Mechanical Ontology of Black Holes: Singularity Resolution in Geometric Response Cosmology (GRC)

Within the framework of Geometric Response Cosmology (GRC), we present a mechanistic interpretation of gravitational phenomenology that achieves the empirical success of General Relativity through fundamentally distinct physical principles. We propose that the event horizon is not an internal volume, but a temporal discontinuity arising from the rupture of a scalar substrate. The observed mass manifests as emergent energy from the boundary condition of the substrate's edge, eliminating singularities. The exterior metric emerges from the kinematic restriction imposed by the temporal flow v_t(r) on the substrate.

Planck-scale corrections of the model are suppressed by ~10^-40 for all astrophysical black holes, which explains the century-long precision of GR while providing a physical cutoff. GRC reproduces the predictions of GR where it has been tested, diverging only at Planck scale where quantum gravity is expected. 

We demonstrate consistency with the observed masses of V616 Mon, Sgr A* and M87* (error < 22%), topological stability and thermodynamic coherence. The model offers an ontologically consistent alternative that grounds General Relativity in the mechanical dynamics of the substrate.