EVIDENCE & GOVERNANCE

Evidence Chain

Every displayed TRUST outcome is assembled from a traceable sequence of implementation stages. This page shows where each result originates and how it contributes to the final recommendation.

Core principle

A recommendation is not treated as a standalone AI output. It must remain reconstructable from upstream evidence, model output, explanation evidence and policy interpretation.

Traceable Assessment Chain

Stage 06Feature & Context Engine

Stage 07AI Trust Engine

Stage 08Explainability Engine

Stage 09Policy Engine

Stage 06 — Feature & Context

Transforms normalized transaction context into structured evidence such as velocity, device relationship, corridor familiarity, relationship maturity, authentication assurance and metadata completeness.

Evidence source

Stage 07 — AI Trust Assessment

Consumes Stage 06 evidence and produces the trust score, risk probability, risk category and confidence score.

Model output

Stage 08 — Explainability

Converts only model-applied evidence into reason codes, feature contributions and a human-readable explanation. Unsupported reasons must not be invented after scoring.

Explanation evidence

Stage 09 — Policy

Interprets the trust, risk and confidence assessment through explicit versioned policy rules to generate an advisory recommendation.

Advisory only

What the Evaluator Can Verify

Question	Evidence expected
Why did the model assign this risk level?	Stage 06 context plus Stage 07 applied model features.
Why is this reason shown?	Stage 08 reason code corresponding to an actual model-applied feature.
Why was this recommendation made?	Stage 09 policy rule plus model risk/confidence output.
Can the result be reconstructed?	Yes. Transaction ID, model version, policy version, reasons and audit evidence remain linked.

Institutional decision boundary: the evidence chain explains and supports an advisory recommendation. It does not transfer final transaction authority away from the participating institution.

Evidence Chain Provenance

This visual presents the staged provenance of the evaluator-facing evidence chain.

The evidence page becomes more persuasive when the staged provenance is shown graphically.