This publication extends the Predictive Semiotic Extraction (PSE) framework first articulated in Predictive Semiotic Extraction: A Framework for Anticipating Institutional Signal Capture (E. R. B., 2025). It develops that foundation into an applied governance model for evidentiary authorship, analyzing how institutions register and re-circulate emerging cultural signals before attribution is formally established. The paper proposes predictive semiotics as a documentation method to secure provenance integrity within accelerated cultural systems. By combining timestamped authorship, metadata governance, and open-access archival practices, it outlines a structural approach to cultural accountability that aligns creative innovation with verifiable public record. Citation:Calder, A. R. (2026). Predictive Semiotics and Institutional Signal Anticipation: Governance Implications for Evidentiary Authorship and Cultural Accountability. Ordinaria Research Group. DOI: [10.5281/zenodo.18098081] Keywords:cultural governance, predictive semiotics, predictive semiotic extraction, provenance, institutional accountability, authorship, metadata governance