Artian A1 Quantum-Clock Reference-Switch Theorem: A Prospective Delocalized-Clock Test of the QTT Two-Clock Projection

A quantum clock can follow two proper-time histories. Can one completed coherence also distinguish two physical reference classes? Quantum-clock interferometry already supplies the standard carrier relation \(\Delta\phi_{\rm clock}=\omega_0\Delta\tau.\) This preregistration keeps that relation intact and asks a separate question. The same atomic transition and path geometry are executed through four physical input/output terminal histories, \(\tau\tau,\qquad \tau T,\qquad T\tau,\qquad TT.\) For each history and reversed proper-time geometry, the laboratory fits the first complex clock-coherence phasor and forms \(D_{ab}=\sqrt{|Z_{ab}^{+}Z_{ab}^{-}|}.\) The registered reference-switch statistic is \[ \boxed{ R_{\rm qc,clk}= \frac{1}{\mathcal N_{\times}^{\rm ord}} \sqrt{\frac{D_{\tau T}D_{T\tau}} {D_{\tau\tau}D_{TT}}}.} \] After a target-blind ordinary cross-history map, the fixed prospective fork is \[ \boxed{ H_{\rm ordinary}:R_{\rm qc,clk}=1, \qquad H_{\rm QTT-A1}:R_{\rm qc,clk}=\cos\!\left(\frac{\pi}{8}\right).} \] The alternatives differ by 7.6120467%. A bare five-standard-deviation separation requires \[\sigma(R_{\rm qc,clk})\leq0.0152241,\] and the recommended design target is 0.005. The proper-time phase is a common carrier check, not the A1 discriminator. The release includes three adversarial audits. It requires a physical hardware graph for the \(T\) and \(\tau\) terminal classes, derives the readout exponent from a first complex phasor, and qualifies preparation and calibration by their physical transfer, not by angle alone. A target-inserting primary operation or target-trained correction remains ineligible. Any failed eligibility gate returns INELIGIBLE_NO_THEORY_VERDICT rather than a false rejection of A1. Scientific status: theorem and estimator closed; carrier technology plausible; physical four-terminal hardware map and laboratory dataset pending. No existing quantum-clock record is claimed as A1 evidence. Concept DOI: 10.5281/zenodo.21674815 Main book: Quantum Traction Theory: Main Book v10.01 Website: quantumtraction.org · Two Universes · Lexicon · Observatory The public files are the paper PDF first and the complete reconstruction ZIP second. Version 1.1: operation qualification and retained observations The numerical targets, ratio orientation, decision regions and historical seals are unchanged. A 22.5-degree or 45-degree component is no longer excluded by its angle alone: its physical transfer must be independently established. Common-operation cancellation and signal-preserving calibration are proved; both hypotheses must remain identifiable. Every acquired record is retained. After authorized unblinding, QTT-like, ordinary-like and unexpected outcomes are reported, including observations that do not qualify for a theory verdict. This is a prospective amendment, not a retrospective resealing of data.