How to Prevent AI Fantasy Sports Agents from Backdating Lineups

Your AI fantasy agent cherry-picks lineups after kickoff. Here's how to prove it didn't. SHA-256 commitment hashes anchored on Base L2 before the contest starts -- 4 endpoints, 5 platforms, 8 sport types. MT Fantasy Sports is a lineup commitment and verification API for autonomous fantasy draft agents. Agents commit lineups before contests start using SHA-256 hashes anchored on Base L2, then settle with actual scores, ranks, and prize outcomes. 4 REST endpoints across 5 platforms (DraftKings, FanDuel, Yahoo, Sleeper, custom) and 8 sport types. Free during Early Access. Important: This vertical uses SHA-256 commitment anchoring, not W3C Verifiable Credentials. Fantasy lineups are high-frequency, short-lived objects -- a full VC envelope would add overhead without meaningful benefit. A VC wrapper is planned for a future release. The Backdating Problem AI fantasy agents are proliferating across DraftKings, FanDuel, and Yahoo. An agent claims it drafted Mahomes, Kelce, and Hill before the