verifyProof

Verifies the cryptographic zero-knowledge proof embedded in the C2PA manifest. Checks the validity and integrity of the ZK proof.

Usage

import { VerifiableFile } from "@succinctlabs/zcam1-verify";
 
const verifiable = new VerifiableFile(file);
const appId = "TEAM_ID.com.example.app";
 
const result = await verifiable.verifyProof(appId);

Parameters

appId (required)

Type: string

The app identifier used during initCapture().

iOS: TEAM_ID.BUNDLE_ID (e.g., 'NLS5R4YCGX.com.example.myapp')
Android: The app package name (e.g., 'com.example.myapp')

Returns

ResultAsync<boolean, Error> - true if the proof is valid, false otherwise.

Example

import { VerifiableFile } from "@succinctlabs/zcam1-verify";
 
const input = document.querySelector<HTMLInputElement>("#file-input")!;
 
input.addEventListener("change", async () => {
  const file = input.files?.[0];
  if (!file) return;
 
  const verifiable = new VerifiableFile(file);
  const appId = "TEAM_ID.com.example.app";
  const result = await verifiable.verifyProof(appId);
 
  if (result.isOk() && result.value) {
    console.log("Zero-knowledge proof verified!");
  } else {
    console.log("Proof verification failed");
  }
});

Notes

Requires the file to have been proven using the Prove SDK
The appId parameter must match the value used during initCapture()
Verifies the Groth16 proof using the embedded verification key hash
Public inputs include the file hash, app ID, and Apple root certificate