Ken Marks
type: MusicGroup
description: Ken Marks (born 13 December 1951) is a former Australian rules footballer who played with Footscray in the Victorian Football League (VFL). Marks started his league career at Fitzroy and was a Morris
popularity: 4
followers: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4c645cc6f1ee881cc7c1b21199ce966b0d77431b615fcd96c198bf61e0e08859
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953947
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953947
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2441d650-faa1-4358-9d5c-c44c9242007a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2441d650-faa1-4358-9d5c-c44c9242007a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2441d650-faa1-4358-9d5c-c44c9242007a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T13:14:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4c645cc6f1ee881cc7c1b21199ce966b0d77431b615fcd96c198bf61e0e08859","name":"Ken Marks","registered_at":"2026-06-16T02:04:16Z","symbol":"NIM0903051","token_address":"0x0fef7c9b038d6b29ae14b068c78ef8a9038e4b41","type":"artist","uuid":"2441d650-faa1-4358-9d5c-c44c9242007a"}
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 0x4c645cc6f1ee881cc7c1b21199ce966b0d77431b615fcd96c198bf61e0e08859. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2441d650-faa1-4358-9d5c-c44c9242007a.json and https://artists.proofprofile.net/proofs/artist/2441d650-faa1-4358-9d5c-c44c9242007a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0x4c645cc6f1ee881cc7c1b21199ce966b0d77431b615fcd96c198bf61e0e08859","name":"Ken Marks","registered_at":"2026-06-16T02:04:16Z","symbol":"NIM0903051","token_address":"0x0fef7c9b038d6b29ae14b068c78ef8a9038e4b41","type":"artist","uuid":"2441d650-faa1-4358-9d5c-c44c9242007a"}