Data Assurance for one.
Not only data validation, but data assurance.
Very key. If you can't get some(one/company) to make sure the Validated Data to inter-operate 'tween the systems that needs it... and assuring the Data is valid both (or fifty) ways, you have nothing other than an ISLAND of non-minable/usable data.
If the court has to verify the data as its presented, it needs to have something to do that in real time... there is no way an ISLAND is going to do that...
PLUS, you have to have the data nearly available in at least in the Federal/State/County/City/Township level and you will have to *Start* at the Township Level. There are already some software packages out there that do this for the TAX Assessor's Office, but they have to have the data keyed in. The company that produces the most popular software in Michigan is: http://www.bsasoftware.com/ and they don't really have anything worth mentioning for scanning.
Trust me when I say, this software is very well made to the exceptions that make up 95% of the problems. There is no such thing as standard definitions for property descriptions. I have seen some property description that are 10 pages long single spaced and others being 1/2 line long, as I've previously dealt with it in the mass mail / fulfillment business. It sucks. There is no such thing as a simple problem when dealing with property titles.
Automated data input is something of a misnomer. You'll probably get maybe 75% of the incoming data mostly correct. Data Validation, when it comes to the *LEGAL* property descriptions has to be 100% bulletproof, not 98%, not 99%, not 99.999% but 100%. Relying on submitted data in a form doesn't cut it, you have to have a survey to be submitted separately to confirm the description. Which means handling it at least twice anyway even with automation... and then you have to validate the data additionally.
I'm not sure things will be as easy as you seem to think.