Schema.org property linking entity representations across platforms. Add to Organization/Person schema: “sameAs”: [“https://www.wikidata.org/wiki/Q…”, “https://linkedin.com/…”, “https://crunchbase.com/…”]. Each link is a corroboration signal. Comprehensive sameAs linking enables AI systems to merge signals from multiple sources. Minimum: Wikidata, LinkedIn, primary social profiles. Advanced: Crunchbase, industry directories, ORCID (for founders). Missing links fragment entity signal. Audit annually and add new authoritative profiles.