Matthew Douglas Simpson
type: MusicGroup
popularity: 11
followers: 363
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6351d789a148ac76ee8ab936deb72d43140a13838520da48c9eef9fc83ebbd46
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953758
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953758
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b2b2a3ab-1b7b-4caa-be0f-a41cc0f0fe38.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b2b2a3ab-1b7b-4caa-be0f-a41cc0f0fe38.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b2b2a3ab-1b7b-4caa-be0f-a41cc0f0fe38
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T07:48:25Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6351d789a148ac76ee8ab936deb72d43140a13838520da48c9eef9fc83ebbd46","name":"Matthew Douglas Simpson","registered_at":"2026-06-14T23:19:01Z","symbol":"NIM0608191","token_address":"0x7cb764d71022552ab3830bd72361a01566b9e70a","type":"artist","uuid":"b2b2a3ab-1b7b-4caa-be0f-a41cc0f0fe38"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6351d789a148ac76ee8ab936deb72d43140a13838520da48c9eef9fc83ebbd46. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2b2a3ab-1b7b-4caa-be0f-a41cc0f0fe38.json and https://artists.proofprofile.net/proofs/artist/b2b2a3ab-1b7b-4caa-be0f-a41cc0f0fe38.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T09:50:11Z
  text: {"copyright_id":"0x6351d789a148ac76ee8ab936deb72d43140a13838520da48c9eef9fc83ebbd46","name":"Matthew Douglas Simpson","registered_at":"2026-06-14T23:19:01Z","symbol":"NIM0608191","token_address":"0x7cb764d71022552ab3830bd72361a01566b9e70a","type":"artist","uuid":"b2b2a3ab-1b7b-4caa-be0f-a41cc0f0fe38"}
album: Nickels & Dimes
  type: MusicAlbum
  date published: 2016-08-02
album: Bluegrass Blues
  type: MusicAlbum
  date published: 2018-05-17
album: '90s Kid
  type: MusicAlbum
  date published: 2019-11-15
album: Grand Prix
  type: MusicAlbum
  date published: 2020-07-31
album: Virginia
  type: MusicAlbum
  date published: 2020-10-31
album: Bittersweet
  type: MusicAlbum
  date published: 2021-02-26
album: Redbird Mama
  type: MusicAlbum
  date published: 2022-08-05
album: People Like You
  type: MusicAlbum
  date published: 2024-01-05
album: Built To Last
  type: MusicAlbum
  date published: 2024-05-10
album: Stay Awhile
  type: MusicAlbum
  date published: 2024-06-21
album: Lean
  type: MusicAlbum
  date published: 2025-02-07
album: A Woman
  type: MusicAlbum
  date published: 2025-08-29
album: Hardheaded
  type: MusicAlbum
  date published: 2025-10-17