The Entanglement-Weighted Operator Geometry (EWOG) framework posits that the universe is a self-correcting quantum system whose evolution is governed by the Entanglement Weight (W), a measure of quantum coherence and information stability. This paper presents a rigorous, first-principles derivation of the entire cosmological timeline—from the Planck epoch to the present—within the EWOG paradigm. We show how:· Spacetime emerges from entanglement gradients without initial singularities.· Cosmological epochs are defined by phase transitions in the entanglement field.· Observational anomalies (JWST early galaxies, Hubble tension, dark energy, dark matter) are naturally explained.· Fundamental constants arise from information-theoretic optimization.Each epoch is derived mathematically from the EWOG action and field equations, with observational predictions and falsifiability criteria.