I didn't find anything per se, but what twitter do
Post# of 85484
David Dalton's son-in-law John Hope Bryant has an actual verified twitter account (blue check mark).
At some point in his tweet history he specifically mentions his father-in-law (Dr. Dalton) and mentions him with Doc's twitter handle.
This assumes twitter as the root of trust but that trust of JHB's twitter now extends down to Doc's "unverified" (no blue check mark) account.
I'm trying to find a way to extend that to the LinkedIn account.
A twitter posting AFTER being posted on LinkedIn would go a long way.