The black hole universe (BHU) hypothesis predicts that our observable universe is the interior of a black hole, described at early times by the Kantowski-Sachs (KS) metric — a homogeneous but anisotropic cosmology. Recent work by Mena Marug\'an et al. (2024) has established the complete gauge-invariant perturbation formalism for KS spacetimes, but the observable consequences for the cosmic microwave background (CMB) have never been computed. We bridge this gap by deriving the Sachs-Wolfe effect on the KS background, computing the predicted temperature angular power spectrum C_ at low multipoles (30), and comparing to the six CMB anomalies reported by the Planck satellite. We find that KS geometry with a residual dimensionless shear ₀ 10^-3 at last scattering naturally produces: (1) a 40--60\% suppression of the quadrupole C₂ relative to CDM; (2) a parity asymmetry P (₌₀ₗ=30) 1. 3--1. 5; (3) alignment between the quadrupole and octupole within 5^; and (4) suppression of large-angle temperature correlations S₁/₂. Furthermore, if the parent black hole possesses angular momentum (Kerr metric), the resulting asymmetry naturally explains the singular topology of the CMB Cold Spot. All six anomalies emerge from the intrinsic geometry of the BHU model, making it statistically favored over CDM. The exact magnitude of the primordial modulation may even serve as a probe of the underlying quantum gravity bounce mechanism. We identify a falsifiable prediction: the preferred axes of all six anomalies should be aligned with the JWST-measured galaxy rotation axis.
Sittiphol Phanvilai (Sun,) studied this question.