Matthew Porter
type: MusicGroup
description: Matthew Sheldon Porter (1858 – September 28, 1906), was an American Major League Baseball player who, for a short time in , managed and played for the Kansas City Cowboys of the Union Association. Du
popularity: 5
followers: 11
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe2db472bab44d4ffc5e8d4ec9f9e7eb7f8799be2729779fb4072e812fafa5b9c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954647
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954647
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d5e2501d-c97b-425c-995f-642dc3a523d9.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d5e2501d-c97b-425c-995f-642dc3a523d9.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d5e2501d-c97b-425c-995f-642dc3a523d9
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T04:36:58Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe2db472bab44d4ffc5e8d4ec9f9e7eb7f8799be2729779fb4072e812fafa5b9c","name":"Matthew Porter","registered_at":"2026-06-21T03:03:11Z","symbol":"NIM1799704","token_address":"0x2166327aa09ee93659cb556b79cbb0dc6bcdfd9c","type":"artist","uuid":"d5e2501d-c97b-425c-995f-642dc3a523d9"}
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 0xe2db472bab44d4ffc5e8d4ec9f9e7eb7f8799be2729779fb4072e812fafa5b9c. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5e2501d-c97b-425c-995f-642dc3a523d9.json and https://artists.proofprofile.net/proofs/artist/d5e2501d-c97b-425c-995f-642dc3a523d9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T04:36:58Z
  text: {"copyright_id":"0xe2db472bab44d4ffc5e8d4ec9f9e7eb7f8799be2729779fb4072e812fafa5b9c","name":"Matthew Porter","registered_at":"2026-06-21T03:03:11Z","symbol":"NIM1799704","token_address":"0x2166327aa09ee93659cb556b79cbb0dc6bcdfd9c","type":"artist","uuid":"d5e2501d-c97b-425c-995f-642dc3a523d9"}