Supply-chain custody passport

miombo_passport · v1.0.0

Binds a shipment, its allocated assay batches and a frozen nature-risk passport snapshot into a signed chain-of-custody certificate.

Inputs

• staged or in-transit shipment and its asset;
• one or more allocated assay batches and allocated mass;
• active public disclosure token;
• current nexus and transition-risk evidence when available;
• issuing identity and certificate timestamp.

Calculation and controls

The method freezes an asset passport snapshot, serializes it deterministically for hashing, and binds the snapshot hash and batch allocations into a signed certificate manifest. The QR payload includes a certificate prefix and passport-hash prefix for public lookup. Later custody events append to the certificate history.

Outputs

• certificate and shipment identity;
• frozen passport snapshot and hash;
• assay-batch allocations;
• manifest hash, QR verification payload and printable certificate reference;
• EUDR relevance indicator based on configured commodity scope.

Limitations

The certificate proves integrity of the recorded snapshot and custody events; it does not independently prove physical possession, assay accuracy, legal title or regulatory compliance. Commodity relevance is not a legal determination of EUDR applicability.