Cornerstone builds a verified portfolio of your real estate. You own everything known about your property, and you share it only with the people you trust.
Your home's record sits in pieces across the companies that finance, insure, and assess it, never assembled for you. Even the free home value sites make their money selling it, as a lead or a mortgage offer.
Cornerstone assembles the whole record, verifies it, and puts it in your hands.
Everything known about a property, in one place, each fact carrying its source.
Proof of who you are and what you own, digitally signed, so whoever receives them knows where they came from.
The records behind the portfolio: the deed and permits, plus private ones like a mortgage statement.
The live record of the property: assessed value, taxes, permits, lot size, past sales, refreshed over time.
Value, equity, liens, and taxes across every property, in one place and kept current.
Make real estate decisions from a verified record, not scattered paperwork and guesses.
Keep family and co-owners in the picture, so what you own is clear for succession and whatever comes next.
Give a professional, a lender, or family exactly what they need, and revoke it anytime.
Share everything or a single fact. You pick what's visible, and whoever you share with, family, a professional, a lender, sees only that. Revoke it anytime.
Every portfolio is built by Cornerstone Data Studio. Ask it about an address, REST for systems or MCP for agents, and it reaches the sources that know that property, reconciles them, and returns one record with every field traced to its source. Verifiable credentials secure it, so trust does not depend on who is asking.
One API in front, a continent of sources behind it. See Data Studio
Realtors, lenders, and brokerages give clients a verified portfolio they keep, instead of renting those same clients back as leads from a listing site. Data providers reach homeowners directly, with their source attached.
Everything known about your real estate, in one place, shared on your terms.
Get your portfolioProvide the data that goes into a portfolio, or deliver verified portfolios to the clients you serve.
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