Pussy Riot’s Nadya Tolokonnikova and street artist Shepard Fairey are encouraging supporters to express their “proof of protest” on the blockchain through an open-edition collection of non-fungible tokens (NFTs) to raise funds for Ukraine.

The collection, titled Putin’s Ashes, will be available for purchase Friday on Tezos-based NFT marketplace Objkt. All of the proceeds from the collection will be donated to Ukrainian soldiers who have been battling Russian invasion since the beginning of 2022.

The open edition will start minting on Friday at 10 a.m. PST and end on February 3. Each NFT will be priced at 10 TEZ (about $11). Pussy Riot plans to open the collection with a protest and performance Friday in Los Angeles at the Jeffrey Deitch gallery.