PROVENANCE
It came from that AI provider.
EXALTO NOTARY PROTOCOL · RECORDING
Days of conversations.
One record to show for them.
Every prompt and reply, captured on your machine as it happens, then reveal exactly the lines you choose. Anyone can verify.
VERIFICATION TOOLS FOR YOUR AI INTERACTIONS
YOU · TRACKED LOCALLY
MODEL · VERIFIED & SEALED
FADED · SEALED, UNDISCLOSED
PROOF OF THOUGHT · THE FIRST APP ON TOP OF THE EXALTO NOTARY PROTOCOL
Show the delta, not just the draft.
A text editor that knows which words came from the model and which came from you: every exchange sealed as it happened, every contribution tracked locally.
Request early access
early access · coming soon
See a ledger entry →
Answering the timing objection · Draft 5
SEALED ✓
Answering the timing objection
The detector said a machine wrote this. The ledger says something more precise: a first draft arrived at 11:42, then forty minutes of my own revisions; a counter-argument I asked for, CONTRIBUTION HISTORY · ¶1 11:42 · model draft · 34 words 12:22 · you rewrote 21 of them ✓12:24 · revision sealed view full trace →
The strongest objection is timing: certification proves the exchange happened, not the intent behind it. I answer it with process: six weeks of it, sealed as it ran
EXALTO NOTARY PROTOCOL (ENP) · OPEN SOURCE
The open protocol for provable AI interactions.
For the first time, you can prove a conversation with an AI happened exactly as you say it did, and prove it to anyone, forever. Not a screenshot. Not an export. Real proof.
YOU
Your machine
the session, recorded as it runs · one portable file: email it · submit it · file it
● your content stays here
01 ⇅ your session · encrypted end to end
03 ↑ a receipt returns · signed & timestamped
THE NOTARY
Exalto Seal or compatible
countersigns + timestamps
never sees plaintext
02 ⇅ relayed on, witnessed as ciphertext
THE AI PROVIDER
Anthropic, OpenAI, etc.
no cooperation required · TLS ✓
04 ↓ the trace, from your machine · only when you choose
ANYONE
Client, court, professor...
open tools · offline · free · no account
The session already happens. Everything in blue is what the protocol adds: the witness in its path, the receipt, the portable, verified trace.
A VERIFICATION BREAKTHROUGH
A transcript is just text.
A sealed trace is proof.
Anyone can type a transcript, edit one, screenshot one. That's why “here's what the AI said” does not count.
The insight: your session already runs over an encrypted, authenticated connection to the AI provider. The protocol relays that session through an independent notary that witnesses exactly what crossed the wire without ever being able to read it. Old cryptography, pointed at a new problem.
INTEGRITY
It hasn't been changed.
TIME
It existed by that moment.
Nothing readable ever leaves your machine. Nobody, including us, sees your work.
The cryptography is TLSNotary, open source. More in the spec.
APPLICATIONS
A platform for verified applications.
Anything built on sealed traces inherits their proof. Proof of Thought is the first app. The rest is for you to build.
WRITING
Proof of Thought
A writing app that keeps an authorship ledger: verified model output, your tracked contributions, imports. Prove your delta.
EARLY ACCESS sign up →
AUTHORS & STUDENTS
The flagged essay
A detector says AI. Weeks of sealed drafts and revisions say otherwise, and anyone can check.
DEVELOPERS
The audited commit
Your agents write code all day. When a commit ships a bug, faces an audit, or lands in diligence, the sealed session behind it is the proof you need. Works with Codex and Claude Code today.
DOMAIN EXPERTS: LAW, FINANCE & ACCOUNTING
The certified trace
Clients ask how AI touched the work. Attach the sealed trace as the exhibit.
SECURITY TEAMS
The agent flight recorder
When an agent misbehaves, self-kept logs can be altered. Sealed-as-it-happened records cannot.
ENTERPRISES
The certified discovery archive
Authenticated AI records for when litigation, audits, or regulators come asking.
RESEARCHERS
The published eval
Post the trace with the paper. The model really said it, and screenshot disputes are over.
CANDIDATES & EMPLOYERS
The take-home
The assignment says AI is allowed, within limits. A sealed trace shows exactly how you used it, and the hiring panel can check.
DEVELOPERS
Yours to build
Sealed traces are a new primitive. The spec, the OpenTelemetry trace format, and the verifier are open.
build on the Exalto Notary Protocol →- journal disclosure
- grant submissions
- chatbot disputes
- the lab notebook
- vendor proof packs
- clinical records
- freelance & agency invoices
- prompt-injection forensics
- tax preparer diligence
- insurance evidence
START CAPTURING YOUR TRACES
Verified material starts with Exalto Capture.
Exalto Capture is a dashcam for your AI work. Start it, point Claude Code, Codex, or your own tools at it, and every session is recorded on your machine, witnessed by the notary you select at setup. When you need proof, seal the trace and hand it to anyone.
Until that day, it's just a folder on your computer that nobody, including the notary, can read.
Sealed trace · receiptsealed ✓
- trace
- essay-draft.trace
- provider
- api.openai.com · TLS ✓
- messages
- 47
- sessions
- 6 · all sealed
- sha-256
- 9f2c 71e0 ···· d3a4 1b8c
- witnessed
- 2026-08-24 14:02:11 UTC
- notary
- Exalto Seal
Verified with the open source verifier
offline · no account · anyone can run
THE ECOSYSTEM
An open protocol. A choice of notary.
One standard at the base. Tools, notaries, and apps stack on top.
APP LAYER
WRITING
Proof of Thought
Keeps the authorship ledger.
early access →ANYONE'S
Yours to build
The primitives are open.
build →↓ BUILT ON SEALED TRACES
ON YOUR MACHINE
Exalto Capture
REC
- capturing
- api.openai.com · TLS ✓
- session
- essay-draft.llmtrace
- messages
- 47
witnessed as ciphertext · never readable
Exalto Capture
The desktop recorder: start it and work normally. Every session lands here, on your machine.
download →↓ THE NOTARY WITNESSES ONLY CIPHERTEXT · A SIGNED RECEIPT RETURNS
THE NOTARIES
OURS
Exalto Seal
Countersigns + timestamps. Never sees plaintext. Shared traces show as Exalto Seal Verified.
verify a trace → registry →THIRD PARTIES
Compatible notaries
Independent operators. Same standard, same checks.
SELF-HOSTED
Run your own
Open notary code. Point Capture at it.
↓ ALL OF IT SPEAKS THE SAME ENP STANDARD
THE NETWORK
Exalto Notary Protocol ENP
THE OPEN STANDARD
The OpenTelemetry trace format, capture rules, the offline verifier.
spec →Exalto Seal is just one notary among many to come: seal with ours, with a third party's, or with one you run yourself.
TRUST MODEL
A trace proves presence, never absence.
A SEALED TRACE PROVES
- The disclosed bytes traveled an authenticated connection with the named AI provider.
- They have not changed since capture.
- The named notary witnessed them at the stated time.
- With live capture enabled: the exact timeline as it actually unfolded.
IT CANNOT PROVE
- That every interaction was disclosed.
- Who was behind the keyboard.
- That no other AI or device was used.
- That an output was correct, lawful, or wise.
Learn more: full trust model →