Agentic trust, provable at scale.
Every agent workflow ships with its data and its rule. Anyone can re-run it.
The rule travels with the data.
Preparing the proof.
Serial AWAITING
The market on the verification gap
Over 40% of agentic AI projects will be canceled by the end of 2027, due to escalating costs, unclear business value or inadequate risk controls.
Underneath all of it sits the trust tax. Every autonomous action has to be logged and defensible to an auditor, and right now that cost is too high.
Doing the work is hard. Checking it is not.
The first run costs real money. The second is close to free, and a sudoku shows why in fifteen seconds.
The first run costs money. The second is nearly free.
244 dead ends to solve it. One sweep to mark it.
Where it breaksSudoku is the easy case, because its rule is the same for every puzzle ever printed. Here the rule has to be pinned before anything is checked, and choosing the right rule is still a human call.
Where it breaksThe rule has to be pinned first. That is still a human call.
Trust the agent. Re-run its work.
The verdict is deterministic: the answer is recomputed from the inputs it declared, offline, and it either matches or it does not.
Agnostic
Any model, any vendor, any cloud, any format, any kind of data. It asks one thing: does the answer come back the same?
Any model, any vendor, any format.
Same answer, or not.
Open source
Apache 2.0, end to end. Read the code, run it, fork it, keep it. Nothing about the verdict rests on a vendor’s word.
Apache-2.0, end to end.
Read it, run it, keep it.
Re-derivable
Recompute the answer from the committed inputs, offline. It matches or it does not. No model sits on the verdict path.
Recompute it offline from the declared inputs. Match or not.
Use cases
Open a sector for the agentic workflows and value they unlock.
Open a sector for the workflows and value they unlock.
Three dates. The first one has already passed.
Three dates. The first has passed.
The EU AI Act wants the record made while the work happens. A write-up after the fact is not evidence.
The EU AI Act wants the record made while the work happens, not after.
Tell people when they are looking at AI output, and be able to show that you did. Article 50, transparency
Say when output is AI. Prove you did. Art. 50
The grace period for systems already on the market runs out. Article 111(4), recital 38
The grace period ends. Art. 111(4)
A high-risk system has to record what it did, for as long as it runs. Annex III, Article 12(1)
High-risk systems record what they did. Art. 12(1)
Dated 3 August 2026. Regulation (EU) 2024/1689, as amended by Regulation (EU) 2026/1744. Article 19 puts the keeping duty on whoever built the system, Article 26 on whoever runs it. All eight articles →
Live demo: strike and verify a receipt
This one is live. Change a single byte in the receipt below and the seal answers for it. Live. Change a byte, watch it void.
Break it yourself.
Tamper one byte below and watch it void, or read how it works.
Tamper a byte. How it works →
- org
- Specimen · non‑production
- control
- SEC 17a-4(f) · SR 26‑2
- case_id
- C-2317
- inputs
- policy_rules.v.yaml · features.jsonl · model.sha
- amount_cents
- 1000000
- committed
- re-derived
- bits matched
- bits changed
- hashes equal
Computing receipt...
What fails the check.
What fails.
Altered after the fact
A record changed after it was sealed.
Changed after sealing.
Read moreBackdated
A creation time that never happened.
A time that never happened.
Read moreNo origin
Evidence that traces back to no record.
Traces back to nothing.
Read moreInvented source
A cited source no record can produce.
Not in any record.
Read moreThose four are the families. Behind them sit 165 catalogued reason codes, and every verdict arrives carrying exactly one. Twenty-four of them, in plain words:
165 catalogued reason codes. Only one is a pass.
The files
- A file that changed after sealing
- A file the record never declared
- A file that should exist and does not
- A ledger with a broken chain
The citations
- A quote its source does not contain
- A source nobody can fetch
- A source that changed since it was cited
- A citation anchored to nothing
The re-run
- An answer that does not come back the same
- A check that never actually ran
- A check that ran out of time
- An input that will not hold still
The rules
- A rule swapped for a weaker one
- A test no answer could ever fail
- Grading code that arrived inside the bundle
- An enforcement mode quietly switched off
The grades
- A confidence grade rounded up
- An upgrade nobody earned
- A proof obligation that is missing
- A “proved” flag the prover cannot back
Time and keys
- A timestamp that predates its event
- A signature from an expired key
- A challenge answered twice
- A gap in the event counter
The catalogue, with what each code means → Read 5 August 2026.
Roll out trusted AI at scale.
Start with one workflow on the record. The thousandth ships checked the same way.
One workflow on the record first. The thousandth checks the same way.
Book a call hello@nexiverify.com Have your own team re-run one first. veriker is open and free ↗ Re-run one yourself. veriker is free ↗Patents pending