OKX has reported 139,865 BTC in customer account assets in its 47th proof-of-reserves report, a 4.07% increase from the exchange’s Aug. 11 snapshot.
- OKX reports 139,865 BTC in user assets, up 4.07% from its previous August reserve snapshot.
- Ether user holdings rose 3.49% to 1.786 million ETH between August and September monthly snapshots.
- USDT user account assets increased 4.62% to 8.49 billion tokens while reserves covered 105% overall.
- OKX lists $27.4 billion in primary assets across its latest proof-of-reserves publication for September 2026.
- The exchange uses zk-STARK proofs and wallet addresses to let customers verify reserve inclusion independently.
OKX reports $27.4 billion in primary assets in the September report, based on a Sept. 8 snapshot. The exchange listed 153,151 BTC in controlled wallet assets against the 139,865 BTC held in user accounts, producing a Bitcoin reserve ratio of 109%.
The August snapshot contained 134,399 BTC in account assets and 148,552 BTC in exchange-controlled wallets. User holdings therefore increased by 5,466 BTC between the two reporting dates, while the reserve ratio moved from 111% in August to 109% in September.
OKX user Bitcoin holdings rose by 5,466 BTC
Bitcoin recorded the largest headline increase among the three assets cited in OKX’s latest comparison. Customer BTC balances climbed from 134,399 BTC on Aug. 11 to 139,865 BTC on Sept. 8, representing an increase of 4.07%.
Of the 153,151 BTC shown as wallet assets in September, OKX classified 146,359 BTC as exchange-held and another 6,792 BTC as held through third-party custody. The exchange’s reserve page states that third-party custody balances remain with outside custodians and can be verified through those providers.
The reserve ratio does not represent a gain or return for customers. OKX calculates the figure by comparing assets under its control with the corresponding account assets recorded for users. A ratio above 100% indicates that the reported wallet holdings exceeded the customer balances captured in that snapshot.
An earlier OKX proof-of-reserves report covering $35.4 billion in customer-backed assets showed how the exchange has continued publishing reserve snapshots across changing crypto market conditions. The current report puts its primary-asset figure at $27.4 billion.
ETH and USDT account balances increased in September
Ether user holdings rose from 1,725,703 ETH in August to 1,785,866 ETH in the Sept. 8 snapshot. The increase of 60,163 ETH equals roughly 3.49% month over month.
OKX reported 1,796,024 ETH in wallet assets, giving Ether a reserve ratio of 101%. The exchange classified 1,716,056 ETH under exchange custody and 79,968 ETH under third-party custody. Ethereum’s reserve ratio remained at 101% compared with the previous snapshot.
USDT recorded a larger percentage rise in customer balances. Account assets increased from 8.118 billion USDT in August to roughly 8.493 billion USDT in September, a gain of around 375.2 million tokens, or 4.62%.
The September report listed 8.953 billion USDT in wallet assets, including approximately 8.818 billion held through exchange wallets and 135.6 million through third-party custody. Its reported USDT reserve ratio stood at 105%, down from 106% in the August snapshot even as customer holdings increased.
OKX proof of reserves covers more than BTC and ETH
Other assets on the latest reserve page remained at or above 100% coverage. USDC had a reported reserve ratio of 100%, with 1.913 billion tokens in account assets compared with 1.922 billion in wallet assets. XRP stood at 108%, while DOGE carried a 101% ratio.
Solana’s ratio stood at 105%, backed by 7.762 million SOL in wallet assets against 7.412 million SOL in account balances. OKB showed 19.75 million tokens in wallet assets compared with 19.72 million in account assets, producing a reported ratio of 100% after rounding.
OKX says its reserve reporting covers 22 coins, including Bitcoin, Ether and major stablecoins. The exchange’s published figure of $27.4 billion refers to its primary assets and should not be read as the dollar value of every asset or liability across every OKX business entity.
For context, an earlier crypto.news guide explaining how proof of reserves works notes that PoR typically matches verifiable exchange-controlled assets against customer liabilities at a specific point in time. Such snapshots do not by themselves provide the same scope as a full financial audit, which can examine off-chain debts, asset encumbrances and corporate obligations.
Users can verify balances through zk-STARK proofs
OKX uses zk-STARK technology to let users confirm their balances were included in its liability calculations without publicly exposing individual account information. The system combines zero-knowledge proofs with Merkle-tree data and published wallet addresses.
Users can download an inclusion proof from their OKX account and run the exchange’s open-source zk-STARK validator. OKX says the tool can test whether a user’s balance was included and separately verify total-balance and non-negative-balance constraints.
For reserve assets, OKX publishes wallet-address files that allow users to check signatures and balances against the blockchain. Its reserve methodology compares the total amount in verified on-chain wallets with the account assets included in its liability proof.
The exchange’s download page lists the Sept. 8 report under ID 502299735 using zk-STARK v2 for both reserve and liability files. Previous downloadable snapshots are dated Aug. 11, July 7, June 19, May 7, April 20 and March 3.
OKX describes each report as a point-in-time snapshot, meaning transactions completed after the capture date are not part of that report. Its published schedule shows repeated reserve snapshots across 2026, though the exchange has not listed a date for the next report on the current download page.
