The evidence
A verdict you can recompute.
The value of MORIS is not only that it judges. It is that its judgment holds up to someone who does not trust it. Because the judgment is a pure function of a structured input against a sealed reference, the same action produces the same verdict, sealed to the same record, every time. The sealed record is not an assertion about what MORIS decided; it re-derives to a byte-identical result. A licensed deployer runs that re-derivation over their own decision ledger without restriction, because they hold the asset.
Immutable is not re-derivable
This is the distinction the market keeps missing. Because generative AI is non-deterministic, audit and compliance tooling cannot reconstruct a decision from logs; it captures large proof bundles at decision time and stores them in tamper-evident storage. That produces an immutable record, and an immutable record is still contestable, because immutable means retrievable, not reproducible.
An immutable log says
This is what we stored, and no one changed it. It proves custody.
A re-derivable verdict says
This is the correct output of the law on these inputs, and it re-derives to a byte-identical result. It proves correctness.
Independent re-derivation
The record is sealed to the authored words the verdict was drawn from, and to the identity of the actor and the approver behind the action. A licensed deployer, holding the asset, re-runs the judgment over their own ledger and gets the byte-identical verdict and the identical root, without restriction. A party outside the deployment, an auditor engaged by a counterparty, a regulator, a plaintiff, re-derives under NDA or through a named third party whose attestation is published. That is what turns a verdict into evidence: it survives an adversary who assumes you are lying, because the re-derivation does not depend on trusting you.
What the regulation has been describing
Regulation is converging on exactly this. The EU AI Act’s traceability duties call for a record that lets a party reconstruct why an automated decision was made. A probabilistic system cannot produce that by construction: its output is a sample, not a derivation. A deterministic verdict, sealed to a record anyone can re-derive, is what the demand has been describing all along. The audit trail everyone is struggling to build is the exhaust of MORIS, not a product to be assembled.
What this is not
Re-derivability alone is not the differentiator. A permission engine is fixed and re-derivable too; it just checks whether an action was allowed, not whether it was right. What MORIS makes re-derivable is the verdict on what the action means, drawn from an authored posture rather than a hand-written rule. That is the narrow, exact thing: a content-and-intent-aware judgment that re-derives, under NDA or through a named third party. The mechanism that computes it is disclosed in full under NDA; that it re-derives is the part that survives a distrusting reader.