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One verification interface for every output One API. Separate evidence.

Encypher Verify reads the C2PAC2PA: The Coalition for Content Provenance and Authenticity: the group that publishes the open standard for content labels. label and any supported watermark in text, images, audio, video and documents such as PDF and Word. Each check gives its own result. Your team decides what to trust.

Verify an OutputRead the API

One vendor. One integration. Every output type. The basic check is free, with no account and no API keyAPI key: A secret string that identifies your account when your software calls an API. Keep it out of public code..

Four of the five answers a provenance check can give: Verified, Modified after signing, Issuer not recognized, and No provenance found. The fifth is Could not verify.
A check reports who signed and whether the content changed. It never says whether the content is true.
One API
Send text or a file through its matching APIAPI: Application programming interface: a way for one program to ask another to do a job, such as sign a file. endpoint. Each runs the checks that fit the content type.
Separate evidence
The signature, the watermark, a found record and your policy each get a result. Nothing hides in one score.
Any signer
It reads C2PA labels from any signer, not just ours.
Free to try
The public check needs no account. Try it now

Five checks, one answer

  1. Read the content type

    Pick the checks that fit: label, watermark and policy.

  2. Check the label

    Check the C2PA manifestC2PA manifest: The signed label itself: a small package inside a file that records who signed it, what they declared and how to check it.: who signed it, when, and its hard bindingHard binding: A hash of the content's signed bytes stored in the label, so a change to those bytes makes the check fail..

  3. Look for watermarks

    Run the supported watermarkWatermark: A mark placed in the content itself, visible or hidden, so it can be found again after the file is copied. checks for text, images, audio or video.

  4. Recover a stripped record

    Follow a soft binding back to the record when one applies.

  5. Return the evidence

    One reply keeps each signal, limit and policy reason apart.

What each result tells you

What each check can return
Possible resultsWhat it tells you
C2PA credentialValid, invalid or absentWho signed, and whether the content changed
Watermark signalDetected, not detected or unsupportedEvidence from that provider's method
Soft-binding recoveryFound, not found or does not applyWhether a linked record was found
Policy resultMeets, incomplete or fails policyA decision with named reasons

When the label was stripped

A file signed with a label and a watermark loses its label when a site strips metadata; a checker finds the watermark, which points back to the signed record, shown as recovered.
If a site strips the label, a supported watermark can lead back to the signed record. The result says it was recovered.

Platforms often remove metadataMetadata: Data stored beside the content in a file, such as author, camera or date. Many tools strip it when they copy or upload a file. on upload. A soft bindingSoft binding: A watermark or fingerprint that can find a content label again after the file was copied or its metadata stripped. can still lead back to the signed record: a watermark in the content points to where the record lives.

Recovery works when the applicable watermark and resolverResolver: A lookup service that takes an ID found in a watermark or fingerprint and returns the matching provenance record. are present. The result says so plainly when they are not.

Who uses it

Article 50 teams
Mark output, check it and keep the evidence for the EU AI ActEU AI Act: The European Union's law on artificial intelligence, which includes rules for marking AI-made content., Article 50Article 50: The EU AI Act rule that AI-made content be marked in a form software can read, and deepfakes disclosed.. Encypher supplies technical infrastructure and evidence. Your team and counsel retain responsibility for legal scope, disclosure, and governance.
Platforms
Put one intake check in front of content from many tools. Accept, reject or review each file under your own policy.
See the Article 50 workflow

For engineers

Show the technical detail
curl -X POST https://api.encypher.com/api/v1/public/verify \
  -H "Content-Type: application/json" \
  -d '{"text": "Paste signed text here."}'
Hard binding
A hash of the content inside the signed manifest. If one byte changes, the check fails.
Recovery limits
A generic watermark is not a C2PA soft binding. Recovery needs the identifier, a resolver, a reachable record and a supported path.
Reference
API reference and the verify API page.

Keep reading

Create. Mark. Endure.

Start with one output: mark it, check it, and keep the evidence.

Start freeVerify an Output