Transpareo Time Machine

Open-source Digital Product Passport renderer. This is not a live demo: the 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 published snapshots.

Scrub a signed passport's timeline to replay every earlier version, and open the verification chip to see which keys signed the version you are looking at. Verdicts are computed in your own browser, from the proof embedded in the snapshot. The three seeds differ on purpose: two proof types, and one plain snapshot that carries no proof at all.

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
Design
Minimal stylesheet: little beyond the logo

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
Design
Deliberately loud custom stylesheet, showcasing the range

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
Atelier Barro
Hand-Thrown Terracotta Vase
Atelier Barro. A small pottery studio's passport showing how minimal a DPP can be: a few properties, no EPCIS events, no components - even the photo could be omitted.
History
Single snapshot, June 2025
Contents
10 properties, no supply-chain events
Languages
English, German, Portuguese
Design
No stylesheet, plain renderer defaults

Not signed: one frozen snapshot with no manifest and no proof. The renderer stays a neutral viewer - no timeline, no verification chip - since a passport that never claimed verifiability is not badged for lacking it.

Ceramics Unsigned