MicrostockGroup

A CGI creator purchased a set of 3D nature assets under a commercial license from superhivemarket.com.

He creates new derivative works landscape animation renders for which he holds the copyright and sells them through stock agencies.

What if it turns out that the seller was selling stolen 3D assets, and the store's terms and conditions state that the seller is not responsible for the legality of the products, even if the seller is untraceable?

Stock agencies have strict agreements for content creators. Does this also apply to legitimate CGI creators?

Adobe Stock Contributor Agreement

"Indemnification Obligations. Without limiting your obligations in the General Terms, you will indemnify us and our
subsidiaries, affiliates, officers, agents, employees, partners, licensees, and licensors (including users) from any claim,
demand, loss, or damages, including reasonable attorneys' fees, arising out of or related to Works or other content that
you submit to us, your use of the Website, or your violation of the Terms. We have the right to control the defense of any
claim, action, or matter subject to indemnification by you with counsel of our own choosing. You will fully cooperate with
us in the defense of any such claim, action, or matter. Any amount that is or may be owed to you under section 5
(Payment) above may be offset and reduced by any amount owed by you pursuant to your indemnity obligations
hereunder, without demand or notice to you."

After all, the CGI creator has proof of purchase (invoice, licenses, page screenshots, emails, and consent from the seller in the store's support)—does this evidence protect them from stock agencies, the DMCA, and the 3D asset creator? Against refunds until they're aware of the violation, etc.?