Twelve Independent Probes Consistent with the Parameter-Free U-Cell Model: Ωm = 0.3166, w = −1, Ωb h² = 0.02246

The U-Cell Model (UCM) derives Ωm = 0. 3166, w = −1 (exact), and Ωb h² = 0. 02246 from a single substrate constant fcold = √ (2−π/2), with zero free cosmological parameters. We test these predictions against twelve independent probes spanning fifteen orders of magnitude in physical scale: from Big Bang Nucleosynthesis (z ∼ 10⁹, t ≈ 3 min) to dwarf galaxy rotation curves (r ∼ 1 kpc). Seven probes with clean χ² structure yield a cumulative ΔBIC = +27. 1, constituting decisive Bayesian evidence on the Jeffreys scale in favour of the UCM over best-fit Planck ΛCDM. Five additional probes (Planck 2018 CMB acoustic scale, ACT DR6 equation of state, KiDS Legacy S8, BBN baryon density, and LITTLE THINGS DM core structure) are each consistent with the UCM at ≤ 1. 3σ. Every individual ΔBIC > 2. The BIC advantage is structural: Ωm = 0. 3166 is an algebraic theorem, not a fit. No single systematic can simultaneously bias all seven BIC probes, which span three independent BAO instruments, three independent SN photometric pipelines (SALT2. 4, DES photo-classifier, SALT3+UNITY1. 5), and a direct H (z) measurement. A dedicated section addresses the 4. 2σ Cooke et al. (2018) deuterium tension: Ωb h² = 0. 02246 follows uniquely from CLASS + CMB acoustic scale + fixed Ωm, with no free parameter. Planck ΛCDM is itself 2. 9σ from Cooke et al. (2018) ; the PDG-recommended Yeh et al. (2023) weighted mean is consistent with UCM at 0. 9σ. A clear falsification criterion is stated: Ωb h² < 0. 0220 at 3σ from a CMB-independent measurement would falsify the UCM baryon density. The single algebraic constant fcold = √ (2−π/2) = 0. 6551 uni