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Ledger

What anyone can see: each verified statement, how its tonnes were split, and where each allocation ended. Process data, invoices and meter readings never appear here, only their committed root.

Also live on Ethereum Sepolia

Registry 0x81700eedd80142d65859616101e521729fd95473 · the demo replayed on 2026-10-24

✓ Source code verified ↗Check a passport anchored here →
  1. ✓ Deploy CbamPassportRegistry
  2. ✓ Fund Anatolia Verification Ltd.
  3. ✓ Fund Atlântico Verificação Ltda.
  4. ✓ Fund Demo Gusa Ltda.
  5. ✓ Fund Marmara Demo Steel
  6. ✓ Fund Rhein Metals GmbH
  7. ✓ Fund Lombardia Tubi S.p.A.
  8. ✓ Accredit Anatolia Verification
  9. ✓ Accredit Atlântico Verificação
  10. ✓ Register Anatolia's ML-DSA-65 key
  11. ✓ Register Atlântico's ML-DSA-65 key
  12. ✓ Register the smelter
  13. ✓ Register the mill
  14. ✓ Smelter's verified pig iron statement
  15. ✓ Pig iron to the mill (DN-2026-0642)
  16. ✓ Pig iron to another buyer
  17. ✓ Mill's Q3 2026 coil statement (consumes the pig iron)
  18. ✓ 6,000 t to Rhein Metals
  19. ✓ 4,500 t to Lombardia Tubi
  20. ✓ Rhein Metals declares its allocation
  21. ✗ Refused: sell 170,000 t of the same coil again

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