Trust

Evidence you can check yourself.

Find the product listing, verification keys, report vocabulary and technical scope in one place.

C2PA status and scope · Verification keys · Result vocabulary · Sample result · Limits · Product status

Technical findings may establish

  • Supplied bytes match a cryptographic commitment.
  • A signature verifies under stated trust material.
  • Supplied evidence records correlate.
  • A package differs from its committed form.

They do not establish

  • Truth or authenticity of a depicted event.
  • Identity, ownership, authorization, or intent.
  • Completeness of all possible evidence.
  • Legal, regulatory, or scientific conclusions.
Authoritative C2PA scope

Recorded status

ChaosMark is a C2PA Conformant Validator Product. ChaosMark’s C2PA Conformant Validator Product is listed under record 01a06d52-857e-72da-9ef7-709193669393. Use hosted validation to check seven media formats and download a report that identifies its validator build. Every report identifies the exact build that produced its findings.

recorded product scope
listed product identityChaosMark / SapienCX
conformance record01a06d52-857e-72da-9ef7-709193669393
specificationC2PA Specification 2.2
conformance programConformance Program 0.2
validate scopeJPEG, PNG, WebP, MP4, MP3, WAV, M4A
generate scopeGenerate scope: none
live videoLive Video: not included
hosted validation buildA bug-fix successor build derived from the listed product. The successor build is not itself currently listed.

This is not a Generator Product claim, certification, approval, endorsement, legal or regulatory compliance claim, or a claim about truth, authenticity, ownership, authorization, or capabilities outside the record. Read the C2PA scope explanation.

Verification keys

Published public keys

ChaosMark records are signed with Ed25519 keys. The public halves are published at fixed addresses so a signature can be checked against them without relying on this website's interface.

Every published key

Key identifiers, algorithm, public key material, and each key's status and dates, as JSON.

/.well-known/chaosmark-keys.json

The current signing key

The public key this service signs with now, as a PEM file. Use the key list above to check a record signed before a key rotation.

/.well-known/chaosmark-public-key.pem

These addresses serve public key material only. A signature that verifies shows that a record was signed with the published key; it does not establish who made the content, who owns it, or that it is truthful. No separate Offline Verifier package is offered.

Result vocabulary

What Verify reports, and in how many parts.

Free Verify runs two active checks — a Content Credentials (C2PA) presence check and a ChaosMark record check — and answers each separately, never adding them into one verdict. Each answer uses a fixed set of states. Similar-file (likeness) checking is an additional capability that is not currently enabled on public Verify.

content credentials (C2PA) — what the file carries
None detectedNo C2PA Content Credentials were detected in the file.
Present — not evaluatedContent Credentials are present. Free Verify detects them; full validation is a separate, paid hosted evaluation.
Not checkedThe file was not examined for Content Credentials, or only part of it was: files over 2 MiB are read at the start and the end, and finding nothing there is not reported as none detected.
chaosmark evidence — does it match a signed record
Exact matchThe bytes match the signed commitment and the record's signature verifies under the published key.
No matchThe record's signature verifies, but the checks that could be run did not match this file.
Nothing foundNo record for this file was found. That does not mean the file is fake; most files were never registered.
Invalid proofThe supplied record was changed, or was never a ChaosMark record.
Unsupported proofThe supplied record comes from a version this door does not handle.
Insufficient evidenceNot enough could be read from the file, or the result could not be mapped to a finding. Nothing is treated as a failure.
Not checkedThis part of the check did not run; it is not a result about the file.
additional capability, not enabled on public verify — similar files
Looks similar — not exactA research-grade lead that can be wrong. It is never an exact match.
Not checkedSimilarity recognition is switched off on this service, so no look was made.
Sample result

A labelled sample, not a real check.

Illustrative sample.

This shows the shape of a Verify result. It was not produced from a real file or record, and nothing on this page checks anything.

Present — not evaluated

Content Credentials (C2PA)

This file carries Content Credentials.

Established: a C2PA manifest store is present in this file.
Not established: whether those credentials are valid, who signed them, or whether they describe the file truthfully.

Exact match

ChaosMark evidence

This file exactly matches the file covered by the supplied record.

Established: the bytes match the signed commitment, and the record's signature verifies under the published key.
Not established: that the recorded scene was truthful, or who made the file or owns it by law.

Not checked

Similar files

Similarity recognition is switched off on this service.

Established: nothing about resemblance.
Not established: whether similar files exist.

Verify a file

Public product status

Free · no account

Verify

Inspect supported supplied evidence and receive bounded findings.

Open Verify

Demonstration only

Create

The public walkthrough does not issue, sign, upload, or store evidence.

Open the demonstration

Windows 11

Local and offline

ChaosMark Local Agent 0.2.2 is available for Windows 11 x64. Its checksum and signer are on the download page. It is not offered for macOS or Linux.

See the Windows package

Enterprise evaluation

Agent Evidence

Delivered as a scoped evaluation. It is not available through the hosted browser or API.

Agent Evidence

What you can use today

Free · no account

Check a file

Check a JPG or PNG up to 1 MB online, free and with no account. Content Credentials (C2PA) are reported as present — not evaluated, none detected, or not checked. The file is checked against records issued by the ChaosMark online service.

Verify a file free

Windows 11 x64

Protect files locally

Create ChaosMark evidence for a file, and verify it later, with the Windows Local Agent.

Download for Windows

What needs a conversation

Workflow integration, private deployment, and high-consequence evidence use cases are scoped with you in a technical evaluation.

Email for a technical evaluationView pricing