HORIZON SHIELD
Every claim below links to a source you can open yourself. The data is public. The records are on Bitcoin. The papers are archived where I cannot quietly edit them.
I started as a carpenter at 15. Thirty years on site. Then I taught myself to build AI. I made this so a homeowner does not need those 30 years to know if a price is fair.
The world is unfair, and too comfortable with it. The people who get overcharged are the ones who were never given the means to know. I think a person has the right to know whether their price is fair. So I built the means.
Nothing here asks for trust. Open the links. Check the hashes. Re-verify the timestamps. If something does not hold up, it does not belong here.
01 / The dataset
JCCDB v2.0 catalogues 65,729 items across 398 categories. Item names, categories, and units. No prices are baked into the schema. Pricing lives in a separate reference layer, so the open vocabulary cannot be mistaken for a price quote. Published openly under CC BY 4.0.
02 / The cryptographic anchor
A government office, an industry body, or a university server can quietly edit a record later. Bitcoin cannot. Not even by me. The fingerprints below are confirmed in Bitcoin blocks. Anyone can re-verify them at opentimestamps.org.
Each consumer PDF report also carries a per-diagnostic SHA-256 audit hash, so the same input always reproduces the same fingerprint.
03 / The academic record
The method is written up and archived in places that issue permanent identifiers. These are preprints. Open to scrutiny, not hidden behind a paywall.
04 / What the data shows
These come from a self-selected sample of homeowners who already suspected overcharging. They describe what the tool surfaces, not population averages. Said plainly, on purpose.
05 / Who built this
Toshikatsu Oga. Carpenter at 15 in Osaka, 1993. Site supervisor, then construction manager, then self-taught AI engineer. Thirty years on the tools before a line of this code.
Last verified 2026-06-03. All links checked live.
HORIZON SHIELD · shield.the-horizons-innovation.com