Who backs WBTC?

Who exactly backs Wrapped Bitcoin (WBTC)? Could you please elaborate on the entities or organizations that provide support or guarantee for this cryptocurrency? I'm particularly interested in understanding the trustworthiness and reliability of the backers, as well as their role in ensuring the stability and security of WBTC. Additionally, are there any regulatory frameworks or legal mechanisms that govern the backers' involvement with WBTC? Thank you for your clarification on this matter.