The Dark Matter Ratio and Hubble Tension Are the Same Measurement.

We present a falsifiable prediction: the cosmological Dark Matter-to-Baryon ratio and the Hubble tension are not independent anomalies. They are dual measurements of a single underlying quantity—the Registry Latency parameter λ—and must co-vary exactly according to: (DM/B − 5.0) / 5.0 = ΔH₀ / H₀ = λ If future surveys (DESI, Euclid, JWST) revise either quantity, the other must shift in lockstep — or the framework is falsified. This prediction, derived from the Temporal Selection Framework (TSF), distinguishes TSF from all existing Hubble tension proposals. If future surveys (DESI, Euclid, JWST) revise either quantity, the other must shift in lockstep—or the framework is falsified. This paper is part of the Temporal Selection Framework (TSF) series: Paper 1: (this paper): The co-variation prediction and formal derivationsPaper 2: The Registry Mechanism — Causal Fermion Systems correspondence and redshift-dependent tension prediction. DOI: 10.5281/zenodo.19561062Paper 3: Grounding TSF Conjectures in Established Physics — five research directions including holographic bounds, Hamming distance, York Time, and Landauer's Principle. DOI: 10.5281/zenodo.19673391Introduction: The Universe Has a Clock Speed — plain-language overview. DOI: 10.5281/zenodo.19562727 The series listing at the bottom is the most important addition — it turns each individual record into a signpost for the whole framework, so a reader who finds any one paper can navigate to the others easily.