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
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
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).