Proof / Records
A number, months later, still provably ours.
Every successful run returns a record: a SHA-256 digest over the canonical JSON of the model name, spec version, inputs, and outputs. Store it next to whatever you built on those numbers. This page recomputes the digest from a stored response and tells you — match or mismatch — whether the numbers are exactly what that spec version produced.
In plain terms
When a number from Worthune appears in a plan, a report, or an app, it travels with a fingerprint. The fingerprint covers four things: which calculation ran, which published version of the math it used, exactly what went in, and exactly what came out. Change any of them afterward — a hand edit, a rounding “cleanup,” a copy-paste error — and the fingerprint stops matching.
So if a number matters to you, you don’t have to take anyone’s word for it — not ours, not the software that showed it to you, not the person who sent it. Paste the record below and this page answers, match or mismatch, in seconds. Advisors use it to show a client where a number came from; compliance reviewers use it to confirm which version of the math was in force. No account, and nothing you paste is stored.
First time here? You don’t need a record of your own to see this work. The button below loads a real record — minted by the same engine that answers every API call — and checks it in front of you.
The check runs server-side against the same code that minted the record. Nothing is stored.
What a match proves
That these outputs are byte-for-byte what the named spec version produced for these inputs — nothing was edited, rounded, or swapped after the fact. The spec version pins the exact formulas; the changelog shows everything that has changed since.
What it doesn’t prove
That the inputs were right for the situation, or that the model fit the question — a record is provenance, not judgment. To re-check numbers against the engine as it runs today, use POST /api/v1/verify/{model} in the docs.
Prefer to check it yourself?
You don’t need us for this. Build {model, specVersion, inputs, outputs}, serialize as JSON with object keys sorted recursively and no whitespace, and SHA-256 it. Both SDKs ship this as verifyRecord(). Or over HTTP:
curl -X POST https://worthune.com/api/v1/records/verify \
-H 'Content-Type: application/json' \
-d '{"model": "...", "specVersion": "...", "inputs": {...},
"outputs": {...}, "sha256": "..."}'