When you buy an artwork on drops.snark.art, you will be asked to pay by credit card, and have an option to fill in your Tezos wallet address. If you didn't create your wallet prior to the drop, no worries, you can do it after the purchase. Note: We aim to allow a purchase directly with Tezos crypto currency if you have a wallet in place with Tezos coins.
The NFTs in the drop will be transferred directly into your wallet within 72 hours and you will be able to access them on the Contract Killers project page at Snark.art.
When you are logged in on the Contract Killers project page, you will see your wallet address on the page and clicking on the NFT you own should show your ownership and allow you to Register in order to receive your gift from Nancy Baker Cahill.