Camera Credentials Are Not Chain of Custody
A contractor documents a property condition before a job starts. Forty photos on a smartphone. The device signs each image at the hardware level: device ID, GPS coordinates, capture timestamp, edits applied. Solid provenance metadata from the point of capture.
They submit the claim six weeks later. The photos have been through a project management upload, a carrier portal ingest, a file compression, and two email attachments. The C2PA credentials are gone by the second handoff.
The photos exist. The authentication doesn't.
What C2PA Actually Proves
C2PA (Content Credentials) is an industry standard backed by Adobe, Google, Meta, Microsoft, and OpenAI. It embeds cryptographically signed provenance metadata directly into files at capture. Modern smartphones can sign images at the hardware level. An AI-generated fake can't produce a valid signature from a real device's hardware key.
For fraud detection, this matters. For establishing a chain of custody through claims workflows, the limitation is structural: the credential lives inside the file.
Upcoming EU regulations will mandate machine-readable content marking for AI-generated material. C2PA is the standard the industry chose for compliance. Hardware adoption is growing. But regulations that mandate content be marked say nothing about whether that mark survives normal file handling.
What Happens Between Capture and Carrier
File transfers strip metadata. Platform uploads compress images. Email attachments get processed through security filters. Project management systems ingest files into proprietary formats. Each step in a normal claims workflow can remove the C2PA credential.
The contractor followed every best practice. They used compliant hardware. They captured authenticated metadata. They documented everything before the loss occurred. But by the time the dispute reaches court, the provenance data is gone.
You have photos. You don't have proof.
Independent Verification
A blockchain anchor exists outside the file. It can't be stripped during transfer, corrupted during upload, or lost during format conversion. The anchor lives on an immutable public ledger regardless of what happens to the file afterward.
The strongest chain of custody uses both layers:
C2PA proves what device captured the image, when, and what edits were applied. The blockchain anchor proves the file existed at a specific timestamp, independently verifiable years later.
When you're handling a disputed claim worth hundreds of thousands of dollars, that independence matters. The photos tell the story. The blockchain timestamp proves when the story was written.
I built ProofLedger because having evidence isn't the same as proving when you had it. Courts need verification that works in real claims workflows, not just in controlled lab conditions.
Hardware authentication is powerful at the point of capture. Blockchain anchoring is powerful at the point of dispute. Use both.