labs@atheron:~/industries/supply-chain/blockchains$ launch chain --validators

Provenance ledger

Declarations that travel down the supply chain.

The hard part of provenance is not the first tier; it is the mill, the smelter or the farm behind it. A private ledger fits when several companies declare what they bought and from whom, and each needs proof that a declaration was not changed after a buyer relied on it. For a single tier you already audit, a database is enough.

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// what matters here

What is different in this industry.

Declarations travel down the chain

Each supplier invites its own suppliers through the portal, so the brand sees tiers it has no contract with, without collecting every contact itself.

An auditor in the network

An independent auditor runs a node and countersigns audits and certificates, so a buyer can tell a checked claim from a self-declared one.

Terms stay between the two parties

Prices and volumes are kept in private data collections between buyer and seller; the shared record holds what is needed to trace, not the whole invoice.

Gaps are visible

Where a tier has not declared its own sources, the trace says so, which is what an honest due diligence report needs to state.

// example projects

Priced examples for this service.

Each one is hypothetical, labelled as such, and priced live from our rate card. Open any of them in the estimator and make it yours.

Example projectWeb appBlockchain

Multi-tier sourcing ledger

Hypothetical. Not a client, not a result.

// The problem

An apparel brand has to show where its cotton and trims come from, past its direct suppliers, and the answer is buried in mill invoices and declarations several tiers down that nobody can check.

// What we would build

A supplier portal where each tier, from the garment factory to the mill and the ginner, declares what it bought and from whom against shipping documents. Each declaration is recorded on a private permissioned ledger the brand, its main suppliers and an independent auditor each run a node of, so the brand sees the chain of custody and nobody upstream can quietly change a declaration once a buyer has relied on it.

// What is in it

Supplier portal in each tier's language, with invitations passed down the chain
Declarations of inputs and sources tied to invoices and shipping documents
Chain of custody from a finished product back to the raw material's origin
An auditor node that countersigns site audits and certificates
Gaps flagged wherever a tier has not declared its own suppliers
Exports for due diligence reports and customer questionnaires

// Stack

Next.js
Hyperledger Fabric (private, permissioned)
PostgreSQL
S3-compatible storage
Google Cloud

// estimate

Build: ≈ US$142,000 to US$217,000, delivered within 30 weeksCAD 202,100 to 309,000
Hosting: ≈ US$537 a monthCAD 765 a month
Support: ≈ US$2,500 a monthCAD 3,565 a month

Prices in your currency are estimates from today's Bank of Canada rate. All invoicing is in CAD or USD.

Timeline by milestone

Discovery: 2.9 to 3.4 weeks
Architecture: 0.4 weeks
Design approved: 5.4 to 9.4 weeks
Core features: 1.9 to 2.9 weeks
Full build: 0.9 to 1.9 weeks
Devnet: 3.4 to 5.4 weeks
Testing and fixes: 0.4 weeks
Testnet: 2.9 to 3.4 weeks
Launch: 0.9 to 1.4 weeks
Mainnet: 0.9 to 1.4 weeks
Partner nodes connected: 0.9 to 1.4 weeks

How it is paid

Deposit 20%: CAD 40,420 to 61,800
Discovery 2.2%: CAD 4,446.20 to 6,798.00
Architecture 5.9%: CAD 11,923.90 to 18,231.00
Design approved 2.2%: CAD 4,446.20 to 6,798.00
Core features 6.6%: CAD 13,338.60 to 20,394.00
Full build 4.4%: CAD 8,892.40 to 13,596.00
Devnet 17.7%: CAD 35,771.70 to 54,693.00
Testing and fixes 2.2%: CAD 4,446.20 to 6,798.00
Testnet 11.8%: CAD 23,847.80 to 36,462.00
Launch 2.2%: CAD 4,446.20 to 6,798.00
Mainnet 5.9%: CAD 11,923.90 to 18,231.00
Partner nodes connected 8.9%: CAD 17,986.90 to 27,501.00
Holdback, 30 days after launch (10%): CAD 20,210 to 30,900

Start from this example

// questions

Questions we get about this.

Does a ledger prove where material came from?

No system can prove a claim that was false when it was made. The ledger proves who declared what and when, ties it to shipping documents and audits, and makes any later change visible. That is what due diligence relies on.

How do deeper-tier suppliers take part?

Through the supplier above them, who invites them as a condition of the order, and a portal simple enough to use on a phone in their own language. We plan the onboarding with your sourcing team; it is often the larger part of the work.

How is this unlike traceability in one plant?

A plant traces the lots it receives from its direct suppliers. Supply chain provenance follows material across companies that never deal with each other, so invitations, the auditor and visible gaps matter more than batch records.

Back to the industry: Supply chain About the service: Private and public blockchains

// next

Not quite your project?

Tell us what you have in mind. We will come back to you with a range and the questions that would narrow it. Or book a call and talk it through.

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