Stablecoin AtlasBase — Coinbase (sole sequencer operator at launch; decentralization on roadmap)
May 2026 · Vol. III · Chains
Chain profile Blockchain-native

Base.

Abstract. Coinbase (sole sequencer operator at launch; decentralization on roadmap)

Facts

Chain identity at a glance.

Type
L2-optimistic
Parent chain
ethereum
Native settlement
ETH · USDC
Account model
EOA + ERC-4337 (Coinbase Smart Wallet is the canonical Coinbase-operated AA surface; passkey-based onboarding)
Vendor stack · L5 → L1

The 5-layer Stable Stack.

Each row is one named vendor slot from the chain's vendorStack. Solid markers are code-enforced (the chain blocks or signs); dashed markers are policy-enforced (the chain flags, humans or systems act on the signal).

L5 → L1 — application down to network
L5 · Application
wallet
Coinbase Wallet · Coinbase Smart Wallet (ERC-4337 account abstraction — passkey-based onboarding)
C1C14 ◇ policy-enforced
paymaster
Coinbase Paymaster (gas-sponsorship primitive for Coinbase Smart Wallet flows · ERC-4337 paymaster contract)
◆ code-enforced
attestation
Coinbase Verifications (Ethereum Attestation Service-backed attestation product binding Coinbase-verified identity attributes — country of residence, accredited-investor status, etc. — to addresses)
C1C14 ◆ code-enforced
tokenized-securities-ats
Securitize Markets ATS (SEC-registered ATS)
C13C8 ◇ policy-enforced
tokenized-rwa-issuer
BlackRock BUIDL · other Securitize-issued RWAs (Base deployments via multichain expansion — ACRED was Ethereum-mainnet and Base availability is NOT independently confirmed)
C13C14 ◇ policy-enforced
L4 · Account
account
EOA + ERC-4337 Smart Account (Coinbase Smart Wallet is the canonical Coinbase-operated AA surface)
C1 ◆ code-enforced
custody
Coinbase Custody Trust Company, LLC (New York limited-purpose trust company under NYDFS) · Coinbase Prime brokerage (institutional custody + execution surface) · third-party qualified custodians per integrator (Anchorage · BitGo · Fireblocks)
C1 ◇ policy-enforced
transfer-agent
Securitize LLC (SEC-registered transfer agent; runs Reg D 506(c)(2)(ii) accredited-investor verification workflow; transfer-agent function is off-chain, identical on Base and Ethereum)
C1C11 ◇ policy-enforced
L3 · Execution
swap
Uniswap v4 · Aerodrome (Base-native AMM derived from Velodrome) · BaseSwap
C13C16 ◆ code-enforced
sanctions-oracle
Chainalysis OFAC Oracle (on-chain SDN-list enforcement primitive · code-enforced at the contract layer for opt-in callers)
C2 ◆ code-enforced
bridge
Circle CCTP v2 (canonical USDC burn-and-mint cross-chain transport between Base and Ethereum / other CCTP-supported chains) · Base Bridge (OP Stack canonical L1 ↔ L2 bridge with 7-day challenge window · L1-escape-hatch via force-inclusion)
C7 ◆ code-enforced
transfer-restriction
Securitize DS Protocol (on-chain transfer-restriction smart-contract framework enforcing eligible-investor whitelisting — ACRED is Ethereum-only; BUIDL multi-chain expansion to Base reported in public reporting but primary-source confirmation pending)
C1C13C16 ◆ code-enforced
L2 · Consensus
sequencer
Coinbase Sequencer (Coinbase-operated at launch · decentralization stated as roadmap commitment · OP Stack-derived sequencing semantics)
C10 ◆ code-enforced
L1 · Network
da
Ethereum (via OP Stack) — Base posts batch data to Ethereum via EIP-4844 blob DA for ordering anchor; state-transition security inherits from Ethereum L1 subject to OP Stack fault-proof activation status
◆ code-enforced
Fig. 1 — Vendor slot per layer; solid border = code-enforced, dashed border = policy-enforced.
Bridges supported

Cross-chain transport surface.

  • CCTP v2 (canonical USDC burn-and-mint)
  • Base Bridge (OP Stack canonical L1 ↔ L2 bridge with 7-day challenge window)
  • LayerZero
  • Across (intent-based settlement)
Related paths

Paths that route through Base.

Compliance paths whose settlementChains include base or whose steps execute on this chain.

Agentic Payments x402 HTTP Purchase Agentic Payments ACK-Pay Agent Settlement Agentic Payments AP2 Agent-to-Agent Agentic Payments Stripe Agentic Toolkit Agentic Payments Circle Agentic Payment Channels Retail Payments Single-Chain USDC Transfer Retail Payments Cross-Chain CCTP Transfer Retail Payments Visa+Stablecoin Card Payment Retail Payments P2P Wallet Transfer Retail Payments Merchant POS Stablecoin Accept Securities Trading Perpetual Futures (CEX) Securities Trading RWA Cross-Chain Settlement Securities Trading Tokenized ABS (Receivables) Securities Trading Tokenized CLO (Leveraged Loans) Securities Trading Tokenized MBS (Private-Label RMBS) Clearing & Settlement Chainlink CRE Cross-Chain DvP Clearing & Settlement Cross-Chain Bridge Settlement Issuance & Redemption Canadian Bill C-15 Issuer Compliance Journey Issuance & Redemption Tokenized MMF Position Maintenance DeFi Protocols Uniswap V4 AMM Swap DeFi Protocols Aave V3 Lending/Borrowing
Source

Where the truth lives.

compliance/registries/chains/base.ts — full discipline header, sources, and per-field VERIFY inventory live in the chain-profile source file. See the path resolver to see this chain in a resolved compliance journey.

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