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- Coinbase launched Proof of Reserves for cbBTC, but transparency concerns remain.
- Critics worry about centralization and Coinbase’s liquidity issues.
Coinbase has introduced a Proof of Reserves (PoR) system for its wrapped Bitcoin token, cbBTC, to enhance transparency and assure users that each cbBTC is fully backed by Bitcoin (BTC). The Bitcoin community continues to express worry about centralized control and custodial asset risks while Coinbase introduces PoR systems for cbBTC.
PoR data from Coinbase shows the exchange maintains 26,525.15 BTC reserves, representing the entire 26,461.05 cbBTC supply. The cbBTC supply exists through 16,080 cbBTC on Ethereum, 7,655.391 cbBTC on Base, 2,673.489 cbBTC on Solana, and 51.395 cbBTC on Arbitrum.
Coinbase’s transparency measures include disclosing Bitcoin addresses where reserves are specifically stored. The wallet containing the biggest amount of BTC has 690 Bitcoins, which currently have an estimated value of $65.8 million. Additionally, 40 wallets hold 480.984 BTC, with the remaining funds spread across multiple other addresses.
PoR serves as a measure to combat concerns among industry stakeholders about cbBTC security and backing mechanisms. Coinbase wants to reassure users about the wrapped Bitcoin token by revealing reserve holdings.
Industry Criticism and User Concerns
The decision to implement PoR follows criticism from key figures in the crypto space. Tron founder Justin Sun previously criticized cbBTC for lacking clear reserve verification and auditing and potentially locking user funds, raising industry concerns. According to Sun, the token’s centralized design exposes it to potential asset seizure measures that governments might enforce.
#cbbtc lacks Proof of Reserve, no audits, and can freeze anyone's balance anytime. Essentially, it’s just 'trust me.' Any U.S. government subpoena could seize all your BTC. There’s no better representation of central bank Bitcoin than this. It’s a dark day for BTC.
— H.E. Justin Sun 🍌 (@justinsuntron) September 12, 2024
Some users remain skeptical about Coinbase’s proof of reserves after its public announcement. One user on the X platform identified different statements Coinbase had made about its Proof of Reserves. Reports surfaced about transaction delays exceeding 14 hours, leading to speculation that the exchange was staking users’ SOL without their consent.
A user accused Coinbase of making customers’ deposits available for staking rewards, resulting in decreased platform liquidity while users tried to withdraw their funds simultaneously. The company replied that the explanation for system delays came from technical problems with blockchain, stating users’ assets were not misused. Conflicting beliefs about platform liquidity competence continued to surface even after Coinbase explained its activities.
Calls for Greater Transparency
While Coinbase’s implementation of PoR for cbBTC marks a step toward increased transparency, questions remain about the broader accountability of centralized exchanges. Users insist on evidence that verifies asset liquidity so they can ensure funds exist only for storage functions and not other activities.
The emerging transparency movement is a reaction to historical industry occurrences that revealed centralized platforms’ misuse of funds, resulting in major user losses. Continued industry monitoring reveals that PoR programs assist in trust restoration but fail to address users’ complete issues.
