Defaults punish clean mills
70 % of Turkish steel is scrap-EAF, but the default assumes blast furnaces.
IEEE ClimateChain 2026 · Carbon Markets & Emissions Transparency
Every tonne carries its carbon. Once.
Verified CBAM data for steel mills, from Turkish invoices to an EU customs declaration, with a smart contract that stops double counting and carbon laundering.
- No wallet needed
- Real EVM in your browser
- Also live on Ethereum Sepolia
- About 5 minutes
CBAM passport valid on ledger
6,000 t hot-rolled coil · Kocaeli → Duisburg
Verified
0.354
t CO2e per tonne
EU default
2.671
t CO2e per tonne
Importer saves on this shipment€593,717
EIP-712 + ML-DSA-65 signedMerkle disclosures1 precursor verifieddeclared once
- €10.8 bn
- CBAM goods from Türkiye to the EU in 2025
- Eurostat Comext
- 2.671
- t CO2e/t: EU default for Turkish hot-rolled coil, 2026
- Reg. (EU) 2025/2621
- 0.354
- t CO2e/t: the demo mill, verified
- Ingot, EU method
- −€99
- per tonne for the EU importer
- Q3 2026 price €82.32
Data can be counted twice
The same “green” tonnes sold to two buyers; re-rollers passing on cleaner figures.
Verifiers are scarce, data is private
Few EU-accredited verifiers yet; no mill wants to email its energy bills.
How it works
Five steps, five colours. The same colours follow each actor through the demo.
- 01
AI reads the evidence
Turkish invoices and reports, every number quoted.
- 02
EU method, in code
Mass balance, precursors, benchmarks.
- 03
Verifier signs
Checks, then an EIP-712 signature.
- 04
Ledger counts
Each tonne verified, sold and ended once.
- 05
Importer declares
Passport checked in seconds.
Four doors the contract keeps shut
Each is a real revert you can trigger with the demo's red “Try to cheat” buttons.
Verified once
No overlapping periods for the same product.
PeriodOverlaps
Sold once
Never more than the verified tonnes.
ExceedsVerifiedQuantity
Ends once
Declared or consumed, never twice.
AllocationNotOpen
No carbon laundering
Precursor carbon is recomputed on chain.
BelowPrecursorEmissions
Cutting carbon finally pays
On default values a mill's emission cuts are worth nothing to its EU buyers. With a verified passport, the EU carbon price reaches the furnace.
Method and sources€8.23
per tonne, for every 0.1 t CO2e/t the mill cuts
€594k
saved on one 6,000 t shipment in the demo
46–410 kt
CO2e a year avoided in Türkiye, low to high scenario
See it refuse a cheat in five minutes
Fictional companies, real EU rules, a real contract running in your browser.