> For the complete documentation index, see [llms.txt](https://asigna.gitbook.io/asigna/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://asigna.gitbook.io/asigna/stacks-multisig/quickstart/vault-balance/nfts.md).

# NFTs

### What Are NFTs on Stacks?

NFTs (Non-Fungible Tokens) on **Stacks** bring unique, verifiable digital assets to Bitcoin — without compromising on decentralization. Built on **Clarity smart contracts**, Stacks NFTs are anchored to the security of Bitcoin while enabling expressive logic, royalties, and composability on Layer 1.5.

Unlike Bitcoin-native inscription methods (like Ordinals), **Stacks NFTs** live in a fully programmable environment with native support for ownership logic, marketplaces, metadata, and interoperability — all while settling on Bitcoin.

#### 🔧 How Stacks NFTs Work

Stacks NFTs are created through **Clarity smart contracts**, which define how tokens are minted, transferred, and managed. These contracts support robust standards (like SIP-009 for NFTs), allowing for advanced features such as:

* Royalties
* On-chain and off-chain metadata
* Creator verification
* Access control & gated content
* Multi-asset support (e.g., audio, images, files)

Each NFT transaction on Stacks is **settled on Bitcoin**, inheriting its immutability and finality, thanks to Stacks' unique **Proof of Transfer (PoX)** mechanism.

#### 💡 Key Features

* **Programmable NFTs**: Powered by Clarity smart contracts for full logic customization.
* **Royalties & rules**: Automate creator royalties, enforce ownership rights, or gate access with on-chain conditions.
* **Bitcoin finality**: All NFT activity is anchored to Bitcoin blocks for unmatched security.
* **Marketplace ready**: Compatible with platforms like Gamma, Byzantion, and others.
* **Low fees**: Compared to Ethereum or Bitcoin inscriptions, Stacks NFTs are more cost-efficient.

NFTs on Stacks represent a powerful blend of **Bitcoin-grade security** and **Ethereum-level expressiveness**, offering a fertile ground for builders who want true ownership, smart features, and deep integration with the future of Web3.