ConceptWeb platform· Distribution
Ledgerly Ops
An operations dashboard that unifies orders, stock, and invoices so a growing distributor can stop reconciling spreadsheets.
- Next.js
- TypeScript
- PostgreSQL
Blockchain · Agriculture
Provenance TraceConcept
A traceability record that follows each batch from farm to shelf, with a public verification page behind every product QR code.
- Client
- No client (concept)
Concept project — no real client. Created to show how we would approach this kind of product.
- Service
- Blockchain development
- Industry
- Agriculture
- Platforms
- Web, Mobile web
- Delivery scope
- Suitability assessment
- Smart contracts
- Partner portal
- Public verification page
- Review preparation
- Technologies
- Solidity
- Node.js
- Next.js
- IPFS
Overview
The scenario
Provenance Trace imagines a cooperative of farms selling premium produce to retailers who want proof of origin. Several independent organisations handle each batch, so no single party's database is trusted by all.
The problem
Retailers and export buyers ask for proof that a batch came from certified farms and stayed within cold-chain limits. Paper certificates are easy to copy and hard to check.
Our solution
Each handover — harvest, grading, transport, delivery — is signed by the responsible partner and anchored to a shared ledger. Shoppers and buyers scan a QR code to see the batch's verified journey without needing an account or a wallet.
User journey
How someone actually uses it
- 1
Register the batch
The farm records the harvest and receives a batch QR label.
- 2
Hand over
Each partner scans the batch and signs its step in the partner portal.
- 3
Anchor
Step records are hashed and anchored on-chain; documents are stored off-chain.
- 4
Verify
A buyer or shopper scans the QR code and sees each verified step.
- 5
Investigate
If a step is missing or late, the portal highlights it for follow-up.
Mobile app
Mobile screens
2 screens from the Provenance Trace app.
Screen 1 of 2: Shoppers scan the QR code to see a verified journey.
Swipe, use the arrow keys, or pick a thumbnail. Screens are concept designs with demo data.
Web
Web screens
2 screens from the web application.
Screen 1 of 2: Partner portal: every batch and its verified steps.
Swipe, use the arrow keys, or pick a thumbnail. Screens are concept designs with demo data.
Read descriptions of all 4 screens
1. Web
Partner portal: every batch and its verified steps.
Partner portal dashboard listing recent batches and their verification progress
2. Web
Each partner signs only their own step.
Handover form where a carrier confirms pickup and temperature
3. Mobile
Shoppers scan the QR code to see a verified journey.
Public verification page on a phone showing a verified batch
4. Mobile
Every step shows who signed it and when.
Step detail on a phone showing who signed and the record fingerprint
Key features
What it does
- 01
Signed handovers
Each partner signs only the steps they are responsible for.
- 02
Public verification
A mobile page anyone can open from the QR code — no wallet needed.
- 03
Off-chain documents
Certificates and photos stored off-chain with on-chain fingerprints.
- 04
Partner roles
Farms, processors, carriers, and retailers each have scoped permissions.
- 05
Exception alerts
Late or missing steps are flagged to the cooperative.
- 06
Export view
A printable batch history for buyers who need paperwork.
Approach
Design and development
Design
The public page was designed for a shopper standing in an aisle: a clear verified/unverified state first, details second, and no blockchain jargon.
Development
Minimal smart contracts record step fingerprints and partner roles; everything else lives in a conventional application. Contracts are tested and prepared for independent review before any mainnet deployment.
More work
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Want something like Provenance Trace?
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