Mexico Title Issues--Mr. Man"your prodigy and I share some educational background."
My what? Oh, you mean daughter #1, the liar, er, lawyer.
To filch a line from L.P. Hartley, "Mexico is a different country. They do things differently there."
I'm not sure I can point you to any single source for the info you're looking for. Mexico does not yet have the readily accessible, fully networked searchable databases that we're used to in the U.S. and Canada. They're working in that direction, but it's in the early stages. I spoke to a Mexican programmer in Reynosa a few months ago, and he felt it would be years before all the data is collated and digitized for web-access.
Until very recently, real property did not change hands frequently in Mexico as it does here. For one thing, there was almost no such thing as a mortgage, or financing a home or farm. Land titles transferred seldom, and normally only in cash transactions.
So deeds and titles have been the stuff of dusty boxes in lawyers' offices and courthouses.
Mortgages are now available in some parts of Mexico, mainly the areas popular with gringo tourists. (the Baja, Sonora, Yucatan).
Property transfers in Mexico generally require more time and more people involved than here, and nothing gets done without cultivating a relationship with a notaria, or property attorney.
Mineral leases and mining rights are a completely different matter.
When it comes to mineral leases in Mexico, what little I know suggests that Mexican courts have tended to uphold mining companies' rights and interests in a way that's conducive to foreign direct investment. Beyond that, I stay away from explorecos that can't demonstrate clear and undisputed title to any leases.
The sites below have been of some use to me. You might find answers to specific questions by posting on forums they host.
https://www.mexonline.com/propmex.htm
https://www.mexconnect.com/mex_/realestatemexicoindex.html
https://www.yucatantoday.com/destinations/eng-real-estate-buying-property.htm
Good luck--
Gabe