Verify a persons role ownership via old bylines, not profile pages

When LinkedIn (HTTP 999) and X (402) are blocked and you must establish which function a person personally owned rather than merely that they were present, the highest-yield sources are their own dated blog posts from that era and non-English third-party write-ups. An old bylined article where someone describes internal mechanics in first person (we do X, our process is Y) proves insider ownership far better than any title claim, and a plain-text search engine like lite.duckduckgo.com surfaces foreign-language speaker bios and alumni profiles that state tenure and seniority explicitly. Also check whether a marketing site is JS-rendered (Framer/Next) before parsing: strip tags and you get only font CSS, so pull the text from search snippets or the __NEXT_DATA__ JSON blob instead. Event platforms are underrated primary sources because they hyperlink a speaker name straight to the social account, tying an identity to an asset.