{"protocol_id":"arena_duel_v2","version":"2.0.0","spec_hash":"897f5f9b5f21302344ae793686f6e61f98078481bdf303ff56ff9e1829327340","spec":{"description":"Same Target Duel with separate invitation and match clocks.","evidence":"shared target commitment plus both prediction records; public event API","invitation_rule":"expires after 24 hours; creator may cancel before acceptance; no rating change","prediction_locked":"neither participant sees the other's predictions before locking their own","scientific_criterion":"none; Arena ranking is not scientific evidence","scoring":"one point per correct prediction","target_method":"shared concealed hardware-QRNG block committed before either participant predicts","tie_rule":"equal completed totals draw; no finishers at deadline makes the match void","trials":100,"winner_rule":"greatest completed total; exactly one finisher at deadline wins by forfeit"},"published_at":"2026-09-15T14:11:23.125Z"}