Grading &
authentication.
Cards are only worth what you can trust. Here's exactly how The Bubble Art verifies every listing — cert-backed grades, an honest raw-card standard, and a Digital Passport that travels with each card.
Cert-verified, not just claimed
A graded card has been slabbed by an independent grading company — PSA, BGS, CGC or TAG. Its grade and certification number are printed on the case and recorded in that company's public database.
The grade & company are recorded
Every graded listing states the grading company and the numeric grade (1–10) exactly as they appear on the slab.
A cert number is required
Graded cards can't be listed without a certification number. It's the key that ties the physical slab to the grader's records.
Anyone can verify it
Buyers cross-check the cert number against the grading company's own lookup — so a "PSA 10" on The Bubble Art is a PSA 10 you can confirm yourself.
Honest by photo, clearly disclosed
A raw card hasn't been graded. That's completely fine — most cards are raw — but we never dress it up as something it isn't.
The photo standard
Raw listings show front, back and edge photos — clear, straight-on and well-lit — so you can judge centering, corners, surface and whitening yourself.
A plain disclosure
Every raw card carries the line: "Ungraded — condition as represented by seller, not third-party verified." No ambiguity.
Seller accountability
Raw condition is the seller's representation. It's tied to their account, their reviews and the platform's buyer protections.
A Digital Passport for every card
Grading proves what a card is. The Digital Passport proves where it's been — a permanent, branded record of authenticity and ownership that carries the card's grading block and its full provenance chain.
Grading block, built in
The passport carries the card's grading details — company, grade and cert for graded cards; the clear ungraded disclosure for raw ones.
Provenance that travels
Listed → sold → resold. The chain of custody updates itself on every sale, so the history moves with the card, not the seller.
One link, shareable
Each passport has its own page and QR — scan or share it to prove a card is exactly what it claims to be.
Buy and sell with certainty
Browse graded and raw cards, or list your own in minutes. Every card, verified its own way — and every card, a passport.