Stage 5 — Chain of Title

Goal

Transform independently processed legal documents into a connected property history by building relationships, timelines, ownership chains and the current property state.

Output: Property Knowledge Graph.

Scope

This stage is responsible for:

• Timeline construction
• Entity resolution
• Relationship building
• Ownership chain generation
• Mortgage chain generation
• Property state computation
• Gap detection

This stage does not:

• Determine legal risk
• Decide insurability
• Generate title commitments

Input

• Enriched Documents
• Generic Fields
• Type-specific Fields
• Cross-document References
• Document Summaries

Processing Pipeline

Enriched Documents
        │
        ▼
Timeline Builder
        │
        ▼
Entity Resolution
        │
        ▼
Relationship Builder
        │
        ▼
Ownership & Mortgage Chains
        │
        ▼
Gap Detection
        │
        ▼
Current Property State
        │
        ▼
Property Knowledge Graph

Timeline Builder

Convert every document into a chronological property event.

Examples:

• Ownership transfer
• Mortgage creation
• Mortgage assignment
• Mortgage release
• Easement recording
• Judgment recording

Output:

• Ordered property timeline

Entity Resolution

Normalize entities appearing across documents.

Entity types:

• People
• Trusts
• LLCs
• Corporations
• Banks
• Government agencies
• Parcels
• Addresses

Responsibilities:

• Detect aliases
• Resolve spelling variations
• Merge duplicate entities
• Assign canonical identifiers

Relationship Builder

Create relationships between all extracted entities.

Examples:

• Property OWNED_BY Person
• Mortgage ENCUMBERS Property
• Release RELEASES Mortgage
• Assignment TRANSFERS Mortgage
• Easement AFFECTS Property

Ownership Chain

Construct a complete ownership history.

Responsibilities:

• Explain every ownership transfer
• Maintain chronological order
• Detect missing ownership events

Output:

• Complete Chain of Title

Mortgage Chain

Track the complete lifecycle of every mortgage.

Responsibilities:

• Original mortgage
• Assignments
• Modifications
• Releases
• Current holder

Current Property State

Compute the latest known state.

Examples:

• Current Owner
• Current Mortgage Holder
• Active Mortgages
• Released Mortgages
• Easements
• Restrictions
• Outstanding References

Gap Detection

Automatically detect potential issues.

Examples:

• Missing deed
• Missing mortgage release
• Ownership gap
• Invalid chronology
• Duplicate transfers
• Orphan references
• Unknown entities

Detection only. No legal reasoning occurs here.

Knowledge Graph

Represent all entities and relationships in Neo4j.

Core node examples:

• Property
• Person
• Organization
• Trust
• Mortgage
• Deed
• Easement
• Judgment

Core relationships:

• OWNED_BY
• TRANSFERRED_TO
• ENCUMBERED_BY
• RELEASED_BY
• REFERENCES
• ASSIGNED_TO
• AFFECTS

Structured Output

• Timeline
• Ownership Chain
• Mortgage Chain
• Entity Graph
• Property Graph
• Current Property State
• Gap Report
• Relationship Metadata

Edge Cases

• Duplicate owners
• Name variations
• Trust ownership
• LLC ownership
• Multiple parcels
• Parcel splits
• Parcel merges
• Missing intermediate documents
• Circular references
• Conflicting recording dates

Human Involvement

Minimal.

Humans review detected gaps in later stages rather than manually building relationships.

Expected automation: 85–95%.

Definition of Done

• Complete timeline generated.
• Ownership chain established.
• Mortgage chain established.
• Entities resolved.
• Relationships created.
• Knowledge graph persisted.
• Current property state computed.
• Gap report generated.
• Ready for Stage 6 (Lien & Encumbrance Analysis).