B20 PriceB20

What is B20 (B20)?

This article covers B20 (CMC ID 8457), the Metapurse ERC-20 art-fractionalization token on Ethereum. It is not the same as the B20 token standard introduced by Base's Beryl upgrade, nor the unrelated B20 Protocol (B20PROTOCOL) tokens.

B20 is a token associated with Metapurse's mission to democratize access and ownership of highly sought-after artwork and accelerate the cultural Renaissance happening within the metaverse. B.20 is an NFT bundle fractionalized so that everyone can have ownership over the first large-scale public art project within the metaverse. It is important to note that this represents fractionalized ownership, not the assets themselves. These fractions are available as 10 million B.20 tokens, which can be referred to as the "keys" to this digital vault. The underlying bundle is The Beeple 20 Collection and the newly built VR museums it lives in, shared with the metaverse. The token is built on the Ethereum platform and had a start date of February 14, 2021. The total supply is 10 million B20 tokens.

Separately, B20 also refers to the Base ecosystem's native token standard, which is Base's own version of ERC-20. This standard ships with a built-in compliance toolkit including transfer policies, freeze-and-reissue controls, role-based access control, memos, and supply caps. It serves stablecoin issuers, real-world asset and equity issuers, and long-tail token creators. B20 tokens run as Rust precompiles, making them faster, cheaper, and closer to the chain itself. The B20 standard was activated on Base mainnet via the Beryl hard fork on June 25, 2026.

Key Specifications & Tokenomics

• Name: B20
• Ticker / Symbol: B20
• Blockchain / Platform: Ethereum platform
• Contract Address (Ethereum mainnet): 0xc4De189Abf94c57f396bD4c52ab13b954FebEfD8
• Token Standard: ERC-20
• Decimals: 18
• Contract Source: Verified on Etherscan (Solidity v0.7.5)
• Official Website: https://b20.whalestreet.xyz
• Start Date: 2021-02-14
• CMC Tags: Collectibles & NFTs
• Total Supply: 10,000,000 B20
• Max Supply: 10,000,000 B20
• Circulating Supply: 0 B20 (self-reported by project via CoinMarketCap)
• Explorers: etherscan.io
• Base Standard Library: v1.0.0 (Beryl interfaces)
• GitHub: https://github.com/base/base-std/blob/main/docs/B20/README.md

Who created B20?

B20 is associated with Metapurse, a project focused on democratizing access and ownership to highly sought-after artwork and accelerating the cultural Renaissance within the metaverse. The B.20 token represents an NFT bundle fractionalized to allow public ownership of a large-scale metaverse art project. B.20 is a Metapurse project; Metapurse's mission is to democratize access and ownership of highly sought-after artwork. The B20 native token standard on Base was developed by Base, which is described as the Coinbase-incubated Ethereum Layer 2. The B20 standard is documented in Base's official upgrade documentation (docs.base.org/upgrades/beryl/b20) and the base-std GitHub repository.

How does B20 work?

For the B.20 token, the mechanism involves fractionalizing an NFT bundle into 10 million B.20 tokens. These tokens function as fractions representing ownership shares of the underlying digital art vault, not the assets themselves. The fractions are available as 10 million B.20 tokens and can be referred to as the "keys" to this digital vault. The B.20 contract includes a UI multiplier (tracked via the UIMultiplierUpdated event); displayed token amounts are scaled by the active multiplier.

For the B20 native token standard on Base, tokens are implemented as Rust precompiles rather than EVM smart contracts, making them faster, cheaper, and more native to the chain. All B20s are deployed via the singleton IB20Factory precompile. B20 is a superset of ERC-20, meaning every ERC-20 call such as transfer, transferFrom, approve, balanceOf, allowance, and standard events behaves exactly as the standard specifies, so existing ERC-20 tooling and integrations work against B20 with no changes. B20 adds methods that ERC-20 does not include: memos, mint/burn, policy gating, granular pause, and ERC-2612 permit. The standard supports two variants: Asset with 6–18 decimals and features including rebase multiplier, onchain announcements, and batched issuance; and Stablecoin with 6 decimals fixed and a self-declared fiat currency code. B20 uses a role-based access control model extending OpenZeppelin AccessControl with roles including DEFAULT_ADMIN_ROLE, MINT_ROLE, BURN_ROLE, BURN_BLOCKED_ROLE, PAUSE_ROLE, UNPAUSE_ROLE, and METADATA_ROLE. A PolicyRegistry singleton precompile manages allowlists and blocklists, with B20 tokens referencing policies by uint64 ID.

What makes B20 unique and valuable?

B.20 represents fractionalized ownership of The Beeple 20 Collection and the VR museums it lives in, as described by the project. By breaking down an NFT bundle into 10 million tokens, it democratizes access to high-value digital artwork that would otherwise be inaccessible to most collectors.

The B20 native token standard on Base distinguishes itself through its architecture as a Rust precompile rather than an EVM smart contract, delivering faster and cheaper transactions. Its built-in compliance toolkit includes transfer policies, freeze-and-reissue controls, role-based access control, memos, and supply caps, making it suitable for regulated asset issuance. The standard's ability to serve stablecoin issuers, real-world asset and equity issuers, and long-tail token creators positions it as a versatile framework. Its ERC-20 compatibility ensures existing tooling works without changes, while its extended methods provide capabilities beyond the standard ERC-20. The admin renunciation feature allows tokens to permanently transition to an admin-less state, enhancing decentralization and security for token holders.

What is B20 used for?

The B.20 token is used to represent fractionalized ownership of an NFT bundle within the metaverse. Holders of B.20 tokens possess fractions that serve as keys to a digital vault containing highly sought-after artwork. This allows participants to have ownership over a large-scale public art project without needing to acquire the entire asset.

The B20 native token standard on Base is used for creating and managing tokens on the Base blockchain. It serves stablecoin issuers, real-world asset and equity issuers, and long-tail token creators. The standard supports two variants: Asset tokens with configurable decimals and features like rebase multiplier, onchain announcements, and batched issuance; and Stablecoin tokens with fixed decimals and a self-declared fiat currency code. B20 tokens can be used for transfers, approvals, minting, burning, policy-gated operations, and granular pause functionality. The memo feature allows for attaching additional data to transactions, which is useful for compliance and record-keeping purposes.

How Is the B20 ecosystem developing?

Base introduced the B20 native token standard through the Beryl upgrade, which activated on mainnet on June 25, 2026 and also reduced withdrawal delays to 5 days. A third-party dashboard tracks Base B20 tokens; market data changes continuously and should be checked at the source. According to Yahoo Finance, B.20 is listed on 8 markets, though recent 24-hour trading volume has been effectively zero.

How to mine B20?

B20 on Ethereum is not a mineable cryptocurrency through traditional proof-of-work mining. B.20 is a fixed-supply ERC-20 token with 10,000,000 units created at inception; it has no mining or staking mechanism. The contract includes a UI multiplier that scales displayed token amounts. The B20 native token standard on Base is a protocol-level token standard rather than a tradable coin, and it is not mined. Instead, B20 tokens on Base are created through the singleton IB20Factory precompile, with minting gated by the MINT_ROLE. Token creators can deploy B20 tokens by verifying that the Activation Registry is enabled before attempting to deploy. The standard supports mint and mintWithMemo functions for authorized addresses holding the MINT_ROLE.

How to keep your B20 Coin safe?

To keep your B20 tokens safe, use hardware wallets or reputable software wallets that support Ethereum and Base network assets. Always verify contract addresses before interacting with any token. For the B.20 token on Ethereum, the contract address should be confirmed through official sources. For B20 tokens on Base, verify the contract address through official sources. Store private keys securely and never share them with anyone. Be cautious of phishing attempts and fake tokens that mimic legitimate projects. When interacting with B20 tokens on Base, understand the role-based access control model, as certain roles like DEFAULT_ADMIN_ROLE gate critical operations including role grants, policy updates, and supply-cap changes. Tokens with an active admin retain the ability to modify policies and roles, so review the token's admin status before acquiring significant holdings. For long-term storage, consider using cold storage solutions and keep your wallet software updated to the latest version. Always double-check transaction details before confirming any transfer or approval.