01
Device integrity
The capture chain is designed to include rooted and jailbroken device checks before a photo can become trusted evidence.
Technical verification chain
How Delphi turns a photo into evidence that can be trusted.
Delphi Verify secures the path from mobile capture to public certificate by checking the device, validating our official IOS app, detecting reproduced images, protecting time and GPS evidence, and anchoring the final record on blockchain.
Trust pipeline
A photo is only trusted after every layer agrees.
Delphi does not rely on a single signal. The system combines device integrity, app authenticity, capture provenance, image analysis, protected metadata, and immutable records into one verification flow.
02
Official app signal
Delphi Verify validates that the capture comes from our official IOS app, supported by Apple App Attest-backed app authenticity checks.
03
Live camera capture
Photos are captured inside the Delphi Verify IOS app instead of uploaded from a gallery, preserving the capture context at the moment evidence is created.
04
Photo-of-photo detection
The image is screened for signs that it may be a picture of a screen, paper print, or another reproduced surface.
05
Secure time and GPS
Capture timestamp and location signals are recorded as protected evidence fields, then bound to the photo record.
06
Blockchain finality
The verified evidence payload is fingerprinted and recorded on blockchain so later changes cannot silently replace the original record.
Evidence binding
The photo, time, place, and proof are sealed together.
A secure photo is more than image pixels. Delphi treats the capture as a bundle: the mobile context, Delphi Verify IOS app signal, reproduction checks, timestamp, GPS details, and certificate identifiers all move together into the final proof.
Before capture
The device and our official IOS app must pass trust gates before Delphi treats the photo as eligible evidence.
During capture
The photo, timestamp, GPS context, and certificate identifiers are bound into one evidence package.
After capture
A cryptographic fingerprint of the package is written to blockchain for independent comparison.
Independent verification
What a reviewer can trust in the certificate.
The public certificate enables third parties to verify the integrity of the evidence package by comparing its calculated fingerprint with the immutable fingerprint recorded on the blockchain. Any discrepancy indicates that the package does not correspond to the original recorded evidence.
The image was captured through the Delphi Verify IOS app, not imported after the fact.
The device and app authenticity signals match the expected capture policy.
The timestamp and GPS evidence are attached to the same photo record.
The photo passed reproduction checks for screens, paper, and other photo-of-photo risks.
The blockchain digest matches the current certificate evidence payload.
Legal defensibility
Talk to Delphi Built to stand up to scrutiny
Evidence is only useful if it can be trusted. Delphi Verify combines secure capture, chain-of-custody records, and independent verification to help organisations demonstrate when, where, and how evidence was collected.