This record contains the raw experimental data, OpenQASM 2.0 circuit specifications, and analysis results for hardware circuits executed on IBM Quantum processors Fez Heron r2 and Marrakech Heron r2, as part of the PSI-ISAPP experimental validation program. IBM Fez circuits were designed to test the causal relationship between quantum mutual information (I_Q) and effective decoherence rate (γ_eff) across five quantum states (separable, W-type, GHZ-type), and to attempt extraction of the informational shielding constant λ. Results are consistent with the PSI-ISAPP saturated exponential model. IBM Marrakech circuits were executed for scalability testing across circuit depths and independent confirmation of the I_Q effect. The qualitative pattern is consistent with PSI-ISAPP predictions. Quantitative λ extraction on this platform remains an open objective. These results are linked to the primary dataset and theoretical framework in the companion Zenodo record (DOI: 10.5281/zenodo.20561569 All raw IBM Quantum job files, circuit diagrams, and measurement data are included for complete reproducibility. The experimental and simulation results consistently demonstrate that Quantum Mutual Information (I_Q) acts as a physical modulator of decoherence, establishing an information-shielding mechanism that protects the persistence of quantum states against environmental noise. Ignacio Giménez Moreno. igimor1@gmail.com ORCID: 0009-0007-2052-1291