Service contract — 0DATA YIELD

Article 1 — Purpose and nature of the service

The service includes, depending on the subscribed tier (Journal, Sealed, Settlement): the installation of a measurement device (the "Box") or the connection to an existing source, the periodic sealing of the measurements using a chained cryptographic hash (SHA-256), the anchoring of the head hash on public ledgers (Hedera HCS, Base) — hourly (Sealed, Settlement) or daily (Journal), and the provision of a public verification link, a dashboard, and periodic reports.

Article 2 — Oracle limit (essential clause)

Article 3 — Liability cap

Article 4 — Client's obligations

The Client warrants:

• the integrity, calibration, and compliance of its measuring equipment;
• the maintenance of the physical and network access required for the service to operate;
• notification to 0DATA within seventy-two (72) hours of any intervention on the measuring equipment.

Article 5 — Ownership, portability, reversibility

Article 6 — Service level (SLA)

0DATA undertakes: 99% monthly collection and anchoring availability; sealing every 15 minutes (Sealed, Settlement) or hourly (Journal), with any gap exceeding one hour detected, reported to the Client within one hour, and mentioned in the monthly report; anchoring every hour (Sealed, Settlement) or daily within 24 hours (Journal); a daily eIDAS qualified timestamp on the head hash (1 token per day); and replacement of a faulty Box within 10 working days. Penalties: a 5% reduction of the monthly fee per whole point of missed availability, capped at 30%, such penalties being final and releasing. Should availability fall below 95% for three (3) consecutive months, the Client may terminate as of right without compensation.

Article 7 — Term, price, payment

Term: 24 months from commissioning (Sealed and Settlement tiers), renewable by tacit renewal for successive 12-month periods, unless terminated by either party with three (3) months' notice. Price: according to the subscribed tier (see pricing appendix), setup payable on signature, monthly fee payable in advance. The first Box, included in the setup, is transferred to the Client; any additional Boxes remain the property of 0DATA and are returned at the end of the contract. Any late payment suspends the service after a 15-day formal notice, the historical journal remaining exportable by the Client.

Article 8 — Confidentiality and data

0DATA does not access raw production data beyond the sealed measurements required for the service; only the hashes and the signed aggregated measurements (value + timestamp) leave the site in one-way push mode — no detailed raw data. The parties undertake to keep the information exchanged confidential for the duration of the contract and for 5 years after its term.

Article 9 — Force majeure

Neither party may be held liable for a failure resulting from a force majeure event within the meaning of Article 1218 of the French Civil Code, including in particular the physical destruction of the site, a prolonged interruption of the telecommunications networks, or a prolonged unavailability of the public anchoring ledgers. In such cases, obligations are suspended; any measurement interruption is recorded and proven in the journal, with no possibility of erasure. If the force majeure lasts more than 60 days, either party may terminate without compensation.

Article 10 — Governing law and disputes

The contract is governed by French law. Any dispute shall be submitted to the competent courts of Rennes, after a 60-day attempt at amicable resolution.