Data Source Integrity & Verification Hierarchy
SemioTrace strictly forbids unauthorized scraping of third-party portals (such as Zillow, Redfin, or Realtor.com). All platform recommendations originate from compliant, licensed, and publicly documented record feeds.
Licensed MLS / RESO IDX Listing Feeds
Direct participant data feeds adhering to the Real Estate Standards Organization (RESO) Web API standards. Provides active, pending, and closed status changes.
County Assessor & Property Appraiser GIS Records
Official municipal registries verifying legal parcel descriptions, historical deeds, assessed valuations, building permits, and annual tax assessments.
Licensed Foreclosure & Lien Data Feeds
Court clerk dockets tracking Notices of Default, Lis Pendens summons, scheduled trustee sales, and municipal code enforcement liens.
County Probate Court Estate Dockets
County court records documenting testate/intestate filings, issuance of Letters of Administration, Letters Testamentary, and personal representative authorities.
Official State & Federal Government Sources
HUD, VA, FEMA flood zone maps, and FHFA mortgage database feeds for assumability guidelines and loan limits.
Grounded Web Sources for Context Only
Strictly limited to broader macroeconomic news and inflation metrics. Never used for property-level prices or legal claims.
Mandatory Property Metadata Standard
Every property result surfaced through SemioTrace includes:
- Identified Primary Data Source & Provider Name
- Exact Timestamp of Last Verification
- Listing and Legal Docket Status
- 0–100 Data Confidence Score
- Explicit Disclosure of Known Unknowns (Data Gaps)
- Actionable Professional Verification Steps

