Questions worth
answering straight.

A client won't pay me after the work is finished. What can I actually do?

Your position depends almost entirely on what you can prove. A screenshot, a text thread, or a verbal agreement can all be disputed or re-characterised later. TrustChain keeps a record that is hard to dispute: each party verifies their identity before signing, both sign the same final text, and every signature is logged with its time. Either signer with a TrustChain account can then anchor the record on the Polygon public blockchain, which writes its fingerprint with a public date that TrustChain cannot change. After that, a change to its title, terms or amount would no longer match the anchored fingerprint.

Is an agreement signed on TrustChain legally binding?

TrustChain records what was agreed, which accounts signed it (ID-checked for every signature since July 30, 2026), and when. It does not, and cannot, guarantee that any particular agreement is enforceable in your jurisdiction. Enforceability depends on where the parties are, what the agreement covers, and local law. What does not depend on jurisdiction is the anchor: a Keccak-256 fingerprint on a public blockchain, and its date, can be checked the same way anywhere in the world. TrustChain is a technology platform, not a substitute for legal counsel.

How is this different from DocuSign or a signed PDF?

An e-signature platform proves a document was signed and stores it on the vendor's servers. TrustChain adds three things: Sumsub checks each person's ID before a signature is accepted, so every new signature comes from an ID-checked account; a fingerprint of the record can be anchored on a public blockchain, where it and its date stay on record whatever happens to TrustChain; and AI Advisor explains the terms before you commit. An e-signature is usually tied to an email address, not to a checked ID.

See also: Plain-words agreement templates

Can the other party, or TrustChain itself, change or delete my agreement after it's signed?

The other party cannot: once an agreement is signed, neither side can edit or delete it in the app, and the event log can only be written by TrustChain's servers. TrustChain stores the text, so it could technically change it. Your safeguards: download the record and PDF once both parties have signed, free on every plan. If it was anchored, its fingerprint sits on Polygon, which TrustChain cannot rewrite, and the Polygon check on its Proof tab compares the stored agreement with it in your browser. Its record file lets anyone rerun that check with the open verifier.

See also: How do I check that a signed agreement was not changed?

Does TrustChain give legal advice for my province or country?

TrustChain's AI Advisor explains clauses in plain language and flags risks in any jurisdiction, and it answers in your own language. For questions covered by its indexed legislation (currently British Columbia, Canada, starting with the Builders Lien Act) it answers from the actual statute text and cites the act, the section number, the consolidation date, and a direct link to the official government source, so you can verify every figure yourself. It also flags provisions whose amendments have been passed but are not yet in force. Outside that indexed corpus it gives general orientation and says plainly that it cannot cite governing law. It is instructed to say it does not know rather than guess.

How do I prove what my client agreed to?

Keep the agreed text, the date, and who accepted it in a form neither side can quietly change. On TrustChain both parties verify identity and sign the same final text, and each signature gets a timestamped entry in the audit trail. An optional Polygon anchor writes a Keccak-256 fingerprint of the record and dates it publicly. The fingerprint covers TrustChain's internal record IDs as well as the text, so it cannot be recomputed from a copy of the text alone. Without such a record, your evidence is messages, invoices and delivery proof, which can be disputed.

What is a tamper-evident agreement record?

A tamper-evident record does not stop changes; it makes them detectable. When a TrustChain record is anchored, a Keccak-256 fingerprint of it is written to Polygon with a public date. Altering one character of its title, terms or amount produces a different fingerprint, so the stored record either still matches the anchored one or it does not. Signatures and their times are not in the fingerprint; they are logged in an audit trail only TrustChain's servers can write, and no one can sign without first passing an identity check.

Can someone verify a TrustChain record without an account?

Yes. Once both parties have signed, anyone holding the public link can open it without an account. The page shows the record's status and never the parties' identities; the agreement title appears only on records created on the Elite plan. If the record was anchored, the page also shows its fingerprint and Polygon transaction, which can be checked on any Polygon block explorer, independently of TrustChain.

What does "anchored on Polygon" mean?

Anchoring writes the record's fingerprint into a transaction on the Polygon mainnet, a public blockchain TrustChain does not control. The transaction carries its own timestamp, so the fingerprint is provably dated even if TrustChain's servers disappear. The transaction holds the fingerprint and TrustChain's ID for the record, with two empty wallet slots; no agreement text, names, emails or amounts are written on-chain. Anchoring is optional; it costs $1 on the Free plan for verified accounts and is included in Pro (20 a month) and Elite (100 a month).

What does identity verification involve, and who sees my ID?

Each person verifies with a photo ID and a selfie before signing; a registered account does it once. Verification is done by Sumsub, a third-party identity provider, inside its own window; the images don't pass through TrustChain's servers. TrustChain records the verified status, and an unverified account can't sign. Identities are never shown on the public record page and are never written to the blockchain. The Privacy Policy describes how Sumsub handles the documents.

Is my agreement text stored on the blockchain?

No. Anchoring writes a Keccak-256 fingerprint of the record and TrustChain's ID for it to Polygon, and the fingerprint reveals nothing about the text. The agreement text itself is stored on TrustChain's servers, which serve your record, certificate and PDF. The private chat is end-to-end encrypted with keys on your devices, so TrustChain can't read your messages.

What does the free plan include, and what costs extra?

The Free plan is $0 with no card: 1 agreement and 3 AI Advisor requests a month, private chat, an identity check before signing, and a public link for each signed agreement. Anchoring, which puts the record's fingerprint on Polygon, is not included on Free: an extra anchor or an extra agreement costs $1 each, one-off. Your own record, certificate and PDF are free on every plan, and the person you invite never pays to open, sign or keep their copy. Pro is $19 a month and Elite $49, in USD, cancel any time.

Does TrustChain work outside Canada?

The record is the same anywhere: an anchored fingerprint and its Polygon date can be checked from any country, and identity checks and signing times are recorded the same way wherever the parties are. What varies is enforceability. Whether a specific agreement is enforceable depends on where the parties are and what they agreed, and TrustChain makes no claim about that for any place. The AI Advisor quotes statute only for the British Columbia Builders Lien Act; everywhere else it gives general guidance.

Can a landlord or tenant use TrustChain?

Yes, for any agreement between two people: a lease addendum, a deposit receipt, a repair arrangement, a payment schedule. Both parties verify identity, sign the same text, and each can download a timestamped record, which either can anchor on Polygon. Residential tenancy law in most places sets rules a private agreement cannot override, and TrustChain does not check your terms against those rules; it records what was signed.

See also: Plain-words agreement templates

What happens to my proof if TrustChain shuts down?

Download your record, certificate and PDF; they are free on every plan and are yours to keep. If the record was anchored, the fingerprint and its date stay on Polygon regardless of TrustChain, and your certificate lists the same fingerprint and transaction. The fingerprint also covers internal IDs, so it cannot be recomputed from the text alone; the record file on an anchored agreement's Proof tab holds them, so keep it with your PDF. If it was not anchored, the proof depends entirely on the copies you hold, so download them once both parties have signed.

Who is Pip?

Pip is the TrustChain guide you can open on the site. Pip explains how TrustChain works: its pages, plans and next steps. Pip isn't a lawyer and doesn't give legal advice. To stop the automatic tips, open Pip and press Turn off automatic tips and waving.

Is TrustChain related to "chain of trust" certificates or the EU TrustChain programme?

No. TrustChain Registry at trustchain.biz is an independent product for recording agreements between two people, built by a solo founder in British Columbia and operated by Kirillskiy Construction Ltd. It has no connection to PKI certificate chains, to the EU NGI TrustChain programme, to decentralized-identity trust registries, or to other companies using the name.