Bitcoin Gets Its First Native Rewards-Bearing Stablecoin

USDB, a regulated USD-backed stablecoin built directly on Bitcoin, has launched on Spark. USDB holders earn up to 6% back, paid daily in BTC, making it the first stablecoin on any Bitcoin layer to offer native rewards.

Brale, a U.S.-licensed financial institution, issues USDB with 1:1 backing by Treasury bills and cash equivalents. Trading is now available on Flashnet, Luminex, SatsTerminal, and Xverse, with Tether integration planned later in 2026.

Why This Matters

Over $250 billion in stablecoins exist across other blockchains, but this marks the first native to Bitcoin. Previous solutions required bridges or wrapped tokens, introducing custody risks. USDB operates differently: it settles in sub-seconds with zero transfer fees while maintaining user self-custody and Layer 1 exit capabilities.

The rewards model incentivizes accumulation of Bitcoin rather than depreciating dollars, funded through Flashnet protocol fees and distributed daily at midnight UTC.

Built on Spark

Spark's architecture enables native token issuance, instant settlement, zero transfer fees, and self-custody with unilateral Layer 1 exit options: capabilities previously unavailable on Bitcoin.

How to Get USDB

• Swap BTC for USDB on supported exchanges
• Hold 10+ tokens to earn rewards (3.5% base APY, up to 6% for active traders)
• Transfer without lockups or penalties
• Developers can integrate USDB through the Spark wallet SDK