CardProof is a neutral, secure way to create verifiable proof-of-possession for collectibles. In the collectibles ecosystem, grading companies establish authenticity and condition, while marketplaces facilitate buying and selling. What has long been missing is a trustworthy way to document who physically possessed an item and when. CardProof exists to fill that gap with a cryptographically time-stamped record that is independent of any marketplace, grading company, or platform.
Historically, collectors have relied on informal methods like “coining” an item—writing a name or code on a piece of paper and taking a photo. Those methods ask viewers to take someone at their word. They don't establish who the person is, when the photo was taken, or whether the evidence can be independently verified. CardProof transforms that same basic act into something materially stronger. Through a structured capture and analysis process, CardProof creates verifiable evidence of physical possession at a specific moment in time, answering the critical questions handwritten notes cannot.
CardProof charges a small fee to create a permanent, time-stamped proof-of-possession record. Viewing and verifying proofs is always free. The result is a professional, portable proof that can be shared anywhere and verified by anyone—without relying on trust, reputation, or platform-specific claims.
Prove once. Share everywhere.