Mark Mast
type: MusicGroup
genre: singer-songwriter
popularity: 11
followers: 34
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x89587f4045c84218d8d957f2546e509faec434dd0cea170ec5ae598b5d25807e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953704
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953704
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7a8ca207-b8aa-4e3f-a598-3d5266524fb5.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7a8ca207-b8aa-4e3f-a598-3d5266524fb5.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7a8ca207-b8aa-4e3f-a598-3d5266524fb5
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T22:58:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x89587f4045c84218d8d957f2546e509faec434dd0cea170ec5ae598b5d25807e","name":"Mark Mast","registered_at":"2026-06-14T17:24:05Z","symbol":"NIM0523571","token_address":"0x01d4fcc3b1e1e7b8063547dfe3d6a8d8e9e0ff18","type":"artist","uuid":"7a8ca207-b8aa-4e3f-a598-3d5266524fb5"}
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 0x89587f4045c84218d8d957f2546e509faec434dd0cea170ec5ae598b5d25807e. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a8ca207-b8aa-4e3f-a598-3d5266524fb5.json and https://artists.proofprofile.net/proofs/artist/7a8ca207-b8aa-4e3f-a598-3d5266524fb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T22:58:38Z
  text: {"copyright_id":"0x89587f4045c84218d8d957f2546e509faec434dd0cea170ec5ae598b5d25807e","name":"Mark Mast","registered_at":"2026-06-14T17:24:05Z","symbol":"NIM0523571","token_address":"0x01d4fcc3b1e1e7b8063547dfe3d6a8d8e9e0ff18","type":"artist","uuid":"7a8ca207-b8aa-4e3f-a598-3d5266524fb5"}