Hardware Validation Addendum: Z3 Sector Structure and Encrypted Cloning Bridge on IBM Heron r3

We report two independent hardware validation results on IBM Heron r3 quantum processors (ibm_pittsburgh,156 qubits) that strengthen the connection between the binary icosahedral group 2I and quantum informationprotocols. First, a pinned-layout shadow tomography experiment confirms all five predictions of the Z₃ sectorinterpolation model: entropy trimodality (ΔS = +0.197, bootstrap CI excludes zero), K₆ charge spectrum selectionrule (Q=2 = 0 across 163,840 shots at four CPHASE phases), pairwise connected correlation separation (R_encspans three orders of magnitude across sectors), and restored conjugate symmetry (|ΔS| = 0.029 < 0.03). Second,retroactive analysis of pairwise connected correlations establishes the encryption ratio R_enc =|⟨YY⟩_conn|/|⟨XX⟩_conn| as a diagnostic bridging the Yamaguchi-Kempf encrypted cloning protocol [PRL 136,010801 (2026)] to Z₃ sector structure. The TAO sector (θ = π/3) yields R_enc = 0.755 (ideal: 0.754, deviation0.1%), while the CZ sector (θ = π) yields R_enc = 125.2 (ideal: ∞), confirming opposite correlation structures. TheY-K scaling result at n=5 (R_enc = 39.5) maps to the CZ-like sector, consistent with coset averaging over [2I:2T] =5 driving correlations toward maximal encryption.