NFT and Blockchain Art: What Legal Questions Survived the Bubble

The Bubble Popped. The Legal Problems Didn't.

NFT art trading volumes peaked at $2.9 billion during the 2021–2022 boom, then collapsed to roughly $23.8 million — a decline that made headlines for its speed and scale. By Q3 2024, quarterly trading volume across the broader NFT market had sunk to a three-year low of $1.5 billion, down 19% year-over-year. The platforms followed. Nifty Gateway — one of the first marketplaces to bring serious money and serious artists into the space — shut down permanently on February 23, 2025, citing declining volumes. Dozens of others scaled back or quietly disappeared.

What didn't disappear: the legal questions. Who actually owns an NFT when the marketplace hosting the underlying file goes dark? Do on-chain royalty terms hold up if a buyer resells through a platform that ignores them? If someone minted work that incorporated another artist's image, does the statute of limitations protect them — or has it not even started running yet? These aren't theoretical. Artists who minted during the boom, collectors who bought work that's now hard to access, and platforms still operating in a shrunken market are all sitting with unresolved exposure.

This guide works through the legal questions that survived the crash: ownership and what it actually means on-chain, royalty enforcement after secondary sales, copyright infringement liability for minters and buyers, tax treatment the IRS has not fully clarified, and what happens when a platform closes. If you participated in the NFT market and still have open questions, most of those questions still have answers worth knowing.

What Buyers Actually Got (Hint: Not Your Copyright)

An NFT is a blockchain token. It is not the artwork. What gets recorded on-chain is a reference — typically a URL or a content hash — that points to where the image or video file lives. The file itself stays off-chain, usually on a server or decentralized storage network. That distinction matters enormously for what a buyer actually received when they paid five figures at a 2021 auction: a provenance record, and whatever license the smart contract (or accompanying terms) spelled out. Not an embedded file. Not an IP assignment.

Copyright does not transfer with the token. Under U.S. law, copyright ownership moves only through a written agreement signed by the rights holder — a rule that applies to NFT sales exactly as it applies to any other artwork transaction. The March 2024 joint report from the USPTO and U.S. Copyright Office confirmed this explicitly: existing copyright law governs NFT transactions fully, no new statute is needed, and purchasing an NFT does not transfer the underlying copyright unless the smart contract or a separate written agreement says otherwise. Most did not say otherwise. Most buyers who thought they "owned" a piece of digital art owned, in legal terms, a record that they had purchased a token associated with that art.

The federal agencies framed the gap between buyer expectations and buyer rights as one of the defining IP problems of the NFT era, and their recommended remedy was education rather than new legislation. That framing is useful for artists: it confirms that the rules were never ambiguous from a legal standpoint, only from a marketing one. If you minted work and never assigned your copyright, you still hold it. If you sold without an explicit license grant, your buyers received the token and nothing more — which means uses of your image beyond personal display were never authorized, and may still be actionable.

The Royalty Promise That Marketplaces Broke

One of the central selling points of NFTs for artists was on-chain royalties — typically 5 to 10 percent of every secondary sale, encoded into the smart contract and paid automatically. For a working artist, the appeal was real: a piece that appreciated in value would keep generating income every time it changed hands, indefinitely. That promise unraveled systematically, and it unraveled because it was never a legal guarantee in the first place.

The mechanism behind NFT royalties is the Operator Filter — an on-chain tool that marketplaces voluntarily implemented to check whether a transaction should trigger a royalty payment. The key word is voluntarily. OpenSea formally disabled its Operator Filter effective August 31, 2023, making creator fees optional for all new collections. The proximate cause was competition: Blur launched in October 2022 with zero marketplace fees and optional royalties, and on-chain data showed 80% of total NFT trading volume migrating to zero-fee platforms by early 2023. OpenSea followed because it had no choice in a market that had already voted with its volume.

The structural problem is deeper than a business decision by two companies. NFT smart contract royalties are not independently enforceable legal obligations — they are voluntary commitments by marketplaces. The Ethereum blockchain cannot distinguish a commercial sale from a peer-to-peer transfer or a gift, which means royalty payments cannot be triggered by the chain itself. They depend entirely on the marketplace recognizing the transaction as a sale and choosing to route the fee. When enforcement depends on marketplace goodwill rather than civil legal authority, the income stream survives only as long as market incentives support it.

For artists who built a revenue model around secondary royalties, the practical consequence was a loss of income with no legal recourse. There is no breach-of-contract claim against a marketplace that changes its royalty policy, no enforcement mechanism that survives a platform's decision to stop honoring the terms. If secondary royalty income was part of your financial model and you want to protect future earnings, the only durable path is negotiating royalty obligations directly into written agreements with buyers — a provision that courts can enforce, unlike a smart contract term that a platform can switch off.

Your Art Got Minted Without Your Permission

Unauthorized NFT minting is copyright infringement — no new law required, no legal ambiguity. The person who minted your work without a license copied it, distributed it, and in most cases commercially exploited it. OpenSea acknowledged in 2022 that over 80% of items created with its free minting tool were plagiarized works or spam, which tells you how common this was during the boom and how little the platforms did to stop it.

The enforcement reality, though, is brutal. Your first instinct may be to get the NFT taken down, and a DMCA takedown notice to the marketplace will remove the listing — that part works the way it does for any hosting platform. But a takedown only operates at the marketplace layer. The unauthorized token itself remains permanently on-chain. Blockchain immutability means you cannot delete an unauthorized NFT; the record of that minting event exists on the ledger regardless of what any marketplace does. The practical consequence is that the infringing token can resurface on any other marketplace that indexes the same chain.

Identifying who minted it is a separate problem. The wallet address behind an unauthorized mint is typically pseudonymous, not anonymous — exchanges that hold know-your-customer (KYC) data can be compelled to disclose identity through subpoena. Practitioners have used John Doe discovery and exchange KYC subpoenas in analogous crypto fraud contexts to unmask wallet holders, and the same procedural path is available here, though it adds time and cost to what is already an uphill pursuit.

The single most important variable in all of this is whether you registered your copyright before the infringement occurred. Under 17 U.S.C. § 412, timely registration unlocks statutory damages of $750 to $150,000 per work and shifts attorney's fees to the infringer. Without registration before infringement begins, you are limited to actual damages — meaning you must prove what you actually lost or what the infringer actually made, a difficult number to establish when NFT proceeds are sitting in a pseudonymous wallet. If you minted work during the boom and never registered it, register now. It protects against future infringement even if it doesn't help with past unauthorized mints.

What Happens When the Marketplace Shuts Down

When Nifty Gateway shut down in February 2025, it promised to migrate metadata and media to Arweave — but issued a significant carve-out: NFTs minted in 2021 or earlier that couldn't be updated would remain hosted on Nifty's own servers "in perpetuity." That phrase sounds reassuring until you ask who's paying the hosting bill after the company winds down.

The deeper problem is structural. Most NFTs don't store the actual artwork on-chain — the token holds only a pointer, a URL or content hash, that points to a file hosted somewhere else. If that somewhere else disappears, the token becomes a broken link to nothing. At the height of the boom, roughly 40% of NFTs relied on private marketplace servers rather than decentralized storage, putting hundreds of millions of dollars of digital art at direct risk the moment those platforms stopped operating. KnownOrigin's shutdown in July 2024 surfaced the same question immediately: would eBay, its acquirer, keep paying the IPFS pinning costs that kept the art accessible?

The practical answer for any artist who minted during 2020–2023 is to check now, before a shutdown forces your hand. Open your token on a blockchain explorer (Etherscan for Ethereum-based NFTs), find the tokenURI field, and read what it points to. A URL beginning with ipfs:// or containing an Arweave transaction ID is decentralized and will survive a marketplace closing. A URL beginning with https://api.{marketplace}.com/ is centralized — your art lives on their servers. If you're in the second category, migrate your metadata to Arweave or contact the platform about transfer options while it's still operational. Arweave charges a one-time fee for storage designed to last at least 200 years; IPFS is persistent only as long as someone is paying to pin the file.

The Tax Obligation That Didn't Disappear With the Hype

The NFT market collapsed. The tax bill did not. The IRS requires every taxpayer to report digital asset transactions — including NFT sales — on their annual return, treating NFTs as property. That means your 2021 and 2022 minting proceeds, every primary sale, and every royalty payout were taxable events whether or not you received a 1099, whether or not the platform you used still exists.

For artists who minted and sold NFTs as part of their creative practice, primary sale proceeds are ordinary income subject to self-employment tax — not the lower capital gains rate. Royalties you collected follow the same rule: taxable as ordinary income in the year received. The IRS has not issued specific guidance on NFT royalty income, but general property-income principles apply, and the default position is that income is income.

IRS Notice 2023-27 adds a wrinkle for secondary-market transactions. Under a "look-through analysis," if an NFT represents a collectible — a work of art qualifies — then the NFT is taxed as a collectible. Long-term capital gains on collectibles are capped at 28%, higher than the standard 15% or 20% rate most taxpayers expect. If you bought and later sold NFTs as a buyer-investor rather than the original creator, that 28% ceiling applies to any gain.

If you sold NFTs at a loss, document it now. Capital losses offset capital gains and reduce your overall tax liability — but only if you can substantiate them. That means records of what you paid in ETH (converted to USD at the time of the transaction), what you received, and the date of each event. Gas fees paid to execute transactions are deductible as part of your cost basis. Every sale, every royalty payout, every gas fee deserves a line in a spreadsheet. The platforms may be gone; your recordkeeping obligation is not.

Practical Steps for Artists with NFT Exposure

The legal questions that survived the bubble are not abstract — they each have a corresponding action. Here is where to start.

• Register your copyright. If you minted works that have not yet been registered with the U.S. Copyright Office, file now. Under 17 U.S.C. § 412, registration before infringement (or within three months of first publication) is a prerequisite to recovering statutory damages and attorney's fees. Without it, your only remedy is actual damages — which are often impossible to prove in NFT disputes.
• Audit your smart contracts. Pull the original mint agreement or platform terms and read what rights transferred to buyers. The USPTO/USCO Joint Report found that NFT mint agreements varied widely — some explicitly transferred commercial rights, others transferred nothing. Knowing which camp your sales fall into determines how far a buyer can go with your work.
• Verify your storage. Look up each NFT's tokenURI and confirm whether the underlying file is on IPFS, Arweave, or a marketplace server. If you sold on Nifty Gateway, check whether your specific NFTs were migrated to Arweave before the platform shut down — older pre-2021 NFTs may still be sitting on Nifty's servers. Get a local copy of every underlying file you still care about.
• Document your taxes. Reconstruct every NFT sale, royalty payment, and gas fee now, while blockchain records are still accessible. The IRS expects contemporaneous records for digital asset income, and marketplace transaction histories have a way of disappearing when platforms shut down.
• If unauthorized minting happened to you. The enforcement path has three steps: DMCA takedown notice to the platform, identification of the infringer, and a consultation with an IP attorney to assess your damages exposure based on your registration status. The sequence matters — platforms will not act without a proper DMCA notice, and registration status determines whether litigation is worth pursuing.

None of these steps require waiting for new law. The tools exist now. The only variable is whether your paperwork and registration are in order before the next dispute arises.