See a real attestation happen.
Then verify it yourself.
Everyone's clinical-AI demo is one patient in a chat window — an answer you have to take on faith. This one is different: nothing below is a mockup. Sign a document with a real key, watch it become a durable record, and check it in your own browser.
The AI drafts it. A named physician signs it and answers for it. You keep the record.
Watch an attestation happen.
A fitness, wallet, or chat app can’t draw this step — the click that binds a signature to an output. Click Attest and the draft is hashed, signed with an Ed25519 key, and written to a durable record that survives a refresh. The signature is real and verifiable. Sample data; no patient information.
In-home companion care
…in-home companion care is medically necessary to prevent falls and preserve safe mobility and independence for a patient with progressive mobility decline.
Approve is a click. Attest is a record. Draft 1 of 3.
Signed record
0 signed & recordedNothing signed yet. Click Attest — a signed, durable record appears here.
Each record is an Ed25519 signature over the SHA-256 of the exact text, verifiable against a published public key — change one character and it fails. Independent audit and anchoring live at hashcare.com. This is a demonstration key — real cryptography, not a live clinical signature by a licensed physician.
Three moments — and the middle one is the whole company.
The AI drafted it.
Fluent in seconds — and worth nothing on its own. A draft is fluent, not accountable. No code path lets it reach a patient, payer, or record unsigned.
A named signer bound their name to it.
One click stamped an NPI, a timestamp, and an Ed25519 signature over the exact text. Not “verified” — accountable. Someone now answers for this specific output.
You verified it — trusting no one.
Your own browser recomputed the hash and checked the signature against a published key. Change one character and it fails. That is what auditable means.
One layer of a sovereign stack.
Your context lives on your disk. The harness binds a named signature to any output that matters. The proof is anchored so it holds up years later. No cloud hub in the middle owning your record.
Everyone else makes the draft free. We make it signed.
A chat answers a question. A signed record is something a payer, a court, or a family can rely on. That is the difference — and it is the whole product.