Transpareo Time Machine

Open-source Digital Product Passport renderer. This is not a live demo: both pages below render the demo seed data bundled in the open-source project on GitHub, so you can see exactly what the renderer produces from a signed snapshot.

Scrub either timeline to replay every earlier version of the passport, and open the verification chip to see which keys signed the version you are looking at. Both verdicts are computed in your own browser, from the proof embedded in the snapshot. The two seeds carry different proof types on purpose.

Nordic Wear
Essential Crew Neck T-Shirt
Nordic Wear. A textile passport with material breakdown, care, and supply-chain events.
History
6 versions, 2024 to 2026
Contents
4 materials, 7 supply-chain events
Languages
English, German, French

Signed with eddsa-jcs-2022: one Ed25519 proof set over the whole document, carrying the issuer's signature and Transpareo's countersignature.

Textile Ed25519
Volturra Energia
Volturra Pulse 2000
Volturra Energia. A battery passport with cell chemistry, carbon data, and recyclability.
History
4 versions, 2024 to 2025
Contents
10 components, 5 supply-chain events
Languages
English, German, French

Signed with ecdsa-sd-2023: a P-256 proof from the W3C selective-disclosure suite, whose derived form lets a reader be shown a verifiable subset of the fields.

Battery Selective disclosure