What is proof of reserves?

A plain definition

Proof of reserves (PoR) means demonstrating that claimed digital-asset balances are real and under the claimant’s control. In professional workflows it means tying a balance claim to evidence from the wallet or exchange account that holds the assets, then keeping a record that can be reviewed later.

For custodians and exchanges, PoR often means publishing cryptographic commitments over customer liabilities. Scrya focuses on the client-level version of the same idea: prove that this person or business controls these wallets or accounts, and record the balances observed at verification time.

Why screenshots are not enough

Screenshots, CSV exports, and emailed statements are easy to fabricate or alter. They also break the link between the claim and the underlying address or account. Strong evidence binds the claimant to cryptographic control (message signing) or validated read-only account access.

Scrya is non-custodial: clients prove ownership from their own wallet or exchange. Scrya never takes custody of, moves, trades, or withdraws funds.

What a Scrya verification includes

• Wallet ownership via human-readable message signing (EIP-191 on EVM chains, TIP-191 on Tron, ed25519 on Solana, BIP-137 on Bitcoin).
• Exchange balances via secure, read-only API access — permissions checked before any balance is read wherever the exchange exposes them.
• Chain-aware balance checks through the explorers and RPCs for each supported (asset, network) pair.
• A bounded monitoring window (24 hours) after a wallet proof starts, so verification completes or expires cleanly rather than hanging on a single snapshot.
• A tamper-evident PDF certificate with a SHA-256 document fingerprint the business can file with the engagement.

Who uses these workflows

Auditors gather independent evidence for engagement files. Mortgage brokers and lenders assess borrower crypto positions. Financial planners advise with a verified view of client holdings. Lawyers verify disclosed assets before settlements. VASPs can collect wallet-control proof as part of recipient checks.