This is what companies like Dunn & Bradstreet do, and the other old major merchant houses.
Things like Linkage Analysis, where they figure out which companies own which other companies, and trace down who actually owns a company.
It's human legwork to maintain their databases. Thus they get to charge money for queries against them.
So, I certainly hope that the major CAs are doing at least a paid check with one of the merchant houses before issueing EV certs, and anyone bundling together a group of CAs for others to trust should either be saying "don't trust us, this is just what we find convenient" (amateur, but sometimes appropriate) or should be doing the same due diligence.