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 v5.1 holds 526,128 records: 95,403 items across 402 categories (item names, categories, and units, with no prices baked into the item schema) and 430,725 observations that record values from public documents, each with its source and terms of use. HORIZON SHIELD 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