Help center
Everything you need to buy, sell and keep art on ChainChum, step by step.
Start here
Buying
- Explore and discover artBrowse, search and filter the ChainChum marketplace, and read everything a work page tells you before you buy.
- Buying on ChainChumHow checkout, shipping, certificates and returns work when you buy art on ChainChum.
- Certificates of authenticityWhat a ChainChum certificate proves, how to verify one, printed certificates and QR stickers, gifts, corrections, and why you do not need a crypto wallet.
- Your orders, downloads and certificatesFollow an order from payment to delivery, download digital purchases, keep your certificates of authenticity, and see the emails we send and how refunds work.
- Likes, follows and reportingLike works to keep them, follow shops to hear when they list something new, share what you find, and report a listing or shop that breaks the rules.
Selling
- Open your shopSign up, confirm you are 18 or older, say what you came to do, set up your artist or family shop and add a shipping profile.
- Create a listingPhotograph your work, add its details and let ChainChum save as you go. Includes photo tips and the optional listing assistant.
- Publish and pricingSet a price, understand the 5% fee and the $1 certificate fee, sell numbered editions, and see what happens when a listing goes to review.
- The Art VaultKeep a private photo archive of every piece, sold or not, and turn any Vault item into a listing in one tap.
- Share your workSpread the word about your listings and your shop so more buyers see your art.
- Family art and safetyHow parents sell their children's art on ChainChum, and the rules that keep children's identities private.
- Get paid: payouts and identitySet up payouts with Stripe, get your identity verified for the Verified seller check mark, and learn when the money from each sale reaches you.
- Your sales: shipping and bookingsSee every sale in Studio, ship it and add tracking, check what you receive and when, and follow digital sales and lesson bookings.
Classes and lessons
- Teacher studio: run your first classSet up a class, print the roster, slips and stickers, photograph the drawings after each lesson, and send each parent their own child's work the same day.
- Sell lesson seatsList a dated lesson at a place, let people book a seat through checkout, see who is coming, and know when you are paid and what happens if plans change.
- For parents: join your child's classUse the slip from your child's art class to join on ChainChum, then see, save and delete your child's drawings in a private gallery only you can open.
- Teach online lessonsList a lesson held over Zoom, Google Meet or Teams, share the video link only with families who book, give each family a class code, and get the children's drawings afterwards.
- For parents: join an online lessonBook a seat in an online art lesson, find the video link, join the class gallery with your code, and send your child's drawing to the teacher afterwards.
Account
- Account, theme and privacyChange how ChainChum looks, edit your profile, download everything we hold about you, or close your account.
- Notifications, emails and the app on your phoneRead your ChainChum notifications, choose what reaches you in the app, by push and by email, stop reminder emails, and install ChainChum on your iPhone or Android phone.
Common questions
Is ChainChum an NFT marketplace?
No, it is an art marketplace. Every work sold here comes with an NFT certificate of authenticity on the Base blockchain, minted with no wallet or gas fees, but tokens are never bought or sold on their own on ChainChum.
How much does it cost to sell on ChainChum?
Opening a shop and listing work cost nothing upfront. ChainChum keeps 5% of each sale, card processing included, and a one-time $1 certificate fee per work comes out of its first sale. If a work never sells, you pay nothing.
Do I need a crypto wallet?
No. You sign in with email or Google and pay by card. Certificates are recorded on a public blockchain behind the scenes, and you never handle keys or coins.
Can children use ChainChum?
No. ChainChum is for adults 18 and older. Parents can sell their children's art from their own account, without ever showing the child's name or face.
How do you know the art is human-made?
Every seller is a verified adult, every photo is screened for AI-generated images, and listings that raise questions are checked by a person before they go live.
What is a certificate of authenticity?
A record issued when a work is published (or when a handmade or digital piece sells) and moved with every sale, stating who made the piece and what it is. Anyone can check it by scanning its QR code or opening its page.
Still stuck? Contact us