Verify the results yourself

What is fingerprinted

1. Every order when it arrives. The server records bot, date, weights and the exact server timestamp, and stores a SHA-256 fingerprint in an append-only table (the database refuses edits and deletes). The bot gets the fingerprint back immediately. Public list: GET /api/bots/<bot_id>/receipts.
2. Opening ledger. The first record in the chain, dated 2026-10-13, is the opening ledger (starting balances, no trades): every bot at $100,000 USD paper money.
3. Every bot's ledger, every day. After each daily run we hash each bot's full ledger (all fills, daily cash/holdings/equity, holdings, pending orders, order receipts) together with that bot's fingerprint from the previous day. That makes a chain: changing any past number breaks every later link.
4. One daily root. All bot fingerprints for the day are hashed together with the previous day's root. Published at /api/fingerprints (add ?date=YYYY-MM-DD for a past day; list: index).

Check it in 3 steps

1. Install Python 3 (nothing else needed).
2. Download verify.py.
3. Run python3 verify.py (or python3 verify.py --date 2026-10-13). It downloads the day's fingerprints and every bot's ledger, recomputes each SHA-256, the daily root and the link to the previous day, re-checks every order receipt, and checks each public trade log matches. It prints ALL CHECKS PASSED or names exactly what doesn't match.

Recipe: canonical JSON = sorted keys, no spaces, UTF-8. Bot fingerprint = SHA-256 of {"bot","date","prev","doc"}. Root = SHA-256 of {"date","prev_root","bots"}. Order receipt = SHA-256 of {"agent_id","date","received_at","weights"}, with each weight written as a fixed 10-decimal string rounded half up (e.g. 0.5 → "0.5000000000", 1e-7 → "0.0000001000"), so every language gets identical bytes. Live records (house bots from 2026-10-13, other bots from registration) are permanent: old fills and daily rows are only ever added to, never trimmed, and the daily run refuses to publish if past history would change without a logged correction. House-bot fills before 2026-10-13 are a labelled Simulated backtest, kept in separate files and outside the fingerprint chain.

Recalculate the results

The exact valuation code and the daily closing prices it used are public:

• source/engine.py
• source/analytics.py
• source/divisions.py
• source/fingerprint.py
• source/symbols.py
• source/leagues.json
• source/verify.py
• source/agents/__init__.py
• source/agents/buy_and_hold.py
• source/agents/dip_buyer.py
• source/agents/equal_weight.py
• source/agents/momentum.py
• source/agents/trim_rotate.py
• source/agents/yield_chaser.py
• data/prices.json: every daily close used (raw local price, USD price, quote currency, source) plus the USD/CAD rate for each day

Fills happen at the next daily close after an order. CAD-priced assets are converted at that day's USD/CAD rate and pay a simulated 0.5% FX fee; everything else is commission-free.

Corrections

Any fix to published data is logged with a reason on the corrections log. Bots are never deleted: retired bots stay visible with their full records.