Privacy Policy

Last updated: March 28, 2026

Lantern LLC ("Lantern," "we," "us") operates the Lantern Provenance System, including the website at lantern-us.com, the Glass web application at glass.lantern-us.com, the Lantern API, and the Lantern browser extension (collectively, the "Service").

Information We Collect

Account Information: When you create an account, we collect your email address, display name, and a password (stored as a bcrypt hash). We generate an Ethereum wallet address on your behalf.

Content Registration: When you register artwork, we store the SHA-256 hash of your image file, metadata you provide (title, description, creation tool), and the platform URL where your art is posted. We do not store your image files.

Platform Links: If you link a social media account, we store the platform name, your username, and the verification status.

Disputes: If you file a dispute, we store your email, name (if provided), claim description, and evidence URLs.

Browser Extension

The Lantern browser extension operates on supported art platforms (Twitter/X, Pixiv, DeviantArt, ArtStation, Instagram). The extension:

• Scans page text for Lantern IDs (format: LNTN-xxxxxxxx) to display verification badges
• Can hash images locally in your browser when you use the right-click "Verify with Lantern" feature. The image is never uploaded; only the hash is sent to our API
• Caches verification results locally for up to 1 hour using chrome.storage
• Does not collect browsing history, personal data, or any information beyond what is described above
• Does not track your activity across websites

Blockchain Data

Content hashes and creator wallet addresses are recorded on the Base blockchain (an Ethereum Layer 2 network). Blockchain records are public and permanent by design. This is necessary for the provenance verification system to function.

How We Use Your Information

• To provide the provenance registration and verification service
• To verify platform account ownership
• To process and resolve disputes
• To communicate with you about your account

Data Sharing

We do not sell your personal information. We share data only in these cases:

• Public verification data: Lantern IDs, content hashes, creator display names, wallet addresses, and linked platform usernames are publicly accessible by design for verification purposes
• Blockchain: Content hashes and wallet addresses are recorded on the public Base blockchain
• Legal requirements: If required by law or legal process

Data Security

We use industry-standard security measures including AES-256-GCM encryption for sensitive data at rest, bcrypt password hashing, HTTPS for all communications, and JWT-based authentication.

Data Retention

Account data is retained as long as your account is active. Blockchain records are permanent and cannot be deleted. You may request deletion of your account data by contacting us.

Your Rights

You may request access to, correction of, or deletion of your personal data by contacting us at contact@lantern-us.com. Note that blockchain records cannot be modified or deleted.

Changes

We may update this policy from time to time. We will notify you of material changes by updating the date at the top of this page.

Contact

For privacy questions, contact us at contact@lantern-us.com.