The Seashell-Universe Model: Evidence of Anisotropic Modulation in GRB 221009A Spectral Residuals via a Helical Kinematic Spacetime Model with Asymptotic Exponential VSL Profile

This paper presents a fundamental refinement of the helical spatiotemporal metric (formally conceptualizedas the Seashell-Universe Model) by introducing an asymptotic exponential VariableSpeed of Light (VSL) profile to govern dynamic photon mass modulation. Previous attempts to reconcilethe model with experimental photon spectra from the gamma-ray burst GRB 221009A (“TheBOAT”) utilizing a rigid Proca mass formulation yielded severe standard errors, indicating localstochastic divergence. To resolve this microscopic inconsistency, we reformulate the wave equationvia a dynamic mass mechanism where the effective photon mass smoothly vanishes in the contemporaryera. We demonstrate that this non-linear VSL coupling preserves the model’s cosmologicaltriumphs—namely, the geometric resolution of the Cosmic Microwave Background (CMB) horizonparadox and an elegant alternative explanation for the Hubble tension—while rigorously matchinghigh-precision local constraints from Coulomb’s law, pulsar dispersion, and Baryon AcousticOscillations (BAO).