Why On-Chain Verification Matters
In traditional fund management, investors rely on custodian statements and auditor reports to confirm that a fund’s assets exist. These reports are produced periodically (often quarterly) and require trusting the custodian and auditor. With blockchain-based custody, verification is:- Real-time — Balances can be checked at any time, not just at reporting periods
- Independent — Anyone can query the blockchain directly; no need to request statements
- Immutable — Transaction history cannot be altered after the fact
- Public — The same data is visible to all parties; no information asymmetry
What Can Be Verified
Because all assets are held on the Polygon blockchain, the following are publicly verifiable:| What | How | What It Confirms |
|---|---|---|
| USDC balances | Query the custody wallet’s ERC-20 USDC balance | Cash held in custody |
| Outcome token holdings | Query the custody wallet’s ERC-1155 token balances | Prediction market positions held |
| Transaction history | Review all deposits, withdrawals, and trades on-chain | Full history of fund movements |
| Position existence | Confirm that specific outcome tokens (by token ID) are held | That specific market positions exist |
The Reconciliation Concept
Belief Index maintains an internal ledger that records all positions, cash balances, and share ownership. This internal ledger should agree with what is observable on-chain. Reconciliation is the process of comparing the two:Internal ledger state
The system records what it believes it holds: which positions, in what quantities, with what cash balances. This is the data used for NAV computation and share pricing.
On-chain state
The Polygon blockchain records what the custody wallet actually holds: the real token balances and USDC amounts, as verified by the blockchain’s consensus mechanism.
This is conceptually identical to how traditional fund administrators reconcile a fund’s internal books against custodian statements. The difference is that the “custodian statement” is a public blockchain that anyone can read — not a private document sent quarterly by a bank.
Asset-Based NAV Computation
Belief Index computes NAV per share using actual on-chain token balances, not just theoretical index weights. This means:- Position values are based on real holdings verified on the blockchain
- Each NAV computation records whether it used on-chain data or a theoretical fallback
- Investors can cross-reference the reported position sizes with on-chain balances
How on-chain balances feed into NAV
How on-chain balances feed into NAV
What This Means for Investors
- Positions are real. The outcome tokens backing your shares exist on-chain and can be independently confirmed by querying the Polygon blockchain.
- No hidden leverage. The actual on-chain balances determine position value, not a theoretical model or internal estimate.
- Auditable history. Every acquisition and disposition of positions is recorded immutably on the blockchain. The full transaction history is available to anyone.
- Continuous verification. Unlike quarterly audits, on-chain data can be checked at any time.
Limitations
On-chain verification confirms that assets exist in the custody wallet. It does not, by itself, confirm:- Series attribution — That specific assets are correctly allocated to a specific series (this is an internal ledger matter, not visible on-chain)
- NAV correctness — That the NAV computation methodology was applied correctly (requires verifying the computation, not just the holdings; see NAV Methodology)
- Share allocation — That shares are correctly distributed among investors (internal ledger)
- Operational controls — That custody governance and withdrawal safeguards are functioning as described
- Future solvency — That current holdings will be sufficient to meet future obligations