# Scanning & Claims

### What is a Claim?

A **claim** links a TAGBASE verification to a specific webpage URL. When someone visits that page and opens the extension, they'll see the verification details.

### Adding a Claim via QR Code

1. **Navigate to the product page** where you want to add a verification
2. **Click the TAGBASE extension icon** in your toolbar
3. **Click "Add Claim"** to open the scanner
4. **Point your camera** at the TAGBASE QR code on the product or certificate
5. **Review the preview** - you'll see the verification details before confirming
6. **Click "Add Claim"** to link the verification to the current page

### Adding a Claim Manually

If you have a verification ID (e.g., vrf\_ABC123xyz):

1. **Click the TAGBASE extension icon**
2. **Click "Add Claim"**
3. **Enter the verification ID** in the text field (or paste a TAGBASE URL)
4. **Click "Continue"** to preview the verification
5. **Confirm** to create the claim

### Verification ID Formats

The extension accepts:

* **Verification IDs**: vrf\_ABC123xyz
* **TAGBASE URLs**: <https://tagbase.io/v/vrf\\_ABC123xyz>
* **QR codes** containing either format

### Managing Claims

* Claims are **publicly visible** to anyone with the extension
* Multiple claims can exist on the same URL
* Claims cannot be deleted once created (blockchain permanence)

### Troubleshooting

| Issue                     | Solution                                        |
| ------------------------- | ----------------------------------------------- |
| Camera not working        | Check browser permissions for camera access     |
| QR code not scanning      | Ensure good lighting and hold steady            |
| "Invalid verification ID" | Check the ID format starts with vrf\_           |
| Claim already exists      | This verification is already linked to this URL |