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This KuCoin Learn article explains SRC-20 tokens and Bitcoin Stamps as a new approach to creating fungible digital assets on the Bitcoin blockchain. SRC-20 tokens leverage the Bitcoin Stamps protocol to embed immutable metadata into UTXOs, making token parameters and associated data permanent and resistant to pruning. The guide compares SRC-20 with existing alternatives like BRC-20 and Bitcoin Ordinals, outlines potential use cases such as digital collectibles, DeFi tokenization, and community tokens, and highlights practical steps for minting and interacting with SRC-20 tokens via platforms and compatible wallets. It also discusses advantages—security, permanence, and expanded utility—and challenges including costs, scalability, and limited integration.

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Introduction

Overview

SRC-20 tokens and Bitcoin Stamps represent an emerging layer of functionality for the Bitcoin blockchain that goes beyond simple payments. Bitcoin Stamps is a protocol that embeds arbitrary data into Bitcoin’s UTXOs, creating a permanent, non-prunable record on-chain. Building on this foundation, SRC-20 tokens are a fungible token standard that stores token metadata—name, supply, and additional attributes—directly in those UTXOs, enabling minting, transfer, and trading of tokens secured by Bitcoin’s network.

Core Capabilities

  1. Immutable On-Chain Storage: SRC-20 tokens store metadata in UTXOs using the Bitcoin Stamps protocol, ensuring data permanence and resistance to pruning.

  2. Fungible Token Operations: SRC-20 provides mechanisms to create, mint, and transfer fungible tokens that coexist alongside BTC and leverage Bitcoin’s security model.

  3. Compatibility with Tools and Wallets: Platforms like Stampscan and OpenStamp, along with wallets such as Leather Wallet and Unisat, enable users to mint, view, and hold SRC-20 tokens.

  4. Flexible Data Capacity: Because data is written into UTXOs, larger metadata payloads (images, extended metadata) are possible, though this affects fees.

  5. Native Bitcoin Fee Model: Transactions that mint or move SRC-20 tokens pay fees in BTC, integrating token activity into native Bitcoin economics.

How They Work

SRC-20 tokens are minted by encoding a token’s parameters into a Bitcoin transaction using a Stamp marker (for example, a STAMP:base64 string). That transaction is included in a block and its UTXO entries persist on-chain. Unlike witness-based methods that store token data in prunable witness sections, this UTXO-based approach ensures token metadata is preserved for as long as the Bitcoin ledger exists. Tools such as Stampscan/OpenStamp parse Stamp-encoded transactions to present token registries and trading interfaces, while compatible wallets allow end users to hold and move tokens.

Potential Use Cases

  • Digital Collectibles and NFTs: Artists can mint collections that are permanently anchored to Bitcoin, providing immutable provenance.

  • DeFi and Tokenized Assets: SRC-20 can represent stablecoins, governance tokens, or other tokenized real-world assets used in lending, staking, or trading protocols.

  • Community and Reward Tokens: Projects can issue tokens to reward participation, enable governance, or power access and discounts within ecosystems.

Benefits

  • Security and Permanence: Data in UTXOs benefits from Bitcoin’s decentralization, immutability, and high-assurance security.

  • Expanded Bitcoin Utility: SRC-20 opens Bitcoin to tokenization use cases previously dominated by smart-contract platforms, creating new financial and creative applications.

  • Rich Metadata Support: The ability to store larger payloads allows high-resolution media and detailed token descriptors to be embedded on-chain.

Challenges and Limitations

  • Higher Transaction Costs: Larger on-chain payloads increase fees, making small or frequent token operations expensive.

  • Scalability Concerns: Bitcoin’s block capacity and throughput constrain large-scale adoption and may cause congestion.

  • Limited Ecosystem Integration: Wallet and exchange support remains nascent compared with alternatives like BRC-20, limiting liquidity and usability.

How to Mint and Interact
  1. Choose a supported marketplace (e.g., Stampscan, OpenStamp).
  2. Set up a compatible wallet (e.g., Leather Wallet, Unisat) and fund it with BTC.
  3. Define token parameters and encode them as a Stamp transaction.
  4. Broadcast the transaction and confirm inclusion on the Bitcoin blockchain.
  5. Use the wallet or platform to view, trade, or transfer tokens.
Why Consider SRC-20 and Bitcoin Stamps

For creators, developers, and communities seeking the strongest assurances of permanence and Bitcoin-level security, SRC-20 tokens present a compelling option. They align token data durability with Bitcoin’s design principles and enable new kinds of digital ownership and financial instruments. However, decision-makers should weigh the cost and integration trade-offs against these benefits.

Future Outlook

Wider adoption will hinge on better tooling, wallet and exchange support, and improvements in layer-2 or protocol-level efficiency to manage fees and scalability. If the ecosystem matures, SRC-20 and Bitcoin Stamps could substantially expand Bitcoin’s role as a platform for tokenized assets, digital art, and community-driven economic models.

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  • Publisher
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  • Websitewww.kucoin.com
  • Published date2026/01/14

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