Prevent problems before they spread
Small gaps in field records can grow into costly disputes. Capture signed, timestamped, geotagged evidence while the work is happening, so teams can act before questions spread.
Overview and mission
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.
Summary
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 by Fieldnotes to address public infrastructure fraud and unverified field reports.
Hardware-bound truth
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
Architectural pillars turn ordinary iPhone photos and videos into verifiable audit evidence.
Data overlays
Real-time capture data appears directly on photos and videos: date, time, GPS coordinates, address, compass heading, optional weather, and site notes.
Content Credentials
When enabled, Lens embeds a tamper-evident C2PA manifest in photos and videos. Apple Secure Enclave signing and trusted timestamps when online support cryptographically verifiable origin and integrity.
PDF reports
Turn selected gallery captures into structured PDFs with photos and metadata. Lens Pro, Lens Trust, or an active trial with AI reports remaining can add AI captions and an executive summary.
Local-first privacy
Most processing stays on your device. Signed Master Copies are saved to your personal iCloud Drive by default, not on Lens servers.
Cryptographic conformance stack
Lens Proof is built on open industry standards for digital provenance and cryptographic attestation.
C2PA Technical Spec v2.4
Lens is C2PA conformant at Max Assurance Level 1 under Conformance Program v0.2 / C2PA Specification v2.4.
Max Assurance Level 1
Lens generates a non-exportable, device-unique signing key inside Apple Secure Enclave hardware.
RFC 3161 Timestamping
When online, Lens requests an external TSA timestamp to establish trusted capture time.
Philippine-incorporated company
Lens is developed by Fieldnotes dot Dev Opc, a Philippine-incorporated One Person Corporation.
Lens Proof is publicly listed as Lens Proof-of-Work on the C2PA Conforming Products List.
Get started
Deploy Lens Proof for your field inspection teams or audit workflows.
Get Lens Proof on App Store
Download Lens Proof on iOS with a 14-day free trial of Lens Pro.
Download on App StorePricing and plans
Review Lens Core one-time purchase, Pro trial, and Trust tiers.
View pricingContent Credentials
Learn how hardware signing and C2PA manifests protect media integrity.
Explore credentials