This work presents a cross-domain analysis of coherence and information dynamics across biological, quantum, condensed-matter, acoustic, solar, and gravitational systems. Using open datasets from LIGO–Virgo (GWOSC), IBM Quantum, BiSON, Materials Project phonon spectra, EEG repositories, geomagnetic sensors, and acoustic response archives, we identify a universal negative scaling between spectral coherence and an information-like entropy measure. The manuscript develops a coherence-based field framework and derives a phenomenological gravitational frequency evolution relation for post-merger echo bands. Echo-band frequency drift signatures are extracted from gravitational wave events and compared with the predictions of the coherence relaxation model. Across all domains, coherence–information scaling exponents cluster around a consistent value (beta approximately negative 0.06), indicating a shared underlying structure in the evolution of coherence-bearing dynamical systems. The work proposes a unified coherence–information representation that captures this behavior and outlines predictions for upcoming gravitational wave observations. This Zenodo release includes: • The full manuscript (PDF)• Supplementary Information (SI)• References and data-source links• High-level descriptions of analysis pipelines for reproducibility• Licensing and archival metadata All datasets referenced in this work are fully open access and cited accordingly. No proprietary code or restricted content is included.