyright_id":"0x350905967e6cb8a144c9ec730e1db481127262a660fef5432331147a9621663c","name":"Matthew Caws","registered_at":"2026-06-14T16:01:55Z","symbol":"NIM0503961","token_address":"0xe538c45cc98c1e5af2656eed41428cb0a886595d","type":"artist","uuid":"6d86e3a6-1c0d-4ab8-bd19-36e28d8fc0f8"}
album: When History Comes
  type: MusicAlbum
  date published: 2020-10-13
album: When History Comes
  type: MusicAlbum
  date published: 2020-10-13
album: Chemicals
  type: MusicAlbum
  date published: 2023-02-10