Open Standard · Consumer Data Trust · Independent

Your bathroom
knows more than
you think

BHOS is the independent certification standard that ensures the insights it generates belong to you — held in trust, never for sale.

What this means for you For technology companies
TOTO Endorsed
Chorus Foundation
6 Certification Domains
Consumer Data Trust
Independent Governance
For You

Health intelligence
you can actually trust

"The most valuable health data you'll ever generate happens every single day — without a doctor, without a device, without changing your routine."

🔬
Insights backed by real science
Every technology carrying the BHOS mark has been validated in a real-world living lab — not just lab conditions. Clinical advisors review the evidence. If it doesn't hold up, it doesn't get certified.
🔒
Your data stays yours
The Chorus Foundation holds your health data in trust — on your behalf, not for sale. View it, export it, or delete it at any time. No advertiser targeting. No platform monetisation. Written into our founding charter.
✅
A mark you can look for
BHOS Certified is issued by an independent body — not by the company selling you the product. It means rigorous third-party validation across data privacy, clinical validity, and consumer experience.
🏥
A path to real healthcare
BHOS builds from wellness insights toward clinically validated signals that can inform your doctor or preventive health plan. The bathroom becomes an ambient health check — no extra effort required.
The Standard

Six domains.
One mark.

Every BHOS certification covers the same six domains. All six must be met. There are no shortcuts and no pay-to-pass pathways.

01
Data Sovereignty
The technology retains full ownership of its data pipeline. No third-party interpretation without explicit agreement. BHOS does not aggregate or route partner data.
✓ Required
02
Clinical Validation
Accuracy demonstrated in a real-world setting with a defined population, methodology, and outcome criteria. Claims are evidence-backed, not asserted.
✓ Required
03
Regulatory Posture
Compliance with applicable frameworks — HIPAA, GDPR, Japanese health data law — confirmed. A defined regulatory pathway documented and on track.
✓ Required
04
Privacy Architecture
A documented consent model. User data handled to a published standard. Audit trail maintained and available on request.
✓ Required
05
Integration Compatibility
The technology connects to the BHOS environment without data quality degradation. API or federation pathway scoped and verified.
✓ Required
06
Consumer Experience
User interaction quality assessed against defined criteria. Designed to protect both end users and the endorsing authority's brand.
✓ Required
Data Stewardship

We hold your data
in trust. Not for profit.

"The data you generate in your bathroom is among the most personal that exists. It should belong to you — permanently, legally, with no exceptions. The Chorus Foundation's charter makes this binding. It is not a policy. It is a legal structure that cannot be sold or overridden."

🏛️
Independent governance
Governed by consumer advocates, clinical advisors, and legal experts. No commercial representative holds a voting seat on data decisions.
🚫
Cannot be sold
A non-profit charter cannot be acquired by a private equity firm or strategic buyer. The data stewardship obligation cannot be transferred to a new commercial owner.
✋
You stay in control
View your data. Export it. Delete it. Withdraw consent from any specific use at any time. Nothing happens without your knowledge.
🔬
Research with consent
Anonymised insights inform clinical research — but only with your active consent for each specific use. You are a participant, not a product.
🛡️
Vendor IP stays separate
The foundation holds consumer-generated health outputs — not vendor algorithms. Every certified partner keeps full ownership of their technology stack.
📋
Annual transparency report
Every year: a full public account of what data was held, who accessed it, for what purpose, and with what outcome. Independently reviewed.
Why Structure Matters

Designed to resist
enshittification

"Enshittification is not a moral failure. It is a structural one. The question to ask of any platform is not 'do they promise to behave well?' — it is 'what happens to the incentive structure when they stop wanting to?'"
Threshold · Design Rationale · 2026

Cory Doctorow coined "enshittification" to describe how platforms decay: good to users, then abusing users for businesses, then abusing businesses for shareholders. Every health data platform of the last decade has followed some version of this arc. BHOS is designed so that arc is legally impossible to follow. The Chorus Foundation has no shareholders to satisfy. The standard it holds can't be degraded by commercial pressure. The data trust it stewards can't be monetised. These are structural constraints written into the founding documents.

01
No shareholders
No equity holders. No one to pressure the board into monetising your data to hit a return target. The legal structure removes the motive before it can form.
02
Standard can't be captured
The BHOS mark is held by the foundation — not TOTO, not any vendor, not any investor. No one can lower the bar for a partner or raise it to exclude a competitor.
03
Can't be acquired
A non-profit charter can't be sold. The most common platform failure mode — "gets acquired and the terms quietly change" — is legally blocked.
04
Exit always possible
Lock-in is what enables enshittification. Genuine portability and deletion rights mean the platform cannot trap you. You can always leave with your data.
05
Incentives aligned
Foundation revenue comes from certification fees — which grow as the mark becomes more credible. Credibility depends on independence. There's no financial reason to compromise.
06
Everything auditable
Annual transparency reports, publicly auditable governance, independent board reviews. Enshittification hides in opacity — it has nowhere to hide here.
For Technology Companies

The certification
pathway

01
POC intake
Your technology enters the BHOS living lab programme. Chorus structures the pilot against the PEIRO evidence standard — Population, Environment, Intervention, Response, Outcomes — so data is IRB-ready from day one.
Application open year-round
02
Independent assessment
Chorus assesses across six certification domains. You are not assessed by a competitor, a potential acquirer, or anyone with a commercial stake in the outcome.
3–6 months typical
03
Evidence package
Chorus produces a certification recommendation report — the evidence base the endorsing authority uses to decide. This is also the Tier B deep diligence output that opens the TOTO commercial pathway.
Publishable with your consent
04
Certification issued
The endorsing anchor partner issues the BHOS mark. Protected, dated, versioned. Annual membership fee supports foundation operations.
Tier A: market credibility · Tier B: commercial pathway
05
Commercial pathway
Certified companies enter the TOTO commercial partnership pipeline. The Threshold Fund uses BHOS certification as its primary investment quality filter. Certification is the on-ramp to both.
Fund + TOTO access
Ready to apply?
Start the BHOS certification process
We accept applications from companies across all BHOS signal categories — urinary health, gut analysis, acoustic diagnostics, UTI detection, metabolic monitoring, and more. First conversation is exploratory and confidential.
Begin your application →
6Domains
2Certification tiers
1Mark
Living Lab Network

Real environments.
Real evidence.

BHOS certification happens in accredited living lab sites — real-world settings with real users under defined research protocols. Lab results alone don't count.

● Live
Bay Area Senior Living
Multi-site pilot across San Francisco Bay Area aged care communities testing acoustic urinary health monitoring.
Acoustic / urinary health
◐ Planning
Independent Living Communities
Extending from assisted living to home-adjacent settings with active older adults.
Urinary · GLP-1
◐ Planning
Academic Health Centre
University-affiliated research environment with IRB infrastructure enabling peer-reviewed publication.
Multi-signal research
◐ Planning
Japan — TOTO Home Market
Pilot infrastructure under development with TOTO's Japanese distribution network. First non-US living lab site.
Gut health · Urinary
◐ Planning
Specialist Care Setting
Disease-specific monitoring in a clinical context — IBD, BPH, or metabolic conditions. Enables regulated health claims.
Clinical / regulated
○ Open
Become a Living Lab
Aged care operators, health systems, and research institutions can apply for accreditation as a BHOS living lab site.
Apply via Chorus Foundation
Who Holds the Standard

The Chorus Foundation

The Bathroom Health OS is owned and operated by the Chorus Foundation — an independent non-profit whose sole purpose is to maintain the integrity of the BHOS certification standard and steward consumer health data on behalf of the people who generate it.

The foundation cannot be acquired. It has no shareholders. Its board includes consumer advocates, independent clinical advisors, and legal experts — no commercial representatives hold voting seats on data governance decisions. This independence is not a policy position. It is a legal structure.

BHOS is the standard. Chorus is the body that holds it. TOTO is the founding anchor endorser — bringing hardware distribution and brand trust. But the standard itself belongs to the foundation, permanently, under a charter that cannot be overridden by any commercial interest.

Operating Entity
Chorus Foundation
Non-profit · Independent governance · Consumer-first charter
  • Owns and maintains the BHOS certification standard and mark
  • Holds consumer health data in trust — not for sale, not for extraction
  • Accredits living labs globally and runs independent assessments
  • Commissions deep research — clinical validation, consumer behaviour, IRB protocols
  • Engages regulators on the ecosystem's behalf — FDA, PMDA, insurers
  • Funded by certification fees, living lab membership, and research grants
Threshold Fund is the aligned investment vehicle operating downstream — investing in BHOS-certified companies under license from Chorus. The fund is separate and independent; the foundation's governance always takes precedence.
Get Involved

Where do you fit?

For Technology Companies
Apply for BHOS Certification
If you're building bathroom-based health technology — acoustic monitoring, gut health analysis, UTI detection, metabolic signals, or anything adjacent — BHOS certification is the pathway to TOTO partnership, institutional credibility, and the Threshold Fund investment pipeline.
Apply now →
For Consumers & Advocates
Join the Data Trust
Interested in contributing to the evidence base for bathroom health intelligence — on your terms, with full data control? Join the Chorus consumer research network. Your participation shapes the research. Your data stays yours.
Register interest →
Bathroom Health OS
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