Dark Matter Is Ordinary Matter: The 85:15 Ratio as Cross-Brane Perception Artifact in Randall–Sundrum Geometry

We demonstrate that the observed dark matter signal—galaxy rotation curves, cluster dynamics, gravitational lensing, CMB power spectrum—arises as a cross-brane gravitational amplification artifact in the RS two-brane geometry with Z₂ orbifold symmetry. The Z₂ symmetry requires identical structure on both branes. Gravitational signals crossing the warped bulk arrive amplified in mass by kL/2π ≈ 5.9, producing the observed dark-to-visible ratio, but exponentially displaced in location by the warp factor δ(y) = e^(ky). The mass is amplified; the location is destroyed. This dual distortion—mass amplification plus locational displacement—produces the diffuse, offset halos that define the dark matter signal. The true mass distribution is 1:1; the 85:15 ratio is a perception artifact of imperfect cross-surface information transfer. We predict: (i) permanent null results in all dark matter searches; (ii) halo profiles computable entirely from baryonic distributions; (iii) dark matter distribution tracing visible structure exactly.