Cardano Feasibility Overview

Summary

Storing EU Digital Product Passports on Cardano is technically feasible. The Cardano Foundation has published a DPP Blueprint describing solution patterns, and the MPFS infrastructure provides production-grade Merkle Patricia Trie support with Aiken on-chain validators. The ecosystem is early-stage — see existing work for an honest assessment.

The core pattern: anchor hashes and identifiers on-chain, store full DPP data off-chain.

Architecture

graph TD
    A[Physical Product] -->|QR code / NFC| B[GS1 Digital Link URI]
    B --> C[Resolver]
    C --> D[Cardano L1]
    C --> E[Off-chain Storage]

    D -->|CIP-68 Reference NFT| F[On-chain Datum]
    F -->|contains| G[Merkle Root Hash]
    F -->|contains| H[IPFS CID / URI]
    F -->|contains| I[Product ID / GTIN]

    E -->|IPFS / Cloud| J[Full DPP JSON-LD]
    J -->|W3C VC envelope| K[UNTP Verifiable Credential]

    L[Verifier] -->|fetch datum| D
    L -->|fetch data| E
    L -->|Merkle proof| M{Hash matches?}
    M -->|yes| N[Data verified]
    M -->|no| O[Tampered / invalid]

Why Cardano

Property	Benefit for DPP
eUTxO model	Each product's DPP is a discrete UTxO — naturally maps to per-product records
Native multi-asset	DPP tokens are first-class citizens, no ERC-721-style contract overhead
CIP-68 datum format	Standard naming/datum convention for updatable per-product tokens (used for batteries; high-throughput batch anchoring for textiles)
did:prism	W3C DID method anchored on Cardano — stronger assurance than did:web
Hydra L2	High-throughput channel for real-time lifecycle events
Formal verification	Aiken/Plutus validators can be formally verified for compliance logic
Low fees	$0.01-0.13 per product at current prices

Key components

1. On-chain storage — CIP-68 tokens, datum structure, metadata labels
2. Access control — Plutus validators, role tokens, tiered visibility
3. Identity — did:prism, Hyperledger Identus, W3C VC integration
4. Cost analysis — per-product and at-scale economics
5. Scalability — L1 throughput, Hydra L2, batching patterns
6. EU integration — registry, GS1, UNTP interoperability
7. Existing work — Cardano Foundation DPP standards, pilots

Cardano Foundation DPP Standards

Key infrastructure

Component	Maturity	Repository
DPP Blueprint	Conceptual (docs only)	cardano-dpp-standards
MPFS (Merkle Patricia Tries)	Production-grade (Aiken + Haskell)	off-chain, on-chain, cage
did:prism / Identus	Active open source	hyperledger-identus
Scantrust wine pilot	Deployed (30+ wineries)	See existing work