Creative Blockchain
👗 Fashion & Textile Design · limited drop authentication

ThreadSign · Pay to Verify

A micro-metered authentication layer for physical luxury. Brands meter the secondary market: every time a collector 'scans to prove' authenticity or transfers the digital twin, a micropayment settles instantly to the designer. Payment is the heartbeat of the chain of custody. Anyone can pay 0.01 USDC over x402 to verify someone else's QUIP chain and walk away with a receipt.

x402 track · paid unlockPay-per-verify· verification market
Section · Onchain

The primitive.

full primer →

Whoever needs certainty about a limited drop authentication — not the creator — pays 0.01 USDC to have the WOTS+ chain replayed, and fashion designers get a signed verdict receipt they can keep.

Why this primitiveLoading details…

Kernel
a paid verification service where a third party — buyer, festival, insurer — pays 0.01 USDC over x402 to have someone else's WOTS+ chain replayed and gets a signed verdict receipt back
Drives the UI as
a verdict panel with pass/fail per nonce, the local browser verification beside the paid one, and a keepable receipt
Appendix · Secrets

Required keys.

METAMASK_PRIVATE_KEY
Deploys the QUIP verifier to your host chain. Fund on Sepolia via the Google Cloud faucet.
open ↗
SEPOLIA_RPC_URL
Host-chain HTTPS RPC endpoint. Any Sepolia provider works.
open ↗
ETHERSCAN_API_KEY
Required for npx hardhat verify after deploy.
open ↗

Add these in your Lovable project under Settings → Secrets before pasting the prompt below.

Appendix · Mega-prompt

The build prompt.

Paste into a fresh Lovable project. Make sure all five secrets above are set first. read the build strategy →

Loading the build prompt…
Open in Lovable ↗Sepolia Etherscan ↗
Appendix · Market

Market sizing.

TAM
…
SAM
…
SOM
…

Indicative figures for hackathon pitches — refine with your own research before raising.

See also

Adjacent entries.

limited drop authentication
Capsule Claim
Issue onchain certificates for limited edition capsule collections ensuring buyer confidence. The creator's existing wallet is wrapped with a post-quantum commitment.
recycled textile verification
ThreadTrace · Pay to Verify
A micro-attestation layer for sustainable fashion brands. Designers use these micro-certs to mint 'Verifiable Green' metadata on-chain, while resellers pay per-look-up to verify circularity. No subscriptions, just pay-per-stitch provenance. Anyone can pay 0.01 USDC over x402 to verify someone else's QUIP chain and walk away with a receipt.
eco-label validation
THREADSCAN · Pay to Verify
A pay-per-scan validation layer for the circular economy. Every scan generates a cryptographically signed receipt on Base, turning 'greenwashing' into a financial liability by metering the cost of proof. Anyone can pay 0.01 USDC over x402 to verify someone else's QUIP chain and walk away with a receipt.
batch quality control
ThreadSeal · Pay to Verify
Designers pay per lookup to verify tensile strength, dye-lot consistency, and compliance certificates before cutting patterns. Pay-per-batch eliminates heavy subscription costs for independent ateliers. Anyone can pay 0.01 USDC over x402 to verify someone else's QUIP chain and walk away with a receipt.