Product
Why should anyone believe your carbon number?
Because you don't have to be believed. Every calculation produces a receipt anyone can re-check.
Turn a claim into something checkable
A carbon figure is usually taken on trust. Here every calculation produces a receipt: a commitment to the inputs, to the emission factors and to the result, tied together by a stated methodology version.
Receipts are written into an append-only chain, batched into a Merkle tree, and the root is published on a public blockchain. From that point the number is time-stamped and any later change to the underlying record becomes detectable.
Your customer verifies it themselves
The verification page does not ask our servers for a verdict. It recomputes the hashes and folds the Merkle path in the visitor's own browser, using the same algorithm the backend uses.
That turns a sustainability claim into something a buyer, an importer or an auditor can settle in seconds without a meeting — and without you sending them your underlying data.
What you get
Calculation receipt
Input, factor-bundle and result commitments plus the methodology version, for every figure.
Append-only audit chain
Records are chained, so removal or edits are detectable rather than silent.
Public anchoring
Merkle roots published on a public blockchain, time-stamping the batch.
Browser-side verification
Anyone can re-run the proof themselves — no account, no API key, no trust in us required.
Evidence links
Each figure points back to the invoice, sensor reading or record behind it.
Selective disclosure
Proofs commit to hashes, so a number can be verified without exposing the data that produced it.
FAQ
Will our auditor accept data from your system?
Auditors accept evidence, not systems. What we can do is make the evidence cheap to examine: every figure keeps its inputs, the emission factor with its source and year, and the calculation that connects them, so the auditor is checking a trail rather than reconstructing one.
We do not issue assurance and we are not an accredited body. Anyone telling you their software makes an audit unnecessary is describing something other than an audit.
Is data in your system "verified"?
It is verifiable, which is not the same word. Every figure carries what is needed to re-run it — inputs, factors, method — and a way to confirm the record has not changed since it was made.
Verified means an accredited third party examined it and issued an opinion. Making a figure verifiable makes that examination faster and cheaper. It does not replace it, and we do not describe self-declared data as verified.
Why is there a blockchain in a carbon product?
For one narrow job: publishing a hash somewhere we do not control, so that a record can later be shown to have existed unchanged. That is a property no database we own can offer about itself.
Nothing about your business goes on chain — only a fingerprint. The point is provenance, not the ledger, and if a better append-only timestamp existed we would use that instead.
Which chain, and is it mainnet?
Polygon, and the anchoring runs on the Amoy testnet. We say testnet because it is testnet.
Moving to mainnet is a deliberate step with cost and operational implications, taken with a customer rather than announced as though it had already happened.
Can our customer check a figure without asking us?
Yes, and without asking us either. The verifier on this site runs entirely in their browser: they paste the certificate, the browser recomputes the Merkle proof and compares it with the anchored root.
They see the carbon figure and its provenance. They do not see quantities, prices, or anything else in the record.
Where do your emission factors come from?
From published datasets, and every factor carries its source and year into the result. The free calculator on this site uses a 43-factor catalogue derived from the audited catalogue in the platform, with the version stamped on the output.
Some entries are weaker than others — an ageing polyester factor, some without a redistributable licence — and those are flagged rather than quietly averaged in.
Make your carbon data impossible to doubt.
Join forward-looking companies turning emissions into verifiable, audit-ready proof.
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