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

Send text, an image, audio, video or a document. You get one result that lists each check on its own, so your code decides what to trust.

Read the API referenceRun a free check

One vendor. One integration. Every output type.

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 contract
Text and files go to matching endpoints of one APIAPI: Application programming interface: a way for one program to ask another to do a job, such as sign a file.. Each runs the checks that fit.
Separate evidence
The label, a watermark and a recovered record each get their own status. Nothing is merged into one score.
Any signer
It reads C2PAC2PA: The Coalition for Content Provenance and Authenticity: the group that publishes the open standard for content labels. labels from any signer, not just ours.
Free to start
The basic public check is free. It needs 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..

What you get back

Each kind of evidence keeps its own status. A signature is proof. A watermark is a signal.

Each kind of evidence in the result
EvidenceStatusWhat the result keeps
C2PA credentialPresent, absent or invalidSigner, timestamp, claim and hard-binding evidence
Watermark signalDetected, not detected or unsupportedEvidence from that provider's method
Soft-binding recoveryResolved, unresolved or not applicableThe linked provenance record and resolver evidence

Policy decision: the free public check never returns one. On a signed-in advanced check, you can say how you plan to use the content. If it carries a publisher's rights policy, the result adds a permit or prohibit decision under that policy.

How a check runs

  1. Send the content

    Text goes to one endpoint and files to another. Both are free and need no key.

  2. Check the label

    The check reads 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. when one is there: who signed, 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. Read the result

    Each kind of evidence keeps its own status.

  4. Recover a lost label

    If the label is gone, make a second call. It looks for a supported watermarkWatermark: A mark placed in the content itself, visible or hidden, so it can be found again after the file is copied. and follows its soft bindingSoft binding: A watermark or fingerprint that can find a content label again after the file was copied or its metadata stripped. back to the record. This needs a resolverResolver: A lookup service that takes an ID found in a watermark or fingerprint and returns the matching provenance record..

One integration instead of five

A signed text mark gives a yes or no anyone can check, valid or changed; a statistical pattern runs through a model and gives a probability, such as 72 percent likely AI.
A cryptographic mark gives a checkable answer. A statistical pattern gives a probability.
  • You do not build separate intake, identity checks and audit for each model and each kind of media.
  • One contract checks the provenanceContent provenance: The record of where a piece of content came from and how it changed, carried with the content itself. of text, images, audio, video and documents such as PDF and Word.
  • Unlike signals stay unlike. A watermark guess never turns into a signed proof.

Where we stop and your team starts

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., we supply the marking, the checks and the evidence record. Your team and counsel decide which systems are in scope, what people must be told, and how to handle exceptions.

Not sure what is in scope? Run the readiness check.

Read the Article 50 guide

For engineers

Show the technical detailThe endpoints, the bindings and the limits of recovery.
curl -X POST https://api.encypher.com/api/v1/public/verify \
  -H "Content-Type: application/json" \
  -d '{"text": "Paste signed text here."}'
Validation
When a manifest is present, the check covers the credential, certificate chain, signer, timestamp, claims and content binding.
Recovery
Recover linked provenance through C2PA soft binding when the applicable watermark and resolver are present and embedded metadata is missing.
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

Keep reading

Create. Mark. Endure.

Start with one output. Send it, read the evidence, then use the same call across your products.

Start freeRead the API reference