About Lens Proof
Lens Proof is a professional proof-of-work camera app for iPhone designed to make field evidence tamper-proof. Built to close the trust gap in infrastructure, audit, and site inspection, Lens turns camera output into cryptographically verifiable records that prove where, when, and how media was captured.
The Infrastructure Trust Mission
Developed in the Philippines under the StartupPH ecosystem by Fieldnotes, Lens Proof was created to address a critical real-world problem: public infrastructure fraud and unverified field reports.
When ghost projects or altered inspection photos go undetected, public funds and safety are compromised. A signed, timestamped, geotagged photo makes fraud nearly impossible to hide. By combining Apple Secure Enclave hardware signing, C2PA v2.4 Content Credentials under Conformance Program v0.2, and RFC 3161 trusted timestamps, Lens anchors physical field work to cryptographic truth.
Core Evidence Pillars
Evidence Overlays
Permanently embed date, time, precise GPS coordinates, altitude, live weather, and project notes directly onto photo and video frames.
C2PA Provenance
Hardware-bound Apple Secure Enclave signing and RFC 3161 trusted timestamps turn media into cryptographically verifiable C2PA v2.4 Content Credentials. Lens Proof is publicly conformant at Max Assurance Level 1; production CA trust remains separate.
AI Inspection Reports
Instantly convert photo batches into structured PDF, CSV, or JSON site inspection reports with automated executive summaries and photo captions.
Local-First Privacy
Zero data retention. Your photos, videos, and GPS coordinates remain strictly on your device or in your personal iCloud storage.
Try Lens Proof on your next site visit
Available on iOS with a 14-day free trial of Lens Pro.
Get Lens Proof on App Store