Human Authenticity Certificate
HAC
A Human Authenticity Certificate (HAC) is a cryptographically signed, tamper-proof record that proves a specific document was written by a real human — in a real session, on a specific date — without revealing a single word of the work itself.
HACs are issued by Scripli after observing a writing session in real time. They are permanently bound to that session and cannot be forged, transferred, or altered. Anyone can verify a HAC publicly — no account required.
A HAC is not an AI detector result
AI detectors analyse the output of writing — the text itself — and produce probabilistic scores. They can produce false positives on human writing and false negatives on AI-generated text. Their results are not proof of anything.
A HAC proves the process — the act of writing. It does not analyse the resulting text at all. A document with a HAC has verifiable human provenance regardless of what any detector says, because the certificate was issued during the session, not after.
What a HAC contains
Every certificate includes these fields. None contain document text.
Certificate ID
A unique, permanent identifier for this specific certificate.
Session metadata
Start time, end time, duration, and character count of the writing session.
Behavioural metrics
Writing rhythm signals, revision patterns, and a Provenance Score reflecting cognitive effort.
Cryptographic hash
A tamper-evident fingerprint of the session data. Any alteration invalidates the certificate.
Blockchain anchor
An independent, public timestamp proving when the certificate was issued — verifiable without Scripli.
Digital signature
Scripli's certificate authority signature confirming the record is genuine and unaltered.
What is never stored
Scripli observes the writing process without reading what you write. None of the following ever leave your device or reach Scripli's servers:
- ✕The text of your document
- ✕Individual keystrokes or characters
- ✕Screen recordings or screenshots
- ✕Clipboard contents
- ✕Browser history
- ✕Biometric data
How to get a Human Authenticity Certificate
- 01
Install the Scripli Chrome extension
Works alongside Google Docs, Word Online, Canvas, and any web-based editor. One click to install — no account required.
- 02
Write normally
Open your document and write as you normally would. Scripli runs silently in the background. Your content never leaves your device.
- 03
End your session
When you finish, end the session. Your writing signals are sealed into a tamper-proof, cryptographically signed record.
- 04
Receive your certificate
A HAC is issued with a unique ID. Share the verify link — anyone can confirm validity, no account needed.
How to verify a HAC
Visit scripli.com/verify/{certificate-id} and enter the certificate ID. No account required. The verification page shows:
- Certificate status (valid, revoked, or not found)
- Session metadata (date, duration, word count)
- Provenance Score and behavioural summary
- Blockchain anchor hash for independent verification
Generate your first HAC
Free to start. No document content stored. Your certificate is yours — permanently.