Frequently asked questions about CardProof
CardProof is a neutral proof-of-possession service for physical collectibles. We help collectors create verifiable records that prove they possessed a specific item at a specific point in time. This is not proof of ownership or authenticity—it's proof of possession.
CardProof currently supports trading cards (sports, TCG, non-sports), sealed products, memorabilia, and other collectibles. We're expanding to support additional categories based on user demand.
We offer a free tier that allows you to create a limited number of proofs per month. For unlimited proofs and additional features, we offer Pro and Enterprise plans. See our pricing page for details.
You'll be given a unique 6-character verification code that you write on paper. During the capture session, you photograph your item along with this handwritten code. This creates a time-stamped record linking you to physical possession of the item at that moment.
The handwritten verification code prevents the use of pre-existing photos or digital manipulation. Each code is unique and expires after use, ensuring the photos were taken specifically for this verification session.
The capture session has a 90-second time limit to ensure all photos are taken in immediate succession, reducing the possibility of switching items between shots. This tight window reinforces the authenticity of the proof.
No. CardProof is strictly a proof-of-possession service. We do not verify authenticity, grade condition, or assess value. For graded items, we record the existing certification information but do not validate it.
Yes. Proofs can be transferred to other CardProof users. The transfer records are permanently logged in the proof's history. You can optionally require the recipient to capture new photos to complete the transfer.
When you sell a verified item, you can transfer the proof to the buyer. The proof history will show the transfer, maintaining a complete chain of custody. The buyer can then create their own fresh proof if desired.
You control the visibility of each proof. Public proofs are viewable by anyone with the link. Unlisted proofs are only accessible via direct link. Private proofs are visible only to you. You can change visibility at any time.
We collect the information you provide (email, username, item details) and the photos you upload during verification. We do not sell your data to third parties. See our Privacy Policy for complete details.
Yes. You can export all your data at any time (GDPR compliance) and permanently delete your account. Note that deleting your account will revoke all your proofs.
Trust Levels (L1-L3) indicate how thoroughly a user's identity has been verified. L1 (email verified) allows up to 5 proofs, L2 (phone verified) allows up to 20 proofs, and L3 (ID Verified & Trusted) allows unlimited proofs. Higher levels provide greater assurance of the holder's identity.
Proof Freshness indicates how recently the proof was created. Fresh proofs (< 7 days) are considered most reliable for current possession. Older proofs still prove historical possession but may not reflect current status.
Yes. All images are stored securely using industry-standard encryption. Images are processed to generate file hashes that can be used to verify the images haven't been tampered with after upload.