SHA-256, hash chain, signatures (customer and person handing over), QR check.
A record that can no longer be altered.
In one sentence: like a wax seal on a letter — once closed, any later opening is immediately visible.
When a record is completed, Comcentra Logs calculates a single digital fingerprint (a “hash”) from the entire content — every photo, every odometer reading, every damage marking, every signature. That fingerprint works like a wax seal on a letter: as long as it is intact, it proves that no one has opened and altered the content. Each new record is also chained to the previous one — an unbroken chain per vehicle.
An ordinary PDF or photo can be edited afterwards on a computer — change a date, retouch a scratch away. With a sealed record that is impossible: the smallest change produces a completely different fingerprint, and the seal breaks visibly.
In a dispute over damage it is no longer one person's word against another's. The documented condition cannot be argued away — which saves expensive discussions and protects against unjustified claims.
Photos that are provably taken here and now.
In one sentence: like a photo with the place and time stamped firmly onto it, sealed and put straight into the safe.
Photos are taken exclusively live with the camera in the app — uploading from the gallery is not possible. At the moment of capture, place (GPS), time and device are firmly linked to the image and sealed with it. Every image is therefore inseparably bound to that moment and that vehicle.
The biggest weak point of any photo-based handover system: “Is the photo genuine at all — or an old one, someone else's, an edited one?” Certified Capture closes that gap at the source.
No substituted or manipulated photo. What appears in the record was demonstrably taken at exactly that place, at that time, with that device.
Authenticity anyone can recompute for themselves — even without us.
In one sentence: like an entry in a public land register — except that here the Bitcoin blockchain makes sure no one can change it again.
You might ask: “And what if Comcentra Logs itself changes something?” That is exactly what this module rules out. At regular intervals all seals are combined into a single check value and entered into a public register. That check value is additionally anchored in the Bitcoin blockchain — the best-known immutable public register in the world. Once something is in Bitcoin, no one can change or backdate it — not even us.
Other providers say “trust us, the document is genuine”. That is often not enough when it is challenged. With Comcentra Logs, authenticity is proven mathematically and can be verified independently of us.
Even if Comcentra Logs no longer existed one day, every record would remain verifiable. We cannot change anything unnoticed either — the strongest argument for trust with customers, insurers and anyone who has to assess the evidence.
One scan of the QR code — and anyone can check for themselves.
Every record PDF carries a QR code. Scanning it opens the verification portal — and your own device confirms within seconds that the record is genuine and unchanged. Every record carries a QR code: one scan opens the verification portal, and the checker's device recomputes in the browser that this very record is contained in it.