"Audit Pack" sounds like a folder of PDFs. It isn't. It's a cryptographically sealed bundle that proves a set of records is complete and unaltered. Here's what's actually inside one, and why it can be built in minutes instead of a frantic week.
It starts with a single record
A field technician completes a task — say, sanitizing a cold room. The app captures the before/after photos, a temperature reading, and the technician's signature, each tagged with time and location. That collection is hashed: run through a one-way function that produces a short fingerprint. Change a single pixel later and the fingerprint changes completely. That's the foundation of tamper-evidence.
Records become a chain
Each sealed record's hash is anchored alongside the others. Rather than trusting that no one edited the database, anyone can recompute the hashes and compare. The structure — a Merkle tree — lets you prove a specific record belongs to a sealed set without exposing the rest of your ledger.
The pack is a proof, not a printout
When you build an Audit Pack, Tessera gathers every record in your chosen window and site, recomputes the Merkle root over them, and seals the pack with that root. The export contains the evidence and the means to verify it. An inspector — or your own QA team — can confirm that nothing was added, removed, or altered after sealing.
Why four minutes
Because the work was already done. The records were sealed as they happened, all shift, every shift. Building the pack isn't data entry; it's selection and verification. The median pack in our deployments assembles in around four minutes — most of which is the verification step running, not a human assembling anything.
What this changes
The week before an audit stops being a fire drill. The question shifts from "can we find the evidence?" to "which window do you need?" That's the difference between audit-rushed and audit-ready.
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