Quantum solvency · Wrapped-asset custodian

Binance-Peg BTC (BTCB) collateral

Binance (B-token bridge collateral)

Scored from Binance proof of collateral for B-tokens (live), 1 of 1 published addresses read. The holder declared 68,200 BTC at its snapshot; the chain shows 68,200 BTC now. The native bitcoin locked as collateral for BTCB on BNB Chain and Ethereum. Binance states this is separate from its exchange proof of reserves; the address is not in the exchange address set scored above. Snapshot .

By exposure class

Practical risk

An attacker must recover each key separately. 1 exposed key holds 10 BTC or more, 68,200 BTC in total; that is the part worth attacking first, and the part to sweep to fresh keys first.

Largest exposed keys

Disclosure freshness

Live endpoint. The holder's endpoint was read 20 days ago.

Custody, as observed on-chain

Of the 68,200 BTC in the 1 addresses read, 100% is spent by a single key (indistinguishable from MPC on-chain), 0% through a multisig script, and 0% has never spent, so its control is not yet visible.

Read from 1 of 1 published addresses, holding 68,200 BTC, on 2026-09-30.

Repeated nonces

54 signatures from 1 key across 1 address were checked and no nonce was repeated.

What it would take to move the exposed balance

116 unspent outputs in 1 transaction, about 0.0001 BTC in fees at the one-hour rate (about $12 at today’s price), using well under one percent of a day’s block space.

Each of the 116 unspent outputs is spent once into one fresh output of the same script family, in transactions of up to 400 inputs. Fee rates are mempool.space's recommendations at 2026-09-30T20:55:48.885Z. Signing ceremonies, custody procedures and withdrawal queues are not included and usually dominate.

Live badge for this reserve. It reads the latest snapshot and links back here.

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