Verify a water record
A demo farm with made-up soil readings, sealed and signed the same way a real record is. Every check below runs in your browser, and nothing is sent anywhere.
Pumping reports, water credits, insurance claims and contracts all rest on farm records. Anyone who relies on one should be able to check it, not take it on trust.
- Contents
- 1,008 soil readings at 1, 2 and 3 ft, with each day's checks and model results
- Signatures
- 98. Every step and every day seal is signed.
- Scheme
- ECDSA P-256 with SHA-256 over canonical JSON (keys sorted)
- Public key
- SHA-256 …
The record
14 days, each sealed and linked to the day before
The check recomputes a fingerprint for every reading and every step, then tests each signature against the public key. Each day's seal also names the seal of the day before. Pick a day to see its steps.
This historical synthetic record is kept exactly as signed. The archived sensor-check step is displayed as Synthetic sensor rule. The current product uses WATCHDOG for crop stress and separate rules for sensor checks.
September 2026
Day 5 of 14
How one day is sealed
Each step signs its own result and points to the step before it. Pick a day above to see its steps.
Test the seal
Try to change the record
Change one reading and check again. A careless edit breaks the day's fingerprint. A careful forger can recompute the fingerprints, but cannot make the signatures match without AgWaterAI's private key.
Change the reading and nothing else.
Change the reading, then recompute every fingerprint so they match again.
Take the whole day out of the record.
Who checks records like this
Anyone who has to rely on a farm's water records without taking anyone's word for them.
Groundwater agency
Confirm that reported pumping and soil records were not edited after the season.
Water-credit verifier
Trace a claimed figure back to the original readings and every step in between.
Corporate water buyer
Check that the records behind a water project are the originals before relying on them.
Insurer or lender
Confirm the records behind a claim or a loan are the ones captured on the day.
Lawyer
Show when each record was sealed and that nothing in it changed since.
Grower
Show anyone you choose that your records are unchanged, without handing over the rest of your farm data.
What the signature check can and cannot show
- The readings have not changed since they were sealed.
- Which day each reading belongs to, and that no day was removed or reordered.
- Every step (quality checks, models, daily report) is accounted for and signed by the key holder.
- That a sensor was installed or calibrated correctly. A field audit does that.
- Any water-savings figure. That needs a baseline and a stated method.
- Anything about data that was never collected.
Check it yourself
Download the demo record and the public key and run the same checks with any tool you trust.
- For each reading, take the SHA-256 of its JSON with keys sorted. Combine them in pairs into one root fingerprint per day; it must equal the root in the day's sensor step.
- For each step, take the SHA-256 of its id, its result and its parents' fingerprints (JSON, keys sorted). It must equal the step's fingerprint, and its ECDSA P-256 signature must check against the public key.
- Each day's seal must name that day's report and the previous day's seal, and its signature must check too.