Observational Signatures of a 24-Brane Multiverse from S_ab=0 in AdS5

We extend the AdS5 brane framework to a multiverse ensemble. Each brane n ∈ [1,24] represents a separate 4D universe with equation of state w_n(t) = -1 - (1/3)κ_g t φ^(n-12), where φ=(1+√5)/2 and our universe corresponds to n=12. Key prediction: Neighbor universe n=11 has CMB temperature T_11 = 1.69K vs our 2.73K. Zero free parameters. DESI DR2 chi^2/dof = 0.43 unchanged from the single-universe model. The model is falsifiable via cross-correlation of CMB cold spots with predicted T_n for adjacent branes. All derivations from c, G, hbar, φ only. No fitting. Not Still in progress