The proof loop
How do you know the work actually happened?
LockProof turns one text and one live photo into a record that holds up when someone asks.
How it works
The 60-second proof loop
Here is how one visit becomes a record you can stand behind. The same loop runs on every job, in about a minute — no chasing, no paperwork after the fact.
- 7:00 PM
The text arrives
Your super's phone buzzes at the scheduled time. No app to install, no login to remember — just a text with one link. They tap it on the way to the door, and the only thing waiting is a camera.
- 7:12 PM
The camera opens
The link opens straight to the camera. The worker taps Start Camera. No camera roll, no gallery, no way to attach a shot from yesterday — the photo has to be taken right now, on site.
The worker screen: the reminder link opens a live-camera capture — Start Camera, no gallery, no upload. - 7:14 PM
The record seals itself
The moment the photo is taken, LockProof attaches GPS, a server timestamp the worker can't set, and a SHA-256 chain of custody. Nothing gets typed in later. The record seals itself and files where you can find it.
- 7:14 PM
You see it live
It lands on your dashboard as it happens — verified, late, or missed, building by building. Nothing to chase. And when a client or an insurer questions the work months later, the record is already filed, dispute-ready.
Your dashboard: verified, missed, and late visits at a glance, with at-risk buildings flagged.
Want to see what one finished record looks like?
See a sealed recordGuides
Go deeper on proving field work
How do you prove a vendor showed up?
4 min readSend the vendor a text link at the scheduled time. It opens a live camera — no gallery — and attaches GPS and a server timestamp the moment the photo is taken. Each visit lands on your dashboard as a searchable, location-checked record.
Read the guide →How do you prove each assigned task got done?
3 min readEach job is tracked on its own, not lumped into one “they were on site” check-in. Assign a task, the worker completes it with a live photo, and that task gets its own GPS- and time-stamped record — with messages kept in a separate thread.
Read the guide →What makes a vendor record dispute-ready?
4 min readA dispute-ready record stands on its own: a live photo of the work, GPS, a server timestamp, and a chain of custody showing it hasn't been altered. It's searchable by site and date, and shareable as a tamper-evident link.
Read the guide →FAQ
Straight answers
Do workers need to install an app?
No. The worker gets a text with one link and taps it. The camera opens, they take the photo, and it submits. Nothing to download, no login, no training — it works the same on any phone.
Can someone submit an old photo?
No. The link opens the live camera directly and blocks gallery uploads, so a worker cannot attach a shot from the camera roll. Reminder timing is randomized, and every capture is sealed with GPS, a server timestamp, and a SHA-256 fingerprint.
Is the chat part of the evidence?
No. Each task has a Task Thread where the office and worker trade notes and questions. It sits alongside the record for communication only — messages are never mixed into the tamper-evident record itself.
See it on your own sites
Book a demo and we’ll run the proof loop on your buildings, your crews.