Looks like you have a potentially great business for corporate compliance, if you can answer with plausibly high confidence (or indemnify?).
I only occasionally research companies, and it's from an engineering&product perspective, aside from corporate ownership compliance. (For example, I was asked to vet a little-known company as a prospective partner, for building our cloud infrastructure atop theirs. One of the first rapid low-cost, high-value things I could do, besides looking at their docs and trying their demos, was to skim through the history of business news about them.)
Interesting. That's actually where we started. We were doing automated research on vendors from a TPRM perspective and looking for data points around organizational security / reputation. Examples - if the company had been hacked before / how they responded, do they have a CISO, nth party vendors, are they SOC2 / FedRAMP certified, etc. Basically, predictors of risk / stability.
We realized the underlying business graph was the bottleneck though, so that's been our focus for some time. With that in place, we're now coming full circle on the risk research standpoint.
On your comment about confidence / liability, we're actually having conversations around that now and getting feedback. First step is exposing all the research and evidence directly to build trust, which is what we're doing now for the new corporate hierarchy system.
When I used to work in credit control and accounts receivable, the use of D-U-N-S numbers was how we tied a lot of this information together. It is similar to how SSN are used by credit rating agencies but for businesses and global (unlike the EIN).