Health Passport by ♾️ WeOwn.Health 🏩 [.OCA]

Prove you qualify for a clinical trial by disclosing a single bit — eligible or not — never the medical record behind it. Health Passport is We Own Health's zero-knowledge trial-matching project, built for the Midnight.Network Buildathon (September 2026).

The working product is live today at https://trials.weown.health: choose "I am a Patient" to prove eligibility against mock-issued health credentials — the record behind the proof never appears on screen — then open "I am a Trial Sponsor" to see the verdict arrive the way a trial site would receive it: pass or fail, one bit, no health data.

The open-source core (Apache-2.0) is at https://github.com/WeOwnHealth/cohorti: the eligibility logic written as Compact circuits — 2 stateful (issueCredential, proveClaim) + 4 pure helpers (2 key derivations, marker derivation, commitment derivation) — a HealthClaimGate contract with deploy scripts, an in-process harness that runs the real circuits, and 13 vitest test cases in-repo.

How a match works: trial criteria are public; biomarker values, identity, and consent records stay private as client-side witnesses; consent is scoped and time-bound, with revocation on the Wave-2 roadmap; no lab values are disclosed on-ledger. The repo's worked example: prove cholesterol below 200 mg/dL without disclosing the lab value.

We Own Health builds patient-controlled health tools in the open, and this profile tracks that work through the Midnight.Network Buildathon and beyond.

We Own Health's mission: patients answer eligibility questions without surrendering their medical history. Health Passport turns clinical-trial matching into a one-bit disclosure — criteria public, biomarkers private witnesses, consent scoped and time-bound — shipped as open source (Apache-2.0) on Midnight for the Midnight.Network Buildathon (September 2026), with a live demo and a Compact-circuit core plus its vitest suite in the open at github.com/WeOwnHealth/cohorti.

Clinical-trial eligibility screening is all-or-nothing for the patient. To let a trial check even one criterion, a person is asked to hand over large parts of their medical history — records move before anyone knows whether the trial is even a fit.

That cost shows up three times:

For patients, the disclosure is disproportionate. Proving "my cholesterol is below 200" should not require releasing the lab report, let alone the history around it — so many people never start, and those who do wait on manual screening.

For sponsors, screening is slow and expensive, and every unnecessary record collected is liability: data gathered to answer what is, in the end, a yes/no question.

For research, the trust barrier in front of screening keeps eligible people unmatched — the people trials need most are the ones the process gives the least reason to trust with their data.

Health Passport starts from the absurdity at the center: eligibility is a one-bit question, but today answering it costs the patient their privacy.

Health Passport flips the disclosure model: criteria public, health data private, verdict one bit.

• Public: a trial's eligibility criteria (for example, cholesterol below 200 mg/dL) are published for anyone to read.
• Private: the patient's biomarker values, identity, and consent records never leave their side — they enter the proof as private witnesses, client-side.
• One bit: the sponsor receives eligible / not eligible. Not the lab value, not the history, not identity.

Under the hood, eligibility logic runs as real zero-knowledge proofs written in Compact: issueCredential issues a scoped, time-bound health credential; proveClaim proves the criterion against it; the HealthClaimGate contract enforces the rules, and no lab values are disclosed on-ledger.

Everything is open source under Apache-2.0 at https://github.com/WeOwnHealth/cohorti — 2 stateful circuits + 4 pure helpers, deploy scripts, an in-process harness running the real circuits, and 13 vitest test cases in-repo. The full flow is walkable now at https://trials.weown.health: issue mock credentials as a patient, prove eligibility, and watch the sponsor view return a single-bit verdict with no health data on screen.

Built on Midnight for the Midnight.Network Buildathon (September 2026).

Want to grow through just grant funding

Global