John Calhoun
type: MusicGroup
popularity: 3
followers: 608
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc947453ef060223d852d8ce85d2fb03d599ee1c813d91eea1f5efdd6e4ee5499
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954631
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954631
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cf2158f3-3c89-4e42-b9ae-f1f26b016d4a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/cf2158f3-3c89-4e42-b9ae-f1f26b016d4a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/cf2158f3-3c89-4e42-b9ae-f1f26b016d4a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T02:46:24Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc947453ef060223d852d8ce85d2fb03d599ee1c813d91eea1f5efdd6e4ee5499","name":"John Calhoun","registered_at":"2026-06-21T00:11:48Z","symbol":"NIM1759069","token_address":"0x39cb30779016a87859ce1dfd573bcb94901f277f","type":"artist","uuid":"cf2158f3-3c89-4e42-b9ae-f1f26b016d4a"}
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 0xc947453ef060223d852d8ce85d2fb03d599ee1c813d91eea1f5efdd6e4ee5499. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf2158f3-3c89-4e42-b9ae-f1f26b016d4a.json and https://artists.proofprofile.net/proofs/artist/cf2158f3-3c89-4e42-b9ae-f1f26b016d4a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
  text: {"copyright_id":"0xc947453ef060223d852d8ce85d2fb03d599ee1c813d91eea1f5efdd6e4ee5499","name":"John Calhoun","registered_at":"2026-06-21T00:11:48Z","symbol":"NIM1759069","token_address":"0x39cb30779016a87859ce1dfd573bcb94901f277f","type":"artist","uuid":"cf2158f3-3c89-4e42-b9ae-f1f26b016d4a"}
album: Written
  type: MusicAlbum
  date published: 2017-03-29
album: Written
  type: MusicAlbum
  date published: 2017-03-29
album: Written
  type: MusicAlbum
  date published: 2017-03-29
album: The Good Guys
  type: MusicAlbum
  date published: 2017-03-30
album: The Good Guys
  type: MusicAlbum
  date published: 2017-03-30
album: The Good Guys
  type: MusicAlbum
  date published: 2017-03-30
album: That Ain't Enough
  type: MusicAlbum
  date published: 2017-04-12
album: That Ain’t Enough (feat. Tyler Thomas & Jitta On The Track)
  type: MusicAlbum
  date published: 2017-04-12
album: That Ain't Enough
  type: MusicAlbum
  date published: 2017-04-12
album: That Ain't Enough (feat. Tyler Thomas & Jitta on the Track)
  type: MusicAlbum
  date published: 2017-04-12
album: Five In The Morning
  type: MusicAlbum
  date published: 2017-12-12
album: Five in the Morning
  type: MusicAlbum
  date published: 2017-12-12
album: Five In The Morning
  type: MusicAlbum
  date published: 2017-12-12
album: Five In The Morning
  type: MusicAlbum
  date published: 2017-12-12
album: Know My Name
  type: MusicAlbum
  date published: 2018-03-14
album: Know My Name
  type: MusicAlbum
  date published: 2018-03-14
album: First Law
  type: MusicAlbum
  date published: 2019-03-06
album: First Law
  type: MusicAlbum
  date published: 2019-03-06