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

Provenance records

One record of a work's history, shared between institutions.

When works travel between institutions, each keeps its own copy of the provenance research and the loan papers. Usually signed PDFs in a shared folder are enough. When several institutions want one record that none of them controls alone, a private ledger can hold it.

Start a project See the example projects

// what matters here

What is different in this industry.

Fingerprints, not documents

Only a fingerprint of each document goes on the ledger; the documents stay private to the members.

A node per member

Each institution runs a node, so no single one holds or can quietly change the record.

A plain history

The history of each work, as a readable report any member can download.

Honest about the choice

If a shared folder and signed PDFs do the job, we tell you before we build a ledger.

// 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

Shared provenance record

Hypothetical. Not a client, not a result.

// The problem

Several museums lend and borrow works between them, and each keeps its own copy of the provenance research, condition reports and loan agreements, which drift apart over the years.

// What we would build

A shared web app where each institution records provenance research and loan documents, with a fingerprint of each document written to a private permissioned ledger that every member runs a node of. A signed PDF often does this job; the ledger helps when several institutions want one record that none of them holds alone.

// What is in it

Provenance research and loan documents recorded by each institution
A fingerprint of each document written to a private ledger
A node per member, so no single institution holds the record
A plain history of each work any member can download
Documents themselves kept private to the members who share them

// Stack

Next.js
Hyperledger Besu (private, permissioned)
PostgreSQL
DigitalOcean Toronto

// estimate

Build: ≈ US$90,400 to US$138,000, delivered within 22 weeksCAD 128,700 to 196,900
Hosting: ≈ US$176 a monthCAD 250 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: 2.4 to 4.4 weeks
Core features: 1.4 to 2.4 weeks
Full build: 0.9 to 1.4 weeks
Devnet: 2.4 to 3.9 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

How it is paid

Deposit 20%: CAD 25,740 to 39,380
Discovery 2.5%: CAD 3,217.50 to 4,922.50
Architecture 6.7%: CAD 8,622.90 to 13,192.30
Design approved 2.5%: CAD 3,217.50 to 4,922.50
Core features 7.5%: CAD 9,652.50 to 14,767.50
Full build 5%: CAD 6,435 to 9,845
Devnet 20.2%: CAD 25,997.40 to 39,773.80
Testing and fixes 2.5%: CAD 3,217.50 to 4,922.50
Testnet 13.4%: CAD 17,245.80 to 26,384.60
Launch 2.5%: CAD 3,217.50 to 4,922.50
Mainnet 7.2%: CAD 9,266.40 to 14,176.80
Holdback, 30 days after launch (10%): CAD 12,870 to 19,690

Start from this example

// questions

Questions we get about this.

Does a ledger prove a work's provenance?

No. It shows who recorded which document and when. The research and its conclusions are your curators' and their advisers'.

Can a lending museum see another member's private files?

No. Members see only the documents shared with them; the ledger holds fingerprints, not files.

What happens if one museum leaves the group?

The record stays with the remaining members' nodes, and the leaving museum keeps a copy of its own entries.

Back to the industry: Museums, arts and culture 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.

Start a project Book a call