Fix Proof, first screen of the live demoTry it live
Live demo with sample data. No wallet needed.
Reserve · refundable depositMINE YOUR HUMAN

Fix Proof

Tradespeople log each repair with photos and a customer signature, sealed onchain as a warranty.

Try it live, free
$159one time, base tier
Built on order. Reserve it today for a $40 refundable deposit, pay the balance when it is delivered. Delivery: 1 to 2 days after the base build exists.
Reserve for $40Want it fully custom? From $1,100 · talk to us
PortsBase · Polygon · Celo
KindOps
OwnerYou, on your wallet and git
Picture this

Who it is for

Joy fixes a boiler and her customer taps to sign on her phone. A year later when the part fails, both of them can pull up the sealed job record without arguing about dates.

Two ways to own it

What you get

Base$159
$40 deposit to reserve

Job log with photo hashes, customer signature via email or wallet, warranty page, worker profile.

  • You choose: chain
  • You choose: name and logo
  • You choose: accent color
  • You choose: trade type
Customfrom $1,100
Built around you

Reshape it entirely: new features, your flows, your brand end to end, integrations you need. We scope it with you.

  • Everything in Base
  • Custom features and design
  • Priority build
Why it is new

What exists today, and what this does differently

What is new

Blockchain-anchored job photos exist; a tradesperson repair warranty flow is less common.

Closest things out there

Kura and Record360 anchor inspection photos to blockchains, and WarrentChain stores warranties onchain, but none combine repair logs with customer signatures for tradespeople.

Checked with web searches in October 2026. A search is not proof that nothing similar exists, and the market moves fast, so we recheck before every build.

What it unlocks

The human in it

Mines your craft into a verified work history no platform can take.
The Regatta Board

Races it can enter

grant · Polygon · rolling
Polygon Community Grants
seasonal; current season unknown
Official page ↗

Real-world payments and apps; existing projects OK.

Their rule on existing code: Existing projects OK
grant · Base · rolling
Base Builder Grants
rolling, retroactive
Official page ↗

Existing shipped projects OK.

Their rule on existing code: Existing shipped projects OK (retroactive)
What you own

The whole app, not a starter kit.

The complete Fix Proof app: tradespeople photograph each repair, get the customer's signature on any phone and seal the job with its warranty, so a year later it is a fact both sides can check.

Base price · $159

The user app, complete

Every buyer gets the same finished app. Basic branding and copy changes come through a quick form.

Three step onboardingHome
Shown once: photo it as you go, the customer signs, sealed.
Today's job and next actionHome
The next job card, monthly sealed count, live warranties and streak.
Friday recordHome
Weekly summary, streak and warranties ending soon. Gated behind Pro.
Job card setupJob
Trade, warranty length, labour and part total, and how the customer signs.
Photo fingerprintsJob
Before, part and after photos hashed on the phone. Images stay with the worker.
Tap to sign with a texted codeJob
Works on any phone; falls back from failed links, or marks the job pending until signed by link.
Seal and onchain receiptJob
One sponsored EAS attestation on Base, Polygon or Celo, with what is and is not onchain.
Sealed job recordsRecords
Every job with warranty progress, filters, check link and customer copy.
Service remindersRecords
Warranties ending become a call list, only for customers who agreed. Gated behind Pro.
Claims and photo checkerClaims
Covered, expired and stranger claims settled from the record; any photo checked against its fingerprint.
Public profile, plans and insurer exportMe
A work history the worker owns, USDC checkout for Pro and Crew, and a gated export for insurers.
Open the full app demo
Add-on

Owner console

Your admin side: revenue, paywall editor, users, rules and the agent log.

Revenue and paywall editorRevenue
MRR, incoming USDC payments, payouts, tier names, prices, free job limit, gates and payment methods.
RulesRules
Default warranty, network, required photos, code fallback, customer copy, gas sponsoring, fake job guard.
Agent log and running costsAgent
What the van assistant did, what failed and how it adapted.
Priced roadmapRoadmap
v2 and v3 builds requestable from the console.
Top-up

Growth and referrals

Referral and growth mechanics, switched on when you are ready to grow.

Growth loops and cohortsGrowth
Customer copies, supplier counter days, referrals, association editions and retention cohorts.
The money path, built in

How it earns for you

Traders start free and upgrade per month in USDC. Firms pay for Crew, and trade associations pay for a branded edition for their members. Customers never pay to see their own job.

FreeFreeUp to 10 sealed jobs a month, public profile, warranty page per job
Pro$9 a monthUnlimited sealed jobs, service reminders, Friday record, custom profile link
Crew$29 a monthEverything in Pro for up to 6 engineers, shared history, export for insurers

Association editions from $250 a month. Gas (under 1 cent per seal) and SMS (a few pence per job) can be sponsored by the owner.

Prices are yours to set. Illustrative, not a promise of income.

Growth loops, built in

How it spreads

  • Customer copy: every sealed job texts the customer a copy with the trader's name, forwarded to family and neighbours
  • Supplier counter days that onboard traders in a batch
  • Public profile links shared in local groups instead of lead sites
  • Service reminders that bring the same customer back each year
  • Trader to trader referral codes worth a free month for both
Roadmap · build the next phase with us

Where it goes next

v1 included
The full trades app
  • Job card with photo fingerprints
  • Tap to sign with a texted code, sign by link
  • Sponsored seals on Base, Polygon or Celo
  • Records, claims, photo checker, public profile
  • Paywall with USDC checkout
Included
v2
Home record and crew console
  • Homeowner record: every repair on one house
  • House sale pack for buyers and surveyors
  • Crew console for firms with 2 to 20 vans
  • Voice note job summaries
Add-on from $400
v3
Insurer and landlord evidence network
  • Evidence API for insurers and letting agents
  • Trade association branded editions
  • Supplier counter cards and parts serial lookup
  • Portable work history across platforms
Add-on from $900
For investors and grant reviewers

The pitch, ready

Every repair sealed with photos, the customer's signature and the warranty, so disputes end in minutes.

Problem: Small tradespeople lose time and money when customers dispute what was done and when. Paper job sheets get lost, and platform reviews belong to the platform, not the worker.

Solution: Photos are fingerprinted on the phone, the customer signs on any phone with a texted code, and the job is sealed onchain with its warranty terms. Only hashes go onchain.

Why now: Sponsored gas on Base, embedded email wallets and cheap small models make a tamper proof job record practical for people who never touch crypto.

Market: Solo tradespeople and small trades firms, plus the suppliers, associations, insurers and landlords who need trustworthy job evidence.

The ask: Pilot partners: one trade association and one merchant chain, and grant funding from Base Builder Grants and Polygon Community Grants.

Funding is never guaranteed. Check each program's rules.

For hackathons and demo days

Your 2 minute demo

  1. Home: meet Joy, 38, gas engineer in Salford, on her way to Peg's boiler at 12 Elm Row.
  2. Job: set trade, warranty and labour, then take the before, part and after photos.
  3. Job: the sign link fails on Peg's flip phone, the app switches to tap to sign with a texted code.
  4. Job: press the copper seal and read what is and is not onchain.
  5. Claims: skip ahead 11 months, Gareth's claim is covered and a stranger's claim finds no seal; check a photo.
  6. Records: warranties ending become service reminders, unlocked with Pro through USDC checkout.
  7. Owner Revenue: change the Pro price and free job limit, preview the user Plans screen.
  8. Owner Growth and Roadmap: run a supplier counter day, then request the v2 home record.

Many hackathons require code written at the event. See the Regatta Boardfor each race's rule.

Make it entirely yours

Custom work from $1,100: your own trades and job templates, integrations with job management or accounting tools, extra languages, or an association branded deployment. Scoped on a call.

Custom from $1,100
BLUEPRINT

Why it matters and how it really works

The need

Small tradespeople lose time and money when customers dispute what was done and when. Paper job sheets get lost, and platform reviews belong to the platform, not the worker.

What exists and what is new

Close neighbours exist: Kura and Record360 anchor inspection photos to blockchains, and WarrentChain stores warranties onchain. What is less common is one simple flow built for a solo tradesperson: photos, a customer signature that works on any phone, warranty terms, and a public work history the worker owns. The pieces are not new, the combination for this user is.

The data it runs on

Per job: photo fingerprints (hashes), customer signature fingerprint plus a texted code, warranty terms, the time, and the worker's public trade name. Photos and customer details stay on the worker's device and encrypted backup.

1.The mission

Every honest repair becomes a fact both people can check, and every tradesperson owns the proof of their craft.

2.Why people can't resist it

The argument that never happens When a part fails, both sides open the same sealed record. Dates and terms stop being a matter of memory.

A profile that is yours Hundreds of signed jobs form a work history no lead site can delist or charge to show.

Friday record A weekly summary of jobs sealed, a streak, and warranties ending soon, which doubles as a list of people to call for a service.

3.How it works for real

Phone first app: A web app the worker adds to their home screen. Photos are hashed with SHA-256 on device; images go to an encrypted backup the worker controls.

Accounts: Privy email or phone login creates an embedded wallet on Base for the worker. Customers never need a wallet; they sign on the worker's screen with a code texted to their own number, or by link.

Attestations: Each job is an EAS attestation on Base with a fixed schema: photo hashes, signature hash, terms hash, timestamp. Polygon or Celo can be chosen at setup.

Gas sponsorship: A paymaster on Base covers attestation gas so neither worker nor customer touches crypto.

Warranty page and checker: A public page per job and per worker reads attestations through an indexer such as the EAS GraphQL API. Anyone can drop in a photo to check it matches its fingerprint.

Assistant: A small model tier (for example a Claude Haiku class model via an API) drafts the job summary from voice notes and flags missing photos. A larger model is only used for dispute summaries.

Notifications: SMS via a messaging provider for signature codes, the customer copy, and annual service reminders.

4.Cost per use and pricing

Per job, roughly: attestation gas on Base usually well under 1 US cent (check live gas), 2 SMS messages at about 4 to 8 cents total in the UK, and a short small model call under 1 cent. Call it under 10 cents a job. Example month: a worker doing 80 jobs costs about 8 dollars, plus storage of a few gigabytes of photos at well under 1 dollar.

Free $0
Up to 10 sealed jobs a month, public profile, basic warranty page.
Pro $9 a month
Unlimited jobs, service reminders to past customers, Friday record, custom profile link.
Crew $29 a month
Up to 6 engineers under one business name, shared job history, export for insurers.

5.Growth loop

Every sealed job sends the customer a copy with the worker's name and a link. Customers forward it to neighbours and family, profile links get shared in local groups, and service reminders bring the same customer back each year.

6.Risks and guardrails

Not a legal guarantee: A sealed record proves what was agreed and when. It does not replace consumer law, insurance or trade body rules. The app should say so plainly.

Privacy: Never put names, addresses or photos onchain. Only hashes. Customers can ask for the offchain copy to be deleted; the hash alone reveals nothing.

Fake jobs: A worker could seal jobs with a friend as the customer. The texted code to a real number, plus rate limits and patterns, reduces this but cannot remove it.

Lost phone: Photos must be backed up, or the hashes cannot be matched later. Backup is on by default.

SMS failure: Codes can be delayed or blocked. A fallback lets the customer sign later by link, with the job marked pending until they do.

7.Build order

  1. Job card with three photo slots and on device hashing
  2. Tap to sign with texted code, plus sign by link
  3. EAS schema and sponsored attestation on Base
  4. Public job page and photo checker
  5. Worker profile with job count and trades
  6. Friday record and annual service reminders

8.Where this is going

  1. Now
    Solo tradespeople seal jobs and settle warranty questions in minutes.
  2. Next
    Customers carry a home record: every repair on the boiler, wiring and roof, ready when they sell the house.
  3. Later
    Insurers and landlords accept sealed job records as evidence, saving inspections and paperwork.
  4. The world it builds
    Skilled workers everywhere own a verified history of their craft, which travels with them across cities, platforms and borders.

Costs and tools are estimates at the time of writing. General information only, not legal or financial advice.

OWNER PLAYBOOK

Own it, then chart your voyage

NRevenueVentureBuilder statusHackathonsProductivityInspire othersPartnershipsPortfolioAgencyFIX PROOF

Nine routes from one vessel. Tap a port to open its chart.

Why own Fix Proof

Fix Proof lets a tradesperson seal each repair with photos and a customer signature, so a warranty claim a year later is a lookup, not an argument. Owning it means the trades firms that rely on it pay you, and every sealed job carries your brand into homes in your area. It is a quiet, trusted record nobody can edit, and you are the one who runs it.

What’s stopping you?

“I can't code.”

You don't need to. The app ships deployed to your wallet with a setup guide. Your work is standing next to one tradesperson for a morning and helping their first customers sign.

“Tradespeople hate new apps.”

Many do. Keep it to one tap after the job, and pitch it as fewer warranty arguments, not as crypto. Some will never switch, so start with the ones who already photograph their work.

“Is a sealed record a legal warranty?”

It is evidence of what was done and when, not a legal contract by itself. Firms should keep their normal written terms and use Fix Proof as the proof behind them.

“Is it really mine?”

Yes. The contracts deploy from your wallet, and the brand, domain and customer list are yours. DEPLOYR takes no cut of what you charge after purchase.

“What if it breaks?”

Records live onchain on contracts deployed from your wallet, so a page outage does not erase anything. Setup issues are covered by the get-it-shipped promise.

The million-dollar ladder

Trades firms pay a monthly plan per van or technician, and trade associations pay for a branded version for members. Reaching $1M a year is a target to plan toward, not a promise. Most growth comes from associations and suppliers, not single traders.

$50
$6,000
$40,000
$85,000
First vans
10 tradespeople
$5/mo
Local trades
400 tradespeople
$15/mo
Firms and shops
800 firms
$50/mo
Associations
850 firms
$100/mo
  • Customers who see the seal and ask their next trader for it
  • Supplier counters that hand out Fix Proof cards
  • Association member deals
  • A warranty report firms send with every invoice

Illustrative stages, not a forecast. Results depend on you and the market; nothing here is guaranteed.

Pick your destination

Grow it to a million-dollar app
Fix Proof earns when plumbers, electricians, repair shops and trade associations use it, so the fastest money comes from one real sealed job that people can see working.ARRIVE: 10 sealed jobs and your first paying customer within 30 days.5 moves · first one within the hour →
Raise for it
Fix Proof solves a real coordination problem on Base, Polygon or Celo, which is exactly what ecosystem grant programs and accelerators say they want to fund.ARRIVE: Two funding applications submitted with real usage numbers attached, within six weeks.5 moves · first one within the hour →
Become a real builder on a chain
Running Fix Proof from your own wallet builds a real onchain history on Base that other builders and programs can see.ARRIVE: A verified contract, a public builder profile, and a weekly shipping log for 8 weeks.5 moves · first one within the hour →
Win with it at hackathons
Fix Proof is a working product, which gives you a strong base for hackathon tracks on Base, Polygon or Celo if the event allows existing code.ARRIVE: One hackathon entry submitted with a new feature built during the event.5 moves · first one within the hour →
Run your own work on it
Most of the work around Fix Proof is repeat admin, so a simple weekly routine saves hours.ARRIVE: A weekly routine under one hour and a saved message library.4 moves · first one within the hour →
Get your people moving
Fix Proof has a human story at its heart, so sharing real moments pulls people in better than features.ARRIVE: Four story posts published and at least one new user who came from them.4 moves · first one within the hour →
Partner with founders and projects
Fix Proof grows faster through groups that already gather tradespeople and their customers than through one by one outreach.ARRIVE: One signed partnership with a group that brings at least 20 users.4 moves · first one within the hour →
Prove your skills with it
Owning and running Fix Proof is proof you can ship and grow a real onchain product, which matters for jobs, clients and grants.ARRIVE: A portfolio page with live links, numbers and one testimonial.4 moves · first one within the hour →
Sell it as a service
Many plumbers, electricians, repair shops and trade associations want what Fix Proof does but will not set it up themselves, so you can charge for done for you setup.ARRIVE: Three paid setup clients within 60 days.4 moves · first one within the hour →
No budget yet? Be a CEO anyway at CEOism, then come back for your vessel. ceoism.com ↗
Moored nearby

Related vessels

Handoff Vault, first screen of the live demoLIVE DEMO

Handoff Vault

Leave clear onchain instructions so the people you trust can reach your crypto if you cannot.

Reserve · refundable deposit
$179Base · Arbitrum +1
Approval Sweep, first screen of the live demoLIVE DEMO

Approval Sweep

A weekly ritual that finds risky token approvals and lets you revoke them in one tidy pass.

Reserve · refundable deposit
$129Base · Arbitrum +2
Ship Log, first screen of the live demoLIVE DEMO

Ship Log

Every commit, deploy, and demo you ship becomes a signed, timestamped builder diary.

Reserve · refundable deposit
$149Base · Optimism +1
Grant Ledger, first screen of the live demoLIVE DEMO

Grant Ledger

Show funders exactly what their grant built, milestone by milestone, with proof attached.

Reserve · refundable deposit
$199Optimism · Arbitrum +2
Hack Week Pilot, first screen of the live demoLIVE DEMO

Hack Week Pilot

A hackathon cockpit that plans your scope, tracks bounties, and drafts a judge-ready submission.

Reserve · refundable deposit
$169Base · Solana +1
Node Diary, first screen of the live demoLIVE DEMO

Node Diary

Your DePIN devices report uptime and earnings in one honest dashboard with tax-ready exports.

Reserve · refundable deposit
$189Solana · Base +1
Lease Trail, first screen of the live demoLIVE DEMO

Lease Trail

Tenants and landlords seal move-in photos and rent receipts so deposit disputes end fast.

Reserve · refundable deposit
$169Base · Polygon
One Wallet Pledge, first screen of the live demoLIVE DEMO

One Wallet Pledge

Airdrop hunters prove they are one real person with one main wallet and get ranked fairly.

Reserve · refundable deposit
$149Base · Optimism +1
Contact us