Glossary

LockProof glossary: the terms behind a field work record

By the LockProof Team · Last updated November 5, 2026

Here are the 29 terms you will see on the pages of LockProof, field work verification software for recurring visits, each in plain words. For product terms, the entry says what LockProof records. If a word could overstate what a record proves, the entry spells out its limits.

Common questions

What is field work verification software?

Software that sends field workers a photo request at set or random times and files each answer as a dated record. In LockProof the worker answers a link through the live camera, the server stamps the arrival time, a SHA-256 fingerprint seals the record, and coordinates are kept only if the worker shares them.

What does tamper-evident mean on a LockProof record?

It means a later change to the record is detectable, because the fingerprint over the image and the server-set time would no longer match. It does not mean a change is impossible, and it says nothing about what was in front of the camera.

Is LockProof an EVV system?

No. LockProof is not an EVV system and its records do not reach a state aggregator. Some home care agencies keep its photo records beside the EVV system they already run.

The terms, in the order a record is made

Field work verification

Keeping a record that a scheduled job or visit was answered with a photo, and when. LockProof is field work verification software: the worker answers a link with a live photo, and the record carries a server-set time and a fingerprint.

Software to prove field work was done
Proof of service

A record that a service visit or job was answered: a photo, the time it was received, and often a location. The words promise a record of what was captured and when. They do not promise the work was done well, and they do not decide a dispute.

Proof of service for commercial cleaning
Proof of service software

Software that collects that record for recurring visits and keeps it on file. It is another name for field work verification software, and the name some buyers and answer engines use for it.

What is proof of service software?
Live camera, gallery blocked

The worker’s link opens the phone’s camera and takes the photo from the live view. Gallery uploads are blocked, so an old photo can’t be attached.

Proving a work photo is authentic
No-app link

The worker taps a link in a text, WhatsApp message or email and the page opens in the phone’s browser. There is no app to install and no account to create; the link itself is what is checked.

No-app worker check-in software
Server-set time

The time LockProof’s server records when the photo arrives, recorded on submission. It is the server’s clock, not the phone’s, and on-time and late are worked out from it. A check with no photo once its window closes is missed.

Is a timestamp photo enough proof?
Phone timestamp

The time a phone or a camera app writes on or into a photo. LockProof keeps the phone’s time as information only; the time that counts is the server’s.

Timestamp camera apps and a sealed record
Location when shared

The phone asks for location when the worker submits. Coordinates are saved only if the worker shares them, so a record can have no location. A company can require a location reading before a worker can submit.

Verify field work without tracking employees
Site proximity flag

An optional, advisory flag on the office dashboard when a photo comes in from beyond a distance you set from the site. It works only for sites with coordinates set, never blocks or rejects a submission, and is switched on per account.

An alternative to employee GPS tracking
SHA-256 fingerprint

A fingerprint computed over the image and the server-set time, plus the coordinates when the worker shares location, so a later change to the record is detectable. It shows the record is unchanged since it was sealed; it does not show what was in front of the camera.

What a photo verification code checks
Tamper-evident

A record where a later change shows. Tamper-evident is not tamper-proof: nothing stops someone trying, but the fingerprint no longer matches if the record is altered.

Proving a work photo is authentic
Chain of custody

In LockProof’s pages, the account of how a photo went from the camera to the file: a live capture, a server-set time on arrival, a fingerprint, and the record kept on file with no delete action for customers. It describes how the record was made and kept. It is not a legal certification and does not promise how any reviewer will weigh it.

Documenting maintenance work for an insurance claim
Dispute-ready

Records already organized to answer what a client, an owner or an adjuster asks first: what was captured, when it arrived and whether it changed since. It describes the record, not the outcome of a dispute.

Dispute-ready vendor records
Audit-ready

Records you can pull by site and date range without rebuilding them from texts and email threads, with the rate’s formula printed on the report.

Vendor documentation checklist
Evidence-grade

Our word for a record that carries how the photo was captured, when the server received it and a fingerprint showing whether it changed. It describes what the record holds, not a ruling by anyone who reads it.

Answering a chargeback with photo evidence
Random schedule

Each send time is picked at random inside the business hours you set for the assignment. Fixed times are a separate, optional schedule.

Fake patrol logs and what a live photo shows
Response window

The time a worker has to answer a check after it is sent. Whether a photo counts as compliant or late is worked out from the server-set time against when the check went out and the window you set; a check with no photo once its window closes is missed.

Verify a vendor showed up
Miss alert

When a scheduled check passes its window with no photo, the manager on record gets an email. It is on unless the company turns it off.

Proving cleaning was completed
Compliance rate

On the dashboard, compliant visits out of every check that was sent, misses included. Excused checks and self-logs are left out.

Vendor accountability software
Compliance report

A printable page per worker that shows the rate, the status counts and the formula behind the rate, and lists self-logged photos as not counted.

Vendor accountability software
Visit Mode

A check-in photo and a check-out photo, each a live capture with its own server-set time, and the time between them. It is switched on per assignment, inside the Visit Mode feature, which is on by default only for home care and home health.

Prove a caregiver visit happened
Self-log

A permanent link a worker uses to send a photo nobody asked for, the same live-photo flow as a scheduled check. Self-logs are marked as worker-initiated and are not counted in the compliance rate. It is switched on per account and per worker.

A customer says nobody came
One-off task

A single job the office sends by link to one of its workers or to an outside contact, answered with the same live photo. An outside contact needs consent on file. It is switched on per account, and off by default.

Proof the job was completed
Evidence Vault

The office page that pulls the records for one site or all sites over a date range into a dossier you can print, save as a PDF or export as a CSV.

Dispute-ready vendor records
Evidence packet

A link to a site’s records over a date range, made from the Evidence Vault, that someone outside opens with no account. It expires after 30 days and the office can revoke it sooner.

Answering a chargeback with photo evidence
Client portal

A link a client opens with no account that shows only that client’s sites over the last 30 days. It is switched on per account.

Prove work to owners
AI photo review

On scheduled photo requests, an optional pass that marks the photo as plausible, unclear or suspicious. It runs only when LockProof’s AI service is set up, your plan includes AI review and the setting is switched on for your account. It is an advisory flag for the office, never a verdict, and it never changes a status or blocks a submission.

Proving a work photo is authentic
EVV (electronic visit verification)

The system that state Medicaid programs use to confirm in-home personal care and home health visits, under a federal requirement. LockProof is not an EVV system; some agencies keep its photo records beside the one they run.

EVV requirements by state

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