A Null Test of the Static Wright–Fisher-to-OTOC Bridge in Radial Coherential Dynamics, and Exact Validation of Coherence-Modulated Influence Fronts

The late-time dissipative kernel of the Radial Coherential Dynamics (RCD) program is parabolic and does not generate a Lorentzian causal cone: signature is an input, not an output. This relocates the program's claim to a logically prior, operational question: can a coherence field organize a finite, switchable influence front in a local quantum dynamics, and does the specific spatial order produced by the RCD kernel matter beyond the distribution of coupling intensities? We study a transverse-field Ising chain and measure the infinite-temperature out-of-time-order correlator c (x, t) = ||Z0 (t), Zx||²F / (2·2N) as the primary observable, with frozen pre-registered gates. By exact operator evolution at N = 10, 12, 13 the front velocity in the clean channel is stable without appreciable size drift (v = 2. 000 -> 1. 980 -> 1. 980 at theta=0. 10, consistent with the exact maximal quasiparticle group velocity 2·min (J, h), distinct from and below the rigorous Lieb-Robinson bound), with OFF collapse to ~1e-13. Imposed coherence profiles modulate the front: an incoherent barrier blocks it, a coherence ramp slows it per a local WKB law, a uniform profile recovers the bare velocity. The coherence-to-coupling map Jᵢ = J0·sqrt (Cᵢ·C₈+₁) is a constitutive ansatz, not a derived or unique law. The decisive test (KS-C1a) was executed on a snapshot of the SEALED 2D Wright-Fisher/Allen-Cahn kernel (de Sitter, H=0. 02, seed 20260612, t*=1. 0 tH, central row coarse-grained 120->12). The candidate at t*=0. 5 tH failed the pre-quantum G0 gate; t*=1. 0 tH passed all three amended G0 conditions (CV (J) =0. 189, percentileS (C) =3. 5, xi=2). The result is a PRE-REGISTERED NULL (the RED branch): G1 PASS (real front obeys local WKB, R²=0. 913), G3 PASS (OFF 4. 8e-14), but G2 FAIL for all three J-shuffles — cross-prediction differences (dR² ~ 0. 03) and trajectory differences (Delta ~ 0. 03-0. 06) fell well below the pre-registered thresholds (0. 15 and 0. 10) on eight common interior sites. G4 was INDETERMINATE (the coarse-grained frozen snapshot contained no link below Jₘin=1e-6; declared before execution). A pre-specified diagnostic at row y=32 returned INDETERMINATE by dynamic censorship (extreme weak links left zero common interior sites), documenting an observability limit of the protocol in high-dynamic-range landscapes; implied kappa varied -4. 5% to +8. 1% across cuts, immaterial to the (differential) null. What survives: the operational front instrument (G1, G3), the perilla as a conditional predictive translator, and the local WKB law. What does NOT survive: the stronger statement that "the coherence-to-coupling map comes from the field. " The narrow statement earned by the data is that a static RCD coherence landscape can be inserted into the constitutive ansatz to predict a front locally, but its tested spatial ordering was not operationally distinguishable from shuffled orderings with the same coupling values. Three non-exclusive readings (genuine physical null / coarse-graining loss / cut-dependent dynamic-range limitation) are stated without selection; each requires a new pre-registered follow-up. We claim NO derived metric, NO derived time, NO physical light cone, NO emergent general relativity. The dynamically coupled bridge (KS-C1b) is named as a new hypothesis, not a validated continuation. Execution evidence is sealed by SHA-256 (manifest in the supplementary record). The KS-C1a protocol amendment v0. 5 was applied as recorded prior to execution; Appendix B reproduces the ratified pre-registration v0. 4 verbatim.