Cosmology as a Holographic Projection on a Black Hole Horizon

This preprint presents a falsifiable holographic model in which dark energy and dark matter arise as imprints of mass accretion onto the event horizon of a supermassive black hole in a parent spacetime (bulk). We derive the observed value and time evolution of the cosmological constant Λ(t), reproduce the Navarro–Frenk–White profile from horizon geometry, and show automatic suppression of dark energy at early cosmic times. The model yields four quantitative predictions testable by 2035: (1) alignment of CMB large-scale anomalies with the rotation axis of Sgr A*, (2) universal deviation of black hole shadow shapes from Kerr geometry, (3) secular drift of galaxy cluster turnaround radii, and (4) a 2–3% deviation in H(z) at 0.5 < z < 1.5. All claims are dimensionally consistent and observationally verifiable. Full derivations, parameter estimates, and ontological discussion are provided in the companion monograph (DOI: 10.5281/zenodo.18644875).