{"block":{"chainId":10,"hash":"0x16a3bb999f246e0deb205261cffa8ffcd1663abead5ab94491eea13b2aaf1a0d","number":"149701411","timestamp":1775001599},"call":{"args":[],"data":"0x18160ddd","fn":"totalSupply()","result":"0x0000000000000000000000000000000000000000000000000000a228d694d70d","specId":"erc20.totalSupply","to":"0x0b2c639c533813f4aa9d7837caf62653d097ff85"},"checks":[{"detail":"eth_call totalSupply() at the day's last block, by block number, on one archive RPC provider; responseHash is sha256 of the response text as landed","name":"rpc","status":"pass"},{"detail":"block hash and timestamp from eth_getBlockByNumber at that block number on the same provider","name":"block-header","status":"pass"}],"hash":"0xe58edfaf661acc630067a29db7dfb6dda717e0f9112a7a3cf2c4d938b53bde56","id":"rcpt_e58edfaf661acc630067","kind":"eth_call","lineage":{"inputs":[],"transform":{"expression":"total_supply_raw = uint256(result); total_supply = total_supply_raw / 10^decimals","name":"erc20.totalSupply","version":"1"}},"proofLevel":1,"reproduce":{"cast":"cast call 0x0b2c639c533813f4aa9d7837caf62653d097ff85 \"totalSupply()(uint256)\" --block 149701411 --rpc-url $RPC_URL","curl":"curl -s -X POST \"$RPC_URL\" -H 'content-type: application/json' --data '{\"jsonrpc\":\"2.0\",\"id\":1,\"method\":\"eth_call\",\"params\":[{\"to\":\"0x0b2c639c533813f4aa9d7837caf62653d097ff85\",\"data\":\"0x18160ddd\"},{\"blockHash\":\"0x16a3bb999f246e0deb205261cffa8ffcd1663abead5ab94491eea13b2aaf1a0d\",\"requireCanonical\":true}]}'"},"source":{"endpoint":"conduit","fetchedAt":"2026-10-29T15:22:39.360Z","provider":"Archive RPC node (single provider, via Conduit)","responseHash":"0xc526edf9050287cbc05b9f569f4164632c7b2f8d00c39049fc4967d182f412f6"},"subject":{"label":"USDC totalSupply on OP Mainnet, 2026-03-31 UTC close","unit":"raw","value":"178296282470157"},"v":1}