Why the report alone does not prove the visit
The instrument does its job: a thermal camera makes the thermal image, a gauge gives a reading. But that output only proves a measurement exists somewhere. It does not prove someone stood on that site, on that date, and did the round.
A supporting photo is meant to fill that gap, yet on its own it is weak: it can be reused, backdated or edited, and its metadata is trivial to change. So the proof of presence, the part that stops a ghost inspection, is exactly the part that is missing.
What actually proves a visit took place
Presence has to be captured live on site and bound to a time and a place, so a third party can confirm it later without being there. It is the same idea as any solid proof of work: created at capture, tied to the file, tamper-evident.
Concretely: the moment, the location, and a fingerprint of the image that breaks if the file is touched. Add those and a photo stops being a claim and becomes a check anyone can run.
How Danaya seals the visit, not the measurement
The inspector opens a capture link on their phone, with no app and no account, and photographs the equipment live at the point of inspection. Import is off, so a picture from another site or another day cannot be used.
Each shot is sealed at capture: a SHA-256 fingerprint of the file, the GPS location and a server timestamp the sender cannot set by hand, all signed, verifiable by anyone from a public link. Danaya does not produce or replace the thermal reading or the report; it adds proof that the inspection physically happened on site. It is a complement, never an official certification.