Matthew Croke
type: MusicGroup
popularity: 6
followers: 208
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc2c6a0106868babe4905f7fb63b93acdd24bbe4b4605d2f37dd1fab91c1b7416
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953867
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953867
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/05cb9571-9590-4c82-a187-67b3d7f8cc7d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/05cb9571-9590-4c82-a187-67b3d7f8cc7d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/05cb9571-9590-4c82-a187-67b3d7f8cc7d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T01:09:47Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc2c6a0106868babe4905f7fb63b93acdd24bbe4b4605d2f37dd1fab91c1b7416","name":"Matthew Croke","registered_at":"2026-06-15T15:38:16Z","symbol":"NIM0753658","token_address":"0x6b739b75f99b7f3222a1809c75d346b0f6a1d085","type":"artist","uuid":"05cb9571-9590-4c82-a187-67b3d7f8cc7d"}
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 0xc2c6a0106868babe4905f7fb63b93acdd24bbe4b4605d2f37dd1fab91c1b7416. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05cb9571-9590-4c82-a187-67b3d7f8cc7d.json and https://artists.proofprofile.net/proofs/artist/05cb9571-9590-4c82-a187-67b3d7f8cc7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T01:09:47Z
  text: {"copyright_id":"0xc2c6a0106868babe4905f7fb63b93acdd24bbe4b4605d2f37dd1fab91c1b7416","name":"Matthew Croke","registered_at":"2026-06-15T15:38:16Z","symbol":"NIM0753658","token_address":"0x6b739b75f99b7f3222a1809c75d346b0f6a1d085","type":"artist","uuid":"05cb9571-9590-4c82-a187-67b3d7f8cc7d"}
album: Only Dreaming
  type: MusicAlbum
  date published: 2018-12-07
album: Mum
  type: MusicAlbum
  date published: 2025-09-21