AGB.

1. Scope and provider

These terms govern the use of CRESTAG, a software service offered by REVERCE GmbH, Hofaue 35, 42103 Wuppertal, Germany ("we", "us"). CRESTAG is directed at businesses and professional users (B2B); it is not offered to consumers.

2. The service

CRESTAG lets workspaces verify the C2PA provenance of images, manage them in a library, derive channel-specific renditions with optional AI-disclosure labels, and export derivatives carrying a C2PA manifest signed with the workspace's signing identity.

3. Accounts and workspaces

Access requires an account and membership in a workspace. Workspace owners and admins manage members, invitations, policies and signing settings and are responsible for the activity of the members they admit. Credentials must be kept confidential.

4. Customer content

You retain all rights to the images and other content you upload. You grant us the non-exclusive right to store, process, render and sign that content solely to provide the service. You warrant that you hold the rights required to upload and process the content and that its use does not infringe third-party rights or applicable law.

5. Acceptable use

You must not upload unlawful content, attempt to circumvent workspace isolation or signing controls, misrepresent provenance, or use the service to produce misleading authenticity claims. We may suspend access that endangers the integrity or security of the service.

6. C2PA signatures and provenance

A CRESTAG signature attests that a derivative was processed and exported through CRESTAG for the signing workspace at a given time. It is not a statement about the truthfulness, authorship or legality of the depicted content. Whether third parties trust a signature is determined by their own trust lists and validators and is outside our control. Verification results reflect the manifest data embedded in the file at the time of checking.

7. Retention and deletion

Workspaces can configure a retention period for stored image files. After expiry, binary files are permanently deleted; provenance and audit records are retained as evidence. Deleted binaries cannot be restored.

8. Availability

We provide the service with reasonable skill and care but do not warrant uninterrupted availability. Planned maintenance and factors outside our control (including third-party infrastructure) may affect availability.

9. Liability

We are liable without limitation for intent, gross negligence, and injury to life, body or health. For slight negligence we are liable only for breaches of essential contractual obligations (Kardinalpflichten), limited to the damage typical and foreseeable for this type of contract. Liability under mandatory statutory provisions remains unaffected.

10. Term and termination

The agreement runs for the term agreed with the workspace. The right to terminate for cause remains unaffected. Upon termination we make stored content available for export for a reasonable period, after which the retention and deletion rules of section 7 apply.

11. Changes

We may amend these terms with reasonable notice. If you do not object within the notice period, the amended terms apply; we will point this out in the notification.

12. Governing law and venue

German law applies, excluding the UN Convention on Contracts for the International Sale of Goods. Exclusive place of jurisdiction is Wuppertal, Germany, where permissible.