Cowrie Research

hoseki-primary-sources-2026-04-28

4 min read

Hoseki primary-source snapshot

Fetched: 2026-04-28 UTC

1) Official homepage

Source: https://www.hoseki.app/

Selected excerpts from the official site:

Turn your Bitcoin into a financial asset by proving ownership while maintaining custody.

Prove — Generate cryptographically-verified statements for your Bitcoin and digital assets. No private keys ever shared.

Asset Link — White-label Embed branded verification flows directly in your platform. Your look, our infrastructure.

Verify Portal — Send verification requests by email — like DocuSign for crypto. No integration needed.

Additional signals from the source:

  • The homepage shows Hoseki spanning both consumer and business verification workflows.
  • The product taxonomy is unusually revealing: Prove, Asset Link, Verify Portal, API, and a linked banking-adjacent product surface.
  • The custody-preserving language suggests the core value proposition is evidence of ownership, not trading, custody, or portfolio management.

2) API documentation

Source: https://docs.hoseki.app/

Selected excerpts from the official docs:

Welcome to Hoseki’s API documentation. These docs are designed to help developers seamlessly integrate Hoseki’s capabilities into their applications, making it easy to verify and manage Bitcoin holdings across the two primary ownership methods: self-custody and exchanges.

The Verify API allows users to securely connect self-custodial wallets, view real-time balances, and generate verified ownership statements.

Unlike standard wallet integrations, Verify goes a step further—it cryptographically proves ownership of each connected wallet, ensuring your users truly control the Bitcoin they’ve linked.

For assets held on exchanges, Hoseki Connect provides a robust integration layer across a growing number of platforms. It delivers a unified portfolio view by consolidating exchange data—without the overhead of managing multiple APIs.

Additional signals from the source:

  • The docs clarify that Hoseki is not limited to self-custody proofs; it also normalizes exchange-linked asset data.
  • The distinction between Verify and Connect is the clearest architecture clue in the public materials.
  • The docs make Hoseki look like embedded verification infrastructure for third-party platforms, not merely a direct-to-consumer reporting tool.

3) Verify product page

Source: https://www.hoseki.app/verify

Selected excerpts from the official site:

Client Bitcoin Verification, Solved

Real-time proof of Bitcoin ownership with the click of a button. Fully customizable and built for your needs.

Additional signals from the source:

  • The Verify page is explicitly business-facing even though the homepage also supports individual holders.
  • “Fully customizable” reinforces the white-label / embedded-infrastructure framing.
  • The page suggests real-time operational verification, not just static report generation.

4) Asset Link product page

Source: https://www.hoseki.app/asset-link

Selected excerpts from the official site:

A white-label integration that replaces screenshots and PDFs with verified proof of digital asset ownership.

Additional signals from the source:

  • This is one of the clearest descriptions of the practical use case: replace informal evidence with reusable cryptographic verification.
  • The product appears aimed at lenders, platforms, compliance workflows, and other counterparties that currently rely on brittle document collection.
  • The term “white-label integration” supports categorizing Hoseki as verification-control-plane infrastructure.

5) Public proof-of-reserves board

Source: https://www.hoseki.app/proof-of-reserves

Selected excerpts/signals from the official site:

Bitcoin Holding Verification

Total Verified Bitcoin

Total Reported Bitcoin

Custodian

On-Chain

Public

Additional signals from the source:

  • The board compares verified and reported Bitcoin holdings for public entities such as Metaplanet and several ETFs.
  • Some entities are shown as verified while others remain unverified, which makes this more than a generic marketing claim page.
  • This surface indicates Hoseki is also building a public monitoring and attestation layer around Bitcoin reserve disclosures.

6) Help center

Source: https://help.hoseki.app/

Selected excerpts/signals from the official help center:

FAQs — Start here—answers about how Hoseki works.

Additional signals from the source:

  • The public help center is lightweight in this pass, but it confirms a maintained support/documentation surface beyond the marketing site.
  • Even when the docs do the heavier lifting, the help center supports the reading that Hoseki is an operational product with customer workflows.

Notes

  • Hoseki appears best cataloged as Bitcoin ownership-verification infrastructure / proof-of-reserves monitoring / asset-verification API / white-label verification control plane.
  • No canonical standalone whitepaper or litepaper surfaced in this pass.
  • The strongest current architecture clue is the split between self-custody verification, exchange-held asset aggregation, white-label request flows, and a public reserve-verification board.
  • The clearest classification clue is that the company repeatedly frames itself as replacing screenshots, PDFs, and unauditable claims with verifiable digital-asset ownership evidence.

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