Chronicle oracle

Chronicle is an independent verification infrastructure provider that was founded within MakerDAO and built the first oracle on Ethereum. MakerDAO is now called Sky. Chronicle Labs runs the network today, and its founder is Niklas Kunkel. Chronicle has been in production for more than eight years. Backers include Sky co-founder Rune Christensen and Aave founder Stani Kulechov .

The prices are signed by validators, and documentation from Chronicle names them: MakerDAO, Infura, Gitcoin, Etherscan, DeFi Saver, Gnosis, Nethermind, Euler, Mantle, ETH Global, Steakhouse Financial, Bitcoin Suisse and Block Analitica. A protocol that reads a Chronicle feed therefore trusts a known group of firms from the Ethereum world, each running its own node. For the wider field and how Chronicle compares with other networks, see the list of top oracle networks.

Chronicle also verifies the assets held by tokenized investment funds. A tokenized fund holds Treasury bills, repos or loans offchain, and the numbers that describe them come from custodians and fund administrators. Chronicle Proof of Asset collects those holdings reports at agreed intervals, checks them and publishes the result onchain with a cryptographic proof. Chronicle reports $5.3 billion of tokenized value secured this way across 15 verified funds.

The USD Institutional Digital Liquidity Fund (BUIDL) from BlackRock, the largest tokenized Treasury fund with about $1.7 billion in Treasuries, overnight repos and cash, added Chronicle Proof of Asset to publish independently verified holdings data, as Daniel Kuhn reports in The Block. The same article names the Anemoy Treasury Fund (JTRSY) from Janus Henderson and USTB from Superstate among the funds Chronicle covers. For the tokenized AAA CLO fund STAC from Securitize, Chronicle verifies holdings and net asset value, while BNY is custodian and sub-advisor.

A reserve attestation is a point-in-time snapshot. The Proof of Asset service from Chronicle is an ongoing reconciliation between onchain balances and offchain accounting. The model also reaches credit. In a $500 million warehouse facility from Grove for Galaxy Digital, Chronicle reads collateral balances from the custodians Anchorage Digital and BitGo and loan positions from the servicer, then recomputes loan-to-value on every update so margin-call thresholds can be checked at any time (Chronicle blog). More on the fund side: tokenized funds and RWA tokenization.

Chronicle is a push oracle: each validator queries its sources and signs a price, and a relay posts the median onchain. An update fires when the offchain price moves more than a set deviation threshold, or when a set time has passed since the last update. The value then sits in the oracle contract, and any whitelisted contract can read it in the same block.

Scribe is the contract design that keeps this affordable. Older oracles checked one signature per validator, so more validators meant higher gas costs. Scribe aggregates the validators' Schnorr signatures into a single signature, and the cost of an update stays nearly constant; Chronicle states savings of more than 60 percent against competing oracles. Chronicle data feeds cover more than 1,500 crypto assets, tokenized assets, equities and yield-bearing instruments.

Contracts from Chronicle are read-protected by a whitelist: on testnets a developer whitelists their own address, on mainnet a protocol applies through a form. For institutional reference rates and exchange data used by banks and fund managers, see the crypto price feed providers.

On oracle ranking from DefiLlama, Chronicle is the second-largest oracle network by total value secured (TVS), with $5.15 billion across 13 protocols (September 2026). Chronicle data from DefiLlama records that Sky alone accounts for 58.8 percent, followed by the lending market SparkLend with $1.87 billion and the stablecoin issuer M0 with $203 million. Risk curators such as Steakhouse Financial and Gauntlet appear with smaller amounts. DefiLlama lists Chronicle on Ethereum, Arbitrum, Berachain, Mantle, Tempo and Monad.

Chronicle reports a higher total of $10.5 billion and lists its tokenized fund value separately. DefiLlama adds up only the value locked in the DeFi protocols that read a feed. Chronicle data feeds cover 18 blockchains, among them Ethereum, Arbitrum, Base, Avalanche, Gnosis, Optimism, Linea, Scroll, zkSync and Plume.

The first risk is concentration. With Sky and Spark behind most of the value, an error in a Chronicle feed would hit the Sky ecosystem first, and a protocol outside it should ask how fast Chronicle adds new assets and chains. The second is stale data. documentation from Chronicle warns that a contract that skips a freshness check may act on outdated data, and it offers readWithAge() so a protocol can reject a price older than its own limit.

A risk team reviewing Chronicle can work through a short list: the data model of each feed and its sources on the Chronicle Dashboard, the deviation and time thresholds against the protocol's liquidation logic, the validator set, and the gap between the TVS Chronicle reports and the figure DefiLlama shows. For Proof of Asset feeds, the dashboard shows the holdings and who signed them when, so an allocator can compare them with the fund's own reports. What can go wrong with oracles in general is on the oracle networks page.

Oracle networks are part of the Investment & Digital Assets track of Finance Loop. Finance Loop held a panel on decentralized oracle networks for smart contracts in Frankfurt as a pre-event of the Crypto Assets Conference of Frankfurt School and Deutsche Börse, and its events cover the lending markets that read these feeds, from DeFi lending to DeFi in Germany. Dates are in the event calendar.

Chronicle is the team and network that grew out of the MakerDAO oracle. documentation from Chronicle still names MakerDAO as a validator and uses MakerDAO as the example of a protocol that prices borrowers' deposits with Chronicle feeds. Since MakerDAO became Sky, Sky is the largest user of Chronicle by value secured.

Chronicle Proof of Asset is a verification service for tokenized funds and other digital asset products. Chronicle takes holdings data from custodians and fund administrators, checks it, and publishes the composition, valuation, liquidity and yield onchain, so an investor or a lending protocol can see what backs a token at any time.

Chronicle uses a push model: validators sign prices, and an update is written onchain when the price moves past a deviation threshold or a set time has passed. A pull oracle such as RedStone signs data offchain and lets the application bring it onchain with its own transaction.