Searching for CCEGA Radion Echoes in LIGO/Virgo O3 and O4 Data: A Falsification Protocol

We present a concrete observational protocol for testing the CCEGA brane-world framework using publicly available gravitational wave data. CCEGA predicts post-merger gravitational wave echoes at t_echo ≈ 14 ms with radion sidebands Δf ∈ [240, 2400] Hz — a specific, falsifiable signature of 5D Randall-Sundrum geometry. We describe event selection criteria, frequency band, temporal window, and falsification conditions. All data are available via GWOSC. This paper is an open invitation to any group with existing LIGO data analysis infrastructure.