Hoseki

Hoseki is a Bitcoin asset attestation service that helps holders generate cryptographically verifiable statements of ownership without moving funds or sharing private keys. Its core business revolves around three products: Prove, which lets individuals connect hardware wallets and download bank-grade proof-of-funds statements; Asset Link, a white-label verification flow for businesses; and Verify Portal, an email-based verification request tool similar to DocuSign for crypto. The company also maintains a public Proof of Reserves dashboard showing verified Bitcoin holdings.

The core value proposition is solving the trust gap in Bitcoin's self-custody model. While Bitcoin gives users full control, this same feature makes it difficult to prove ownership to third parties like lenders or auditors. Hoseki addresses this by using Bitcoin's native cryptographic properties to create verifiable attestations, enabling use cases such as underwriting, credit applications, and financial disclosures without compromising custody or privacy. Users can selectively share data, choose which wallets to include, and revoke access at any time.

In the past six months, Hoseki has focused on expanding accessibility. In January 2026, the company announced that Prove became available to all users, marking a shift from limited rollout to general availability. The blog also indicated ongoing work on institutional improvements and deeper integration of digital assets into everyday finance. However, specific developments between March and September 2026 were not detailed in available sources. One notable industry-wide challenge is the lack of standardized verification frameworks, which may affect adoption across different financial sectors.