Merlin Chain
Bitcoin L2 with EVM compatibility. Held the largest TVL among Bitcoin L2s during 2024; that is no longer true. Two metrics, both DefiLlama, both 15 September 2026:
| Metric | Value | Peak |
|---|---|---|
| Merlin chain DeFi TVL | ~$9.3M | ~$529M (5 May 2024) |
| Merlin's Seal bridge vault (BTC locked) | ~$410M | ~$2.65B (29 Mar 2024) |
On the same date Stacks ($79.3M) and Rootstock ($79.0M) each hold
roughly 8x Merlin's chain DeFi TVL, and BOB (~$10.2M) is ahead of it
too. Bridge-locked BTC and value actually deployed in Merlin DeFi are
not the same number and have diverged by ~40x. DefiLlama tracked 27
protocols on Merlin on that date, 9 of them holding more than $10k.
Re-check before quoting: https://defillama.com/chain/Merlin for chain
DeFi TVL, https://defillama.com/protocol/merlins-seal for the vault.
Architecture
- ZK rollup posting state commitments to Bitcoin.
- EVM execution.
- Federation peg for BTC bridging.
- Native token: MERL.
Ecosystem
- DeFi: lending, AMMs, stable coins.
- Inscriptions / Ordinals integrations.
- Cross-chain bridges to Ethereum L2s.
Position
Was the "leading TVL" Bitcoin L2 through 2024, on TVL that was partly inflated by yield-farming incentives; when the incentives tapered the TVL left with them. Chain DeFi TVL slid from ~$169M (1 Jan 2025) to ~$9.3M (15 September 2026). The contraction is sector-wide, not Merlin-specific: over the same window Bitlayer went ~$361M -> ~$0.46M and BSquared ~$89M -> ~$2.6M (DefiLlama, same dates). Mainnet is still live and producing blocks — ~4.05s average block time, ~850 transactions logged by 18:49 UTC on 15 September 2026 per the Blockscout explorer — but at a fraction of its 2024 activity. The project continues to ship: merlinchain.io was advertising a 45% APR MERL staking program on 15 September 2026. Critique: heavy reliance on federation for now, slower path to trust-minimization.
Use cases
- BTC yield products.
- EVM dApps with Bitcoin-themed user base.
- Cross-chain liquidity hubs.
Limitations
- Federation trust — still the dominant risk: the Merlin's Seal vault held ~$410M of BTC on 15 September 2026, orders of magnitude more than the chain's own DeFi TVL, and the Bitcoin fraud-proof module has not replaced it.
- TVL was inflated by mercenary yield-farming users, and the 2025-2026 drawdown is what that unwinding looks like. Treat any TVL or dApp-count figure in this skill as a dated snapshot, not a fact.
- Thin on-chain liquidity — 9 protocols above $10k TVL on 15 September 2026 (DefiLlama). Expect slippage and shallow markets.
- Centralization concerns common to early L2s.