Document integrity
Fake diplomas, duplicate titles
Official documents can still be forged, and verification relies on weeks of letters between agencies. Disputes over duplicate land titles make the news again and again.
NusaChain network · block 73,618
A narrative for policymakers
The technology is proven. It's just been overlooked.
Why NusaChain, the people's blockchain behind the NUX asset, deserves a place in Indonesian government as a digital trust layer. Not as a replacement for the Rupiah, but as a public ledger nobody can quietly alter.
17+
years its core architecture has been tested in the real world, since 2009
0
premine: no coins quietly allocated to the founders
18M
NUX supply cap locked in the code; no more can be printed
32 byte
fingerprint (hash) is enough to prove a document is authentic
MIT
open-source license. No license fees, and anyone can audit the code
Chapter 1 · The paradox
We keep hunting for new technology while the most proven one sits right in front of us
Every year, government agencies spend budget on new information systems. Many are good. But almost all share the same weakness: anyone with administrator access can change data without leaving a trace.
That problem was actually solved in 2009. An anonymous figure called Satoshi Nakamoto released a record-keeping system that no one owns, no one can erase and everyone can inspect. It's called a blockchain. For more than 17 years it has been attacked, tested and criticized by hackers, academics and regulators worldwide, and it keeps running.
NusaChain doesn't reinvent that wheel. It adopts the Bitcoin Core codebase directly: the UTXO model, Proof of Work consensus and SegWit active from the first block. On top sits the X11 algorithm, used by other crypto networks since 2014, all wrapped in an Indonesian identity.
"What's new about NusaChain is the flag. The engine has been proven for longer than most of the apps on our phones."
2009
Bitcoin's first block is mined
The birth of a tamper-proof public ledger. This architecture is NusaChain's backbone.
2014
The X11 algorithm appears
A chain of 11 cryptographic hash functions used by public networks for over a decade. NusaChain uses the same algorithm.
2016
Governments start recording assets on-chain
Georgia became an early pioneer, anchoring fingerprints (hashes) of land titles to a public blockchain.
2020
Bitcoin Core v0.20 is released
The generation of Bitcoin Core code that, according to the NusaCoin whitepaper, forms NusaChain's foundation. The work of hundreds of contributors.
2025
NusaChain launches, with no premine
Genesis block on 1 December 2025. 18 million NUX supply, a block every ~6 minutes, halving every 300,000 blocks. Every coin must be mined, including by the founders.
2026
Offline transactions: GEMA Taobot
Transactions signed offline can travel over a mesh network or sound waves, then get broadcast once any device reaches the internet.
Chapter 2 · Problems we know well
Four governance problems that keep coming back
These problems aren't due to a lack of good intentions. They come from how data is stored: centrally, editable, and hard for the public to verify.
Budget accountability
Village funds and social aid
Hundreds of trillions of rupiah flow through long chains. The people the money is meant for often have no simple way to check where it actually went.
Resilience
Disasters and no-signal zones
Indonesia faces thousands of disaster events every year, and many remote villages still have weak signal. When networks go down, payments and records go down with them.
Digital sovereignty
Vendor lock-in
Many government systems depend on paid licenses and closed code. When the contract ends or the vendor leaves, data and control are held hostage.
Chapter 3 · What's possible today
Four real applications, without replacing existing systems
NusaChain doesn't replace government apps. It works behind them as a digital notary that can't be bribed, never sleeps, and keeps records anyone can check.
01
Document notarization with OP_RETURN
Documents stay on the agency's servers. Only their fingerprint, a 32-byte SHA-256 hash, is written to NusaChain. Change a single letter and the fingerprint no longer matches.
- Diplomas, transcripts and certificates
- Land titles and deeds
- Procurement documents, contracts and minutes
- Medical records and regional financial reports
Document createdStays in the agency system, never published
Hash SHA-256Reduced to a 32-byte fingerprint
Recorded on NusaChainVia OP_RETURN, permanent and timestamped
Verified in secondsAnyone can check it, no paperwork
02
Village funds with multiple signatures
Multi-signature lets a wallet release funds only with approval from several parties. For example 2 of 3: the village head, the treasurer and a village council member. No single person can withdraw alone.
- Approval rules enforced by code, not just written in an SOP
- Every expense permanently recorded and auditable
- Residents can follow along on the public explorer
Village headSigns the request
TreasurerSigns; the 2-of-3 rule is met
Council memberNot needed this time, but can always check
Funds released & recordedThe trail can't be erased by anyone
03
Transactions during disasters, without internet
The UTXO model allows transactions to be signed on a device offline. With GEMA Taobot they pass from phone to phone over a mesh network or sound waves. Once one device finds a signal, the transaction is broadcast.
- Distributing relief supplies at disaster sites
- Record-keeping on outer islands and remote areas
- A fallback when central infrastructure fails
Signed offlineThe private key never leaves the device
Hops via mesh / soundBluetooth mesh, QR or sound waves
Reaches a connected gatewayOne connected device is enough
Confirmed by the networkFinal once in a block, so still forgery-proof
04
Aid and donations the public can trace
Every NusaChain address is visible to anyone via the explorer. For disaster appeals, CSR programs or grants, transparency no longer waits for a year-end PDF. The flow of funds can be seen at any time.
- Donors can see where their money goes
- Managing bodies get strong proof of accountability
- Can be combined with notarization to anchor proof of delivery
Fundraising address publishedAnnounced to the public
Funds arriveThe balance is visible live on the explorer
DistributionEvery outflow recorded with its time
Audited by anyoneFrom journalists and auditors to citizens
"Public trust is built on records that citizens can check for themselves, from the market to the village office."The principle behind NusaChain
Try it yourself · 30 seconds
Change one letter and the whole fingerprint changes
This is the principle behind document notarization. Type or edit the text below. Only the 64-character code on the right is recorded on NusaChain; the document itself never leaves your hands.
SHA-256 fingerprint · 32 bytes
computing…
Chapter 4 · An honest comparison
Ordinary database, consortium blockchain, or public blockchain?
Many "government blockchain" projects worldwide actually use closed (permissioned) chains controlled by a handful of parties. The result looks more like an expensive database than a public ledger.
Scroll right to see the NusaChain column
| Aspect | Central database | Consortium blockchain | NusaChain (public) |
|---|---|---|---|
| Who can change past records? | Admins, without a trace | Consortium members, if they agree | No one |
| Publicly verifiable? | No | Limited, needs permission | Yes, via the explorer |
| License cost | Often paid | Costly integration & vendors | Zero, MIT license |
| Auditable code | Depends on vendor | Partly | Fully open |
| Architecture track record | Decades | Typically < 10 years | Bitcoin-based, 17+ years |
| Works when the internet is down | No | No | Yes, via GEMA (mesh/sound) |
| Single point of failure | Yes (central server) | Few nodes | None; stronger with every new node |
| Storage per document | MB – GB | Varies | 32 bytes (hash only) |
Databases are still needed to store document content. NusaChain acts as a proof layer on top, so the two complement each other.
Chapter 5 · Why has it been overlooked?
The internet, too, was once dismissed as an academic toy
There are three reasons this technology rarely makes it into government meeting rooms. First, the word "crypto" instantly suggests speculation. Second, regulation has only recently matured. Third, few people explain it in the language of public policy.
Yet several countries have already moved, each with different approaches and results. The lesson is clear: what works is using blockchain as trust infrastructure, not as a currency bet.
Estonia
State data integrity
Has used hash-chain technology to protect the integrity of public-service data, including health records, since the early 2010s.
Georgia
Land titles
Since 2016 has anchored fingerprints of land documents to a public blockchain to prevent title tampering.
Bhutan
Digital asset reserves
Uses surplus hydropower to mine and hold crypto assets as part of national reserves.
El Salvador
A valuable lesson
Made Bitcoin legal tender in 2021, then relaxed that in 2025. The takeaway: start with infrastructure, not currency.
NusaChain is not a replacement for the Rupiah
Law No. 7 of 2011 establishes the Rupiah as Indonesia's only legal tender, and that doesn't need to change. Since January 2025, crypto assets have been supervised by the OJK. This proposal keeps NusaChain on the safest path: as record-keeping and proof infrastructure, in line with Indonesia's e-government (SPBE) and One Data initiatives.
Chapter 6 · A proposed roadmap
Start small, measure, then scale
Adoption doesn't need to start with a big decision. The NusaCoin whitepaper's own roadmap already includes pilot projects in finance and government. Here are the proposed steps.
Phase 1 · 3 months
Document notarization pilot
One agency or state university anchors hashes of diplomas or decrees on NusaChain. No existing system needs replacing.
Metric: verification time, from weeks to seconds
Phase 2 · 6 months
Pilot villages
A few villages record fund spending with multi-signature wallets and an explorer dashboard residents can open.
Metric: audit findings, resident trust levels
Phase 3 · 12 months
Disaster-response drill
Field-test GEMA offline transactions with regional disaster agencies in high-risk areas, tied into relief logistics.
Metric: distribution time, recipient record accuracy
Phase 4 · ongoing
Nationally run nodes
Local governments and universities run NusaChain nodes. The more institutions secure the network, the stronger and more sovereign it becomes.
Metric: node count, geographic spread
Frequently asked
Before your next meeting
Is NusaChain meant to replace the Rupiah?
No. The Rupiah remains the only legal tender under Law No. 7 of 2011. This proposal positions NusaChain as record-keeping and proof infrastructure, for example for document notarization and budget transparency.
Would confidential state documents be exposed?
No. Only a 32-byte SHA-256 fingerprint is written to NusaChain. The document stays in the agency's system, and a hash cannot be reversed to read the content.
What technology does NusaChain use?
NusaChain is built from the Bitcoin Core codebase with the UTXO model, Proof of Work consensus and the X11 algorithm. NUX supply is capped at 18 million with no premine, and the code is open under the MIT license.
How can a local government get started?
Start with a small pilot, such as notarizing diplomas or decrees at one agency for three months, then measure verification time and cost. From there, expand to village funds, disaster response and institution-run nodes.
The technology is ready. Who will go first?
The first agency to adopt it isn't taking a big risk. It's setting a new standard for how a state safeguards its people's trust.