Signatures of a Chiral Kerr-Bounce: Torsion-Induced Cosmic Birefringence, CMB Anomalies, and Anisotropic Gravitational Waves

The standard cosmological model, while highly successful, struggles with the initial singularity and unexplained large-scale spatial anomalies. Building upon a previously established framework where the Einstein-Cartan-Sciama-Kibble (ECSK) spin-torsion coupling replaces the Big Bang singularity with a deterministic quantum bounce at a critical radius of 161.6 km, this paper extends the model to a rotating progenitor. By postulating that the bounce originated within a Kerr black hole, we propose that the conservation of extreme angular momentum during the torsion-dominated phase imparts a macroscopic chirality and a preferred directional axis to the emergent spacetime. We demonstrate that this primordial rotation naturally unifies and explains three major observational anomalies: (1) The spatial alignment of the CMB quadrupole and octupole moments (the "Axis of Evil"), (2) The observed cosmic birefringence angle (beta ≈ 0.35°), and (3) The necessity for an anisotropic signature in the nano-Hertz stochastic gravitational wave background (SGWB) currently observed by NANOGrav. This framework transitions the ECSK Kerr-Bounce hypothesis from theoretical geometry into the realm of testable, multi-messenger astrophysics.