Artian A1 Earth-Flyby Handshake Preregistration: A Prospective Dual-Link Test of the QTT Two-Clock Map

One spacecraft can carry two physically different radio handshakes. Their difference is a new, geometry-locked clock test. Historical Earth-flyby residuals cannot decide this test because they contain only one physical radio-clock history. This preregistration instead requires two simultaneous links on the same spacecraft: one continuously phase connected and one physically clock gated and reacquired. Each route is repeated with the electronics roles exchanged, and at least two nondegenerate route orientations are required. Both links use the same frozen conventional orbit, light-time, Earth-rotation, station, media, relativistic, and transponder model. For route \(p\), crossed hardware assignments \(A,B\) form \[ d_p=\frac{\Delta y_{p,A}+\Delta y_{p,B}}{2}, \] while the source geometry is computed before residuals are opened: \[ g_p=\left\langle2\,\frac{(\Omega_E\times\mathbf r_p) \cdot\mathbf v_p}{c^2}\right\rangle_p. \] A single free-offset flyby is not eligible, because \[ (\Omega_E\times\mathbf r)\cdot\mathbf v =\Omega_E\cdot(\mathbf r\times\mathbf v) =\Omega_E\cdot\mathbf h \] is nearly constant on a central-force arc. Crossed electronics cancel the leading hardware offset; opposite route orientation isolates the geometry-odd coefficient. After a frozen nuisance projection, the registered coefficient is \[ \boxed{ \widehat\kappa_{\rm A1}= \frac{\mathbf g^{\rm T}C^{-1}P_\perp\mathbf d} {\mathbf g^{\rm T}C^{-1}P_\perp\mathbf g}.} \] The prospective fork is \[ \boxed{ H_{\rm ordinary}:\widehat\kappa_{\rm A1}=0, \qquad H_{\rm QTT-A1}:\widehat\kappa_{\rm A1}=1.} \] The geometry amplitude is not fitted. A bare five-standard-deviation separation requires \(\sigma(\widehat\kappa_{\rm A1})\leq0.2\); the recommended design target is 0.1. Crossed roles, route orientation, station transfer, loopback, duplicate modes, and a sign-reversed holdout must preserve the coefficient. Three adversarial audits reject software-only arc splitting, the single-route/free-offset degeneracy, omitted conventional navigation terms, channel-specific source retuning, flexible geometry-absorbing nuisances, and untracked gate/reacquisition transients. Historical flyby and public radio-science records remain useful design constraints, but receive ARCHIVE_INELIGIBLE_NO_A1_VERDICT. Scientific status: matched-filter theorem and synthetic null/QTT fixtures closed; physical simultaneous dual-link hardware, mission covariance, and empirical verdict pending. Concept DOI: 10.5281/zenodo.21674819 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. Clock, ruler and signal-recovery qualification. Both registered predictions are constructed at the raw detector with explicit proper-time, coordinate-time, worldline, ruler and synchronization conventions. Each relativistic effect is counted once. Independently calibrated corrections carry their uncertainties through the common comparison; the tested rows cannot train a normalization that forces either answer. Blind recovery is required separately for both alternatives at every predeclared operating setting. The inherited targets and decision rules remain fixed. The included design study makes sensitivity explicit: for the Two-Test Gram classifier, a total ratio uncertainty of 0.0013 gives approximately 88.9% QTT-branch and 94.1% ordinary-branch power under the stated ideal model. These are conditional detection probabilities, not probabilities that a theory is true, and each instrument retains its own classifier. The complete apparatus packet must be sealed before acquisition and target access; historical campaign rules remain preserved. Reconstruction entry point. Start with current/CURRENT_RELATIVISTIC_EXECUTION.md in the ZIP. The shared execution contract refers once to the development filename CURRENT_EXECUTION_RC.md; that reference means CURRENT_RELATIVISTIC_EXECUTION.md in this release. The packaged README names the correct file. This navigation correction does not change the deposited files, scientific requirements or historical seals.