Building a Digital Product Passport with Java and Cardano
summary
EU requires digital product passports from 2027 and the demo shows a Java service that builds, signs and submits a Cardano UTXO transaction carrying DPP metadata (example payload “Hello JCon 2026”) to preprod where it confirms within a block (20s block time) and is viewable in Cexplorer and Eternal Wallet. Implementation uses Cardano client lib, indexed with YaciStore, and stores large documents off‑chain with IPFS while on‑chain metadata is limited to 16 kilobytes.
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chapters (12)
- 0:00Introduction and speaker background
- 2:34What is a digital product passport
- 5:47Understanding blockchain technology
- 9:57Why blockchain for digital product passports
- 13:49Cardano's UTXO model and features
- 17:58Cardano's Java ecosystem
- 23:33Setting up for development
- 28:30Live coding example
- 35:10Building a digital product passport demo
- 40:27When to use blockchain in architecture
- 41:49Advanced data structures for trust
- 44:17Next steps and resources
