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Executory proof · Hedera + Base

The proof that pays.

A card signs. A fingerprint is anchored on a public ledger. Settlement happens all by itself — no third party, no paperwork, no dispute.

● PIN chip signature ● immutable Hedera anchoring ● Base + Chainlink settlement
The mechanism

Four links. Zero humans.

Every step leaves a publicly verifiable trace. Nobody — not even 0DATA — can alter or stop it.

Card

The PIN chip signs the commitment. The PIN decides; the key never leaves.
secp256k1 · WYSIWYS · The K Key ↗

Anchor

The SHA-256 fingerprint is sealed on Hedera HCS. Immutable, timestamped.
Hedera HCS · hash-only

Rule

The contract verifies who signed (ecrecover) and that the proof is anchored.
Base · Chainlink · ecrecover

Payment

The money flows by itself to the right party. Without 0DATA in the loop.
auto · indisputable
Public proof

A proof, not a promise.

Here is a fingerprint that is genuinely sealed and anchored. Click and verify for yourself on the public ledger — nothing sits on our servers.

Sealed and anchored on-chain Hedera HCS · demo
1839c096…46dc355c1d8e
0.0.10605616
#236
1793229655.849717104
Verify on the public ledger ↗ The hash is public, the content stays encrypted — 0DATA does not read it.
How it works

Three actions. The rest is automatic.

01 / SEAL

The proof becomes a fingerprint

A reading, a delivery, a milestone: everything reduces to a SHA-256 fingerprint, anchored on Hedera. Immutable and timestamped to the second.

02 / SIGN

The card binds responsibility

The holder types their PIN: the chip signs. The private key never leaves the component. The PIN binds, like a bank card.

03 / SETTLE

The money flows by itself

The contract verifies the signature and the anchor, then triggers payment. No more chasing, no more disputes, no more delays.

Use cases

Where trust costs a lot.

Three sectors that already pay to verify — and can now pay on the proof.

Results-based financing

The funder pays on the verified milestone

World Bank, Gavi, AFD: the field agent signs the milestone (well, school, campaign), the proof is anchored, the tranche is released. No more third-party auditors at 200 000 €.

Verification market: billions · Effort: medium · 0–3 months
SLA & maintenance

The penalty settles itself

The technician signs, uptime is measured, the penalty triggers automatically when the provider slips. For telecoms and towercos, disputes become impossible.

Telecom / towercos · Effort: low · 0–3 months
Odometer

The signed reading kills fraud

30 to 50% of used cars have a tampered odometer. The mechanic signs the reading at every service: the history becomes tamper-proof and interoperable.

Garages & used cars · Effort: low · 3–12 months
Why nobody can copy it

Three building blocks. None is enough alone.

Hardware root

The signature comes from a chip, not a click — it's the K Key. The PIN decides, the component signs: like a bank card, but anchored on-chain.

Neutral anchoring

The fingerprint lives on Hedera, not on our servers. 0DATA stores nothing, so it can neither tamper with nor be attacked on the content.

Trustless settlement

The contract verifies the signature and the anchor before paying. Trust lives in the code and the chain, not in a third party.

Your commitment executes itself.

Let's talk about a concrete case. A 90-day pilot, measured against your current verification cost.