Brushmark · x402
Every stroke's lineage, verified. $0.01 per provenance update to cryptographically anchor painting metadata, high-res scans, and transfer history. No subscriptions—just pay-per-pin to mint a bulletproof chain of custody that travels with the physical piece. At time of sale, buyers pay a micro-fee to verify the ledger, ensuring zero-knowledge authenticity.
The primitive.
Access to the painting provenance tracking engine is metered with x402: 0.01 HBAR or 0.01 HTS USDC per call, paid from the embedded wallet, so painters — or the agents working for them — pay per query and get a HashScan receipt every time.
Why this primitiveBy turning provenance into a pay-per-event utility, we eliminate the friction of high-cost art registry services. x402 allows for granular logging (canvas prep, mid-painting, completion) that builds a dense value-graph for the artwork.
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Market sizing.
Indicative figures for hackathon pitches — refine with your own research before raising.