Three approaches. One proves you wrote it.

Process Evidence
vs. Watermarking vs. AI Detection

A watermark proves someone signed the text. An AI detector guesses what produced it. Only process evidence records how you wrote it, so the proof is yours and nobody else’s.

Feature-by-Feature Comparison

DimensionWritersLogicProcess EvidenceWatermarkinge.g., invisible text watermarksAI Detectione.g., perplexity classifiers
Provenance
What it provesThe fundamental question each approach answers"I wrote this": your own recorded writing processSomeone signed it (a claim of ownership)A statistical guess (probability score)
When evidence is createdAt what point in your writing the proof is madeDuring writingAfter writingAfter publication
Can AI-generated text pass?Whether someone can sign AI output and call it their ownNoYesPartial
Robustness
Survives paraphrasingWhether your proof stays intact when the text is rewordedYesNoN/A
Hard to fakeHow much work it takes for someone to defeat itLocked to your own device's hardwareInvisible characters, stripped in secondsDepends on the model (20%+ error rate)
Tamper-evidentWhether altering the evidence breaks the proofYesPartialNo
Legal & Standards
Weight when challengedHow much it counts when a client, an editor or a school pushes backA concrete record of how you wrote itA claim of ownership onlyAn opinion with a probability attached
Standards basisBuilt alongside recognized standards bodiesBuilt on IETF standards (COSE, CBOR, RATS) and C2PA; protocol published as individual IETF Internet-Drafts, plus six algorithms registered on the C2PA Soft Binding Algorithm ListC2PA Section A.7, no registered algorithmNone
Practical
Privacy preservingWhether your text stays private while the proof is madeYesYesNo
Works offlineProof can be made with no internet connectionYesNoNo
Open sourceLicense and availability of source codeAGPL 3.0 open core + commercial licensingAGPL 3.0 (viral copyleft)Proprietary
Records how you writeCaptures your editing rhythm, revision patterns and pause timingYesNoNo
Cost to sign and verify at scaleWhat it costs you to sign your work and have it checkedFree up to 10,000 a month; it runs on git, so the cap is abuse prevention, not costFree trial caps at 1,000 items/month, then $99+/moN/A

What actually protects you

Watermarking proves someone claimed the text. AI detection guesses what generated it. Neither records the act of writing itself.

We include invisible watermarking too, free, unmetered, no account required. It is a binding layer: cheap to run, which is why it is cheap to strip. We do not sell it as your only shield. Process evidence is the layer you reach for when a stripped watermark would cost you the client or the grade.

WritersProof records how you write: your rhythm, your pauses, how you revise and edit. That record is locked to your own device and sealed so that changing any part of it breaks the whole thing. Anyone can verify it for free.

Someone can strip a watermark with a few lines of code. To fake your process evidence, they would have to sit down and type every word of your document with a real person’s editing rhythm while defeating your device’s hardware security. That is a far harder problem, which is why the record holds.

Six ways your proof finds its way back to you

When your text is copied out of a file, reformatted, quoted in part or reworded, the signed record it came with is usually gone. A soft binding is what finds that record again. Text needs a family of them, because no single technique survives every edit. WritersLogic wrote and registered six with C2PA, more text soft bindings than any other organization on the list, and one record can carry several at once.

Every entry is public and independently checkable in the C2PA Soft Binding Algorithm List. The watermarking product compared above has no entry on it, and AI detectors have none. See how the six compose inside a single manifest.

Ready to prove you wrote it, not just say so?

See how WritersProof records your writing as you work, whether you are a freelancer, a student, a publisher or a school.