BELFAST · NHS · HACK BELFAST 2026

Verifiable proof of every public-service interaction.

A patient taps to confirm. A receipt mints to Solana in under a second, for less than a penny. Three parties hold indisputable proof — the trust, the citizen, the funder.

Try patient demo See trust dashboard
Finality412 ms
Fee£0.0004
NetworkSolana devnet
On chainhashes only
£0.0MWasted at Belfast HSC each year on missed outpatient appointments
0NI patients waiting for first consultant-led appointment (June 2025)
0.0%NI outpatient DNA rate — worst in the UK
£0.0MNI-wide annual cost of missed outpatient appointments
How it works

One missing receipt. Three losing parties. One fix.

Two-way confirmation closes the gap that costs trusts £7.3M and pushes patients back to the bottom of a 52-week list. The receipt is the cryptographic evidence layer beneath every existing platform.

01

Patient taps to confirm

Single screen, single action. Wallet signs in the background. Sub-5-second total.

02

Receipt mints to Solana

Tamper-proof PDA derived from [appointment_id, patient_pubkey]. 412 ms finality, £0.0004 fee.

03

Trust dashboard updates live

Receipts stream into the operational view. Funders verify on chain. The citizen owns their copy.

Who Vouch serves

Three things people actually feel.

FOR PATIENTS

Seen faster.

DrDoctor at Guy's & St Thomas' cut DNAs by 17.2% trust-wide — £2.6M annual benefit. Two-way confirmation pulls people forward off a 52-week list.

FOR STAFF

Doing work that's valued.

Clinical time stops being wasted in empty rooms. Admin teams stop adjudicating he-said-she-said disputes. Money flows back into care.

FOR CITIZENS

You own your record.

Portable. Revocable. GDPR-by-design. The state has its copy. For the first time, so do you.

Why Solana

Sub-cent fees are not a feature. They are the precondition.

Annualising the 1.37M outpatient appointments in Northern Ireland alone, the chain choice is the difference between an idea and a product.

Ethereum£4.1Mper year, NI alone
Typical L2£205kper year, NI alone
Solana£1,100per year, NI alone

Annual settlement cost · 1,370,901 receipts × prevailing fee at typical 2025 conditions.

Privacy by construction

Public chain. Private records. Three layers of defence.

L1

On chain

Only deterministic hashes. Pubkeys, status enum, timestamps. No names, no NHS numbers, no specialty, no condition.

L2

Off chain

Trust holds appointment_id → clinical detail. Citizen holds pubkey → identity. Neither alone deanonymises.

L3

Token-2022 (v2)

Confidential Transfers via ElGamal encryption. Schema is forward-compatible with the v1 receipts shipping today.

GDPR Article 9 special-category health data never touches the chain. The receipt proves the interaction happened, without ever publishing what it was about.
Market opportunity

From one Belfast pilot to a £100M ARR public-services category.

SOM24 months
£2.5M ARR

5 NI HSC trusts × £400k + 3 councils × £150k + 2 universities × £40k. Named buyers, named procurement windows.

SAM5y UK + Ireland
£100M ARR

192 NHS trusts × £400k + 153 LAs × £150k + 50 HE/FE pilots × £40k. Bottom-up arithmetic.

TAMappointment value at risk
£20bn

124.5M NHS England outpatients + 30M GP appts + EU EHDS €11bn 10-year savings target.

BELFAST 2036

Patients seen faster. Staff doing work that's valued. You own your record.

Try patient demo See trust dashboard