Reference architecture
Trust Infrastructure Stack
How applications, intelligence services, PTI core contracts, and source data compose into portable trust infrastructure.
This page is an informative stack view. Normative requirements are in RFC-001 Architecture and Specification v1.0.
Diagram 1: Trust infrastructure stack
| Layer | Role |
|---|---|
| Applications | Decision workflows, underwriting, hiring, tenancy, merchant onboarding |
| Trust intelligence | Context scores, graph traversal, identity resolution, explainability |
| PTI layer | Normative events, contexts, exchange rules, consent and audit |
| Data sources | Raw activity from partners, registries, credentials, and verifications |
Diagram 2: Traditional vs PTI model
| Model | Characteristic |
|---|---|
| Traditional | Trust accumulates inside one institution; portability is manual and lossy |
| PTI | Trust profile persists across ecosystems with context isolation and provenance |
Component map
| Stack element | PTI document |
|---|---|
| Trust events | Trust events · RFC-003 |
| Trust contexts | Trust contexts · RFC-002 |
| Trust exchange | Trust exchange · RFC-006 |
| Trust graph | Trust graph · RFC-005 |
| Trust resolution | Trust resolution · RFC-011 |
| Lookup API | Trust APIs · RFC-004 |
| Governance | RFC-007 · Specification governance |
Trust flow (end-to-end)
See Trust flow for step-by-step detail.