Verification
Anyone can check whether a battery passport was altered
A battery passport is only worth as much as the trust in its data. That is why every published version gets a checksum that is chained to the previous version.
- checksum per published version
- SHA-256 checksum per published version
- public verification page for every passport
- No account public verification page for every passport
- stays stored and traceable
- Every version stays stored and traceable
How it works
- 01
Publish
On publishing we turn the passport data into a uniquely ordered JSON form and compute a SHA-256 checksum from it.
- 02
Chain
Each new version also stores the checksum of its predecessor. If an older version is changed afterwards, the chain no longer fits.
- 03
Check
On the verification page of every passport we recompute all checksums on each visit and show whether every version and the whole chain are intact.
Why it matters
- The economic operator must ensure that the information in the passport is accurate, complete and up to date (Art. 77).
- Months can pass between an audit and a market inspection. The version chain shows which state was published when.
- Buyers, workshops and authorities do not have to trust the provider; they see the result of the check themselves.
What the checksum cannot do
The checksum proves that the data has not been changed since publication. It does not prove that the information is correct. That remains the responsibility of the economic operator who places the battery on the market.
How to check a passport
- 1Scan the QR code on the battery or open the passport address.
- 2Open the verification link on the passport page.
- 3You see every version with date and checksum and whether the chain is complete.
Create your first battery passport today.
The Pilot plan is free. One model, ten passports, no setup fee.