Legal Document · ProofChain

Terms of Service

These terms govern your use of the ProofChain platform — verifiable AI agent compliance, on-chain HXMP audit trails, and KYA seals. By using ProofChain, you agree to be bound by them.

Effective Date: February 1, 2026  ·  Version: 1.0  ·  Jurisdiction: Minnesota, USA
Contents — 40 Sections
§ 01

Agreement to These Terms

These Terms of Service ("Terms") form a legally binding agreement between you ("you," "your," or "Client") and ProofChain ("ProofChain," "we," "us," or "our"), governing your access to and use of the ProofChain platform, website located at https://proofchain.us, its subdomains, dashboards, APIs, verification services, and all related products (collectively, the "Platform").

By creating an account, purchasing any product, accessing the dashboard, registering an agent, calling any API endpoint, or otherwise using the Platform, you acknowledge that you have read, understood, and agree to be bound by these Terms. If you do not agree, do not use the Platform.

You represent that you are at least 18 years old and have the legal capacity to enter into this agreement. If you are accepting these Terms on behalf of a company, organization, or other legal entity, you represent that you have the authority to bind that entity.

§ 02

Definitions

Capitalized terms used throughout these Terms have the following meanings:

§ 03

Eligibility & Account Responsibility

You must be at least 18 years old and capable of forming a binding contract to use the Platform. If you use the Platform on behalf of an organization, you confirm that you are authorized to bind that organization to these Terms.

You are responsible for maintaining the confidentiality of your account credentials, your AgentID wallet keys, and any API keys issued to you. You are fully responsible for all activity that occurs under your account, whether authorized by you or not, except to the extent caused by our failure to safeguard our own systems.

You agree to provide accurate, current, and complete information during registration and to keep it updated. ProofChain may suspend or terminate accounts that provide false information or that we reasonably believe have been compromised.

§ 04

The Service: Verifiable AI Agent Compliance

ProofChain provides a compliance and verification platform for AI agents. The Platform enables you to register Agents, generate verifiable compliance reports, issue and display KYA seals, and maintain on-chain audit trails of Agent behavior and provenance.

Core capabilities of the Platform include:

ProofChain provides the Platform "as is" and does not guarantee that any particular Agent, report, or seal will satisfy the requirements of any third party, regulator, exchange, or counterparty. Verification reflects information available to ProofChain at the time of issuance and may change.

§ 05

On-Chain HXMP Audit Trails

ProofChain records compliance-relevant events in a structured format defined by the Human/Agent Exchange Message Protocol (HXMP). Each event is hashed and anchored to a public blockchain, creating a tamper-evident, chronological record of an Agent's activity.

You acknowledge and agree that:

ProofChain may charge fees for high-volume audit anchoring as described on the Platform or in an applicable order, and may rate-limit anchoring to protect network stability.

§ 06

KYA Seals & Verification

"Know Your Agent" (KYA) seals are verifiable credentials issued by ProofChain that attest to an Agent's verified identity, provenance, and compliance posture at the time of issuance. Seals are displayed on the Platform, in the Agent registry, and via public verification endpoints.

You agree that:

§ 07

Account Registration & Your AgentID Wallet

To use most Platform features, you must register an account and provide an AgentID wallet address. The AgentID wallet is the on-chain identity under which your Agents are registered and their audit trails are anchored.

§ 08

API Keys & Credentials

Certain Platform features — including Pro endpoints, scheduled reports, and unlimited requests — require an API key. API keys are issued to your account and authenticate your requests.

§ 09

Fees, Currency & Payments

ProofChain products are priced in United States Dollars (USD). All payments are processed securely through Stripe (or an equivalent payment processor we designate). The following products and pricing are in effect as of the Effective Date:

ProductPricingBilling
Agent Fix Package$49One-time
KYA Shield$99/moMonthly subscription
KYA Vault (Lifetime)$490One-time, lifetime license
B2B Agency Setup$3,500One-time, per engagement
B2B Agency Retainer$1,500/moMonthly retainer

Prices are subject to change. Changes to subscription pricing take effect at the start of the next billing cycle after notice. One-time pricing is honored for the purchase in progress at the time of checkout.

§ 10

Agent Fix Package — One-Time $49

The Agent Fix Package is a one-time, fixed-fee service for $49 USD. Under this package, ProofChain performs a defined compliance fix or configuration remediation on a single Agent, as described on the Platform at the time of purchase.

§ 11

KYA Shield — $99/Month Subscription

KYA Shield is a monthly subscription for $99 USD per month, billed in advance each billing cycle until cancelled. KYA Shield includes ongoing compliance monitoring, periodic re-verification, seal maintenance, and related features described on the Platform.

§ 12

KYA Vault — $490 Lifetime License

KYA Vault is a one-time purchase of $490 USD granting a lifetime license to the Vault features described on the Platform — including archival audit storage, long-term seal retention, and associated Vault functionality, as then offered.

§ 13

B2B Agency Setup — $3,500 One-Time

The B2B Agency Setup is a one-time engagement of $3,500 USD for agencies or organizations deploying ProofChain across multiple Agents or client portfolios, as described at checkout or in a written SOW.

§ 14

B2B Agency Retainer — $1,500/Month

The B2B Agency Retainer is a monthly engagement of $1,500 USD per month providing ongoing compliance operations, monitoring, seal management, and priority support for your agency's Agent portfolio.

§ 15

Invoicing, Taxes & Late Payment

All fees are stated and payable in USD. Payment is due at checkout for one-time purchases and in advance for subscription and retainer billing, unless a SOW states otherwise.

§ 16

Subscriptions, Renewals & Cancellation

Subscription and retainer products (KYA Shield, B2B Agency Retainer) renew automatically for successive billing periods at the then-current rate until cancelled.

§ 17

Refund Policy — 7-Day Money-Back for Pro

7-Day Guarantee: If you are not satisfied with your ProofChain Pro purchase (including the Agent Fix Package and ProofChain Pro subscription), email support@proofchain.us within 7 days of purchase and we will refund your payment in full — no questions asked.

§ 18

Acceptable Use

You agree to use the Platform only for lawful purposes and in accordance with these Terms. You may not use the Platform to:

§ 19

Prohibited Activities

Without limiting § 18, the following activities are expressly prohibited:

Violation of this section is grounds for immediate suspension or termination under § 30 and § 31, without refund, and may be reported to law enforcement where appropriate.

§ 20

No Doxxing or Harassment

ProofChain has zero tolerance for doxxing or harassment conducted through or facilitated by the Platform, including by registered Agents.

§ 21

Bounty Content & Authorized Security Testing

ProofChain hosts and supports content related to security research and bug bounty programs. You may use the Platform in connection with security research only under the following conditions:

Unauthorized testing — including scanning, probing, or attacking systems without authorization — is prohibited even if you believe your intentions are good. ProofChain is not a safe harbor, authorization, or endorsement for any testing you perform; authorization comes from the system owner, not from ProofChain.

§ 22

On-Chain Data Permanence & Public Records

Important: Audit trails, registration records, and seal anchors are written to public blockchains. Blockchain records are public, permanent, and generally irreversible. Once anchored, ProofChain cannot delete, alter, or "unpublish" them, and neither can you.

§ 23

Intellectual Property — Deliverables You Own

You own the Deliverables created specifically for you under a paid engagement (for example, a completed Agent fix implementation, a custom compliance configuration, or a bespoke integration built for you), once you have paid in full.

§ 24

Intellectual Property — Platform We Own

As between you and ProofChain, ProofChain owns all rights, title, and interest in and to the Platform, including its software, code, design, documentation, APIs, the HXMP protocol, verification methodologies, KYA standards, trademarks, logos, and all content we create for the Platform itself.

§ 25

License to Use the Platform

Subject to these Terms and payment of applicable fees, ProofChain grants you a limited, non-exclusive, non-transferable, revocable license to access and use the Platform for your internal, lawful purposes.

§ 26

Third-Party Services

The Platform integrates with third-party services, including payment processing (Stripe), blockchain networks, and distribution platforms. Your use of those services is governed by their own terms and privacy policies, which you should review.

§ 27

Warranty Disclaimer

THE PLATFORM, ALL SERVICES, DELIVERABLES, SEALS, REPORTS, AND CONTENT ARE PROVIDED "AS IS" AND "AS AVAILABLE," WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY.

To the maximum extent permitted by law, ProofChain disclaims all warranties, including implied warranties of merchantability, fitness for a particular purpose, non-infringement, title, accuracy, and any warranties arising from course of dealing or usage of trade.

Without limiting the foregoing, ProofChain does not warrant that:

Some jurisdictions do not allow the exclusion of certain warranties, so some exclusions may not apply to you.

§ 28

Limitation of Liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, PROOFCHAIN AND ITS OFFICERS, DIRECTORS, EMPLOYEES, AGENTS, AND AFFILIATES SHALL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES — including lost profits, lost revenue, lost data, loss of goodwill, loss of wallet or cryptographic keys, business interruption, or damages arising from reliance on seals, reports, or verification results — arising out of or related to these Terms or your use of the Platform, even if advised of the possibility of such damages.

ProofChain's total aggregate liability arising out of or related to these Terms or the Platform, whether in contract, tort, or otherwise, shall not exceed the greater of (a) the amounts you actually paid to ProofChain in the twelve (12) months preceding the claim, or (b) one hundred dollars ($100).

You acknowledge that blockchain transactions involve inherent risks — including loss of keys, network forks, and irreversibility of transactions — and that ProofChain is not liable for losses arising from those risks. Some jurisdictions do not allow the limitation or exclusion of liability for certain damages, so some limitations may not apply to you.

§ 29

Indemnification

You agree to indemnify, defend, and hold harmless ProofChain and its officers, directors, employees, agents, and affiliates from and against any and all claims, damages, losses, liabilities, costs, and expenses (including reasonable attorneys' fees) arising out of or related to:

ProofChain reserves the right, at your expense, to assume the exclusive defense and control of any matter subject to indemnification, in which case you agree to cooperate with our defense.

§ 30

Termination

You may terminate these Terms at any time by closing your account and ceasing use of the Platform. Termination does not affect fees already due or paid.

ProofChain may terminate these Terms and your account:

Upon termination: your license ends; ProofChain may delete your off-chain account data after a reasonable grace period; and on-chain records remain permanent per § 22. Sections that by their nature survive termination — including §§ 22, 23, 24, 27, 28, 29, 32, 33, 34, 36, and 39 — will survive.

§ 31

Suspension of Service

ProofChain may suspend your access to the Platform, in whole or in part, without prior notice where we reasonably believe:

Where practicable, we will notify you of the suspension and the steps required to restore access. Suspension for your breach does not entitle you to a refund; suspension for our operational reasons will be followed by restoration as soon as feasible.

§ 32

Governing Law

These Terms and any dispute arising out of or relating to them, the Platform, or your use of it — whether in contract, tort, statute, or otherwise — shall be governed by and construed in accordance with the laws of the State of Minnesota, without regard to its conflict-of-laws principles.

Venue for any proceeding not subject to arbitration under § 33 shall lie exclusively in the state or federal courts located in Stearns County, Minnesota, and the parties consent to the personal jurisdiction of those courts.

The United Nations Convention on Contracts for the International Sale of Goods does not apply to these Terms. If you are subject to mandatory consumer-protection laws of your jurisdiction that cannot be waived, those laws apply to the extent they cannot be waived.

§ 33

Dispute Resolution

Informal resolution first. Before initiating any proceeding, the parties agree to attempt to resolve the dispute informally by contacting legal@proofchain.us (you) or by contacting you at the email address associated with your account (us). The parties will negotiate in good faith for 30 days from the date of the first notice before filing any proceeding.

Arbitration. If the dispute is not resolved informally, either party may elect to resolve it by binding individual arbitration administered by the American Arbitration Association (AAA) under its Consumer or Commercial Rules, as applicable. The arbitration shall be conducted in Stearns County, Minnesota, in English, and judgment on the award may be entered in any court of competent jurisdiction.

If arbitration is not permitted by applicable law, the dispute shall be resolved exclusively in the courts described in § 32.

§ 34

Class Action & Jury Waiver

Class action waiver: To the maximum extent permitted by law, all claims and disputes must be brought on an individual basis only. Neither party may act as a plaintiff or class member in any purported class, collective, or representative proceeding, and the arbitrator may not consolidate more than one person's claims or preside over any class, collective, or representative proceeding.

Jury waiver: To the maximum extent permitted by law, each party irrevocably waives any right to a trial by jury in any action, proceeding, or counterclaim arising out of or relating to these Terms or the Platform.

§ 35

Changes to These Terms

ProofChain may update these Terms from time to time to reflect changes in the Platform, the law, or our practices. When we do, we will revise the "Effective Date" at the top of this page and, for material changes, provide notice through the Platform or by email to the address associated with your account.

§ 36

Entire Agreement & Severability

These Terms, together with our Privacy Policy, Cookie Policy, Data Processing Agreement, and any SOW you execute, constitute the entire agreement between you and ProofChain regarding the Platform and supersede all prior agreements, understandings, and communications, whether written or oral.

If any provision of these Terms is held to be invalid, illegal, or unenforceable, that provision shall be enforced to the maximum extent permissible and the remaining provisions shall remain in full force and effect. No provision that is found invalid shall affect the validity of the rest of these Terms.

§ 37

Waiver & Notices

Waiver: No failure or delay by either party in exercising any right under these Terms operates as a waiver of that right, and no single or partial exercise precludes any further exercise. A waiver of any provision is effective only if in writing and signed by the waiving party.

Notices: ProofChain may provide notices to you via the email address associated with your account, through the dashboard, or by posting on the Platform. You may provide notices to ProofChain by emailing legal@proofchain.us or by mail at the address provided in § 40. Notices are deemed received upon sending for email and upon the earlier of receipt or three (3) business days after mailing for physical mail.

§ 38

Force Majeure

Neither party shall be liable for any failure or delay in performance caused by events beyond its reasonable control, including acts of God, war, terrorism, civil unrest, pandemics, government actions, power failures, internet or network outages, blockchain network disruptions (including forks, congestion, or chain discontinuation), strikes, or failures of third-party services. This section does not excuse payment obligations.

§ 39

Survival

The provisions of these Terms that by their nature should survive termination or expiration — including §§ 5 (On-Chain Audit Trails), 22 (On-Chain Data Permanence), 23 (Deliverables You Own), 24 (Platform We Own), 27 (Warranty Disclaimer), 28 (Limitation of Liability), 29 (Indemnification), 32 (Governing Law), 33 (Dispute Resolution), 34 (Class Action & Jury Waiver), and 36 (Entire Agreement & Severability) — will survive any termination or expiration of these Terms and remain binding on the parties.

§ 40

Contact

If you have questions about these Terms, your account, billing, or the Platform, contact us:

We aim to respond to support inquiries within 2 business days and legal inquiries within 5 business days.