Title: Ringdown Overtones as a Candidate Signature for Tension-Mediated Hawking Radiation: A Blind Prediction Validation Description / Abstract: We propose that Hawking radiation and the Theory of Cosmic Architecture (ToCA) are fundamentally unified through the tension minimization principle. By identifying the imaginary action with integrated tension ($S_I = \kappa \int D dt$), we suggest that Hawking radiation acts as the inevitable mechanism for resolving frozen tension gradients in black hole horizons. This paper presents a scaling hypothesis whereby gravitational wave ringdown overtones serve as a proxy for near-horizon tension relaxation. Using a strict calibration set of pre-2024 merger events only (GW150914, GW170814, GW190521), we perform a blind prediction test for the recent high-SNR event GW250114 ($M_f \approx 73 M_\odot$). Key Results: The blind prediction ($D_{floor} = 0.139 \pm 0.017$) is confirmed by observational data proxies ($D_{obs} = 0.210 \pm 0.050$) within 1.35σ. This successful blind test supports the hypothesis that ringdown residuals encode the Hawking temperature scaling ($T_H \propto M^{-1}$). Pre-Registration: To ensure methodological rigor and falsifiability, this document formally locks predictions for future LIGO O4 events based on the un-updated pre-2024 model. These predictions serve as a pre-registered hypothesis test for the ongoing observing run.