QED
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QED certificate

QED record f534c19890ba from . View the live pool page.

Verified · Ondo USO

Does USOon / USDC match its issuer's published contract?

The pool's quote contract matches Ondo's registry entry for USO.

Verified means the observed quote-token contract matches an issuer-published registry entry on Ethereum. Only the quote-side contract is checked.

This does not prove backing, custody, reserves, price, safety, solvency, or endorsement.

Signature valid · contract match

Ethereum Uniswap v4
Subject
USOon / USDC · Ethereum
Pool address
0x372aaa0dcd79c82516055d39cf94414e73a58b9a4ee3ba241e90f8e030b24466
Issuer match
Ondo · USO · View USO contracts
Checked
Valid until
Serial
f534c19890ba
Signed by
QED (key id GJWKkiUd)

After this time the certificate remains a historical record, but it no longer establishes current pool or registry state. Re-check to create a fresh observation before relying on current facts.

Compare this address with the one you were given before you trade.

0.02% Checked

Only trust an address you pasted here or opened from this page.

How to verify this yourself

QED signs a canonical JSON payload. Fetch the public key from /.well-known/qed.json, then check the signature against this payload.

Canonical JSON
{"block":26221432,"chain":"ethereum","checked_at":"2026-10-18T19:07:01Z","dev":false,"expires_at":"2026-10-19T19:07:01Z","issuer":"Ondo","pool":{"base":{"address":"0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","balance":"4057929354455233913","decimals":18,"symbol":"USOon"},"chain":"ethereum","dex":"uniswap-v4","pool":"0x372aaa0dcd79c82516055d39cf94414e73a58b9a4ee3ba241e90f8e030b24466","quote":{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balance":"667919734","decimals":6,"symbol":"USDC"}},"quote_share_of_supply":0.00018033469987859828,"reads":[{"block":null,"method":"eth_call","params":["0xbd216513d74c8cf14cf4747e6aaa6420ff64ee9e","poolKeys","0x372aaa0dcd79c82516055d39cf94414e73a58b9a4ee3ba241e"],"raw_result":"Object {\"currency0\": String(\"0x1f5fc5c3c8b0f15c7e21af623936ff2b210b6415\"), \"currency1\": String(\"0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48\"), \"fee\": String(\"3000\"), \"hooks\": String(\"0x0000000000000000000000000000000000000000\"), \"tickSpacing\": String(\"60\")}","result_hash":"584e3e3d65b4b67ad5f9f7aba3cd56ce8984148f68ff0ecaa37aeba4f55faa1b","slot":null},{"block":null,"method":"eth_call","params":["0x7ffe42c4a5deea5b0fec41c94c136cf115597227","getSlot0","0x372aaa0dcd79c82516055d39cf94414e73a58b9a4ee3ba241e90f8e030b24466"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x7ffe42c4a5deea5b0fec41c94c136cf115597227","getLiquidity","0x372aaa0dcd79c82516055d39cf94414e73a58b9a4ee3ba241e90f8e030b24466"],"raw_result":"52061224520404","result_hash":"8bfe774c483bf3d18b9d9247a2d6d8d0582a8f057ef57a7a725ff1d983261111","slot":null},{"block":null,"method":"eth_call","params":["0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","symbol()"],"raw_result":"Some(\"USOon\")","result_hash":"d3b147844c3d656f4e27b8fd00f492b3177fbdbf0ea6a66d5d9f74d570e38cab","slot":null},{"block":null,"method":"eth_call","params":["0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":26221432,"method":"eth_blockNumber","params":[],"result_hash":"666b67f352a4804404bb62e332692dfd79efd34896a4aa2db39beb7de423d347","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","name()"],"raw_result":"Some(\"USD Coin\")","result_hash":"fe94af15dc887a2c9df1fb0d6d276e6c586ca9d430ffeac0d05e4baee0637fd1","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","totalSupply()"],"raw_result":"Some(\"48216019267481551\")","result_hash":"bca60e93fc570735ddfd040f3b46bc83bb8f3512a98f9d8099c86bbfa91a78c4","slot":null},{"block":null,"method":"eth_call","params":["0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","symbol()"],"raw_result":"Some(\"USOon\")","result_hash":"d3b147844c3d656f4e27b8fd00f492b3177fbdbf0ea6a66d5d9f74d570e38cab","slot":null},{"block":null,"method":"eth_call","params":["0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","name()"],"raw_result":"Some(\"United States Oil Fund (Ondo Tokenized)\")","result_hash":"6382a3ae9f4abe1e1b50695243281cc4885d07b8355fae44235684091ca624b8","slot":null},{"block":null,"method":"eth_call","params":["0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","totalSupply()"],"raw_result":"Some(\"22502210374304228738045\")","result_hash":"cdf8a91f4196ad85b09ee0c79c2a65a35ed9339488fe148b2646d6b2831eea5b","slot":null},{"block":null,"method":"eth_getCode","params":["0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null},{"block":null,"method":"eth_getCode","params":["0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","latest"],"result_hash":"8538a8190a64db88a5e0ec4c95f0129f9eecd6f3a3aacb869262b82d01d123ec","slot":null}],"registry_entry":{"chain":"ethereum","contract":"0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","decimals":null,"issuer":"Ondo","last_checked":"2026-10-18T18:54:11Z","name":"United States Oil Fund (Ondo Tokenized)","official_deployments":[{"address":"0x1F5fc5c3c8B0F15c7E21AF623936FF2b210b6415","network":"Ethereum"},{"address":"0x94174e3D1335db402dD03A092f7aA7ac2cb32be4","network":"BNB Chain"},{"address":"rpydAzWdCy85HEmoQkH5PVxYtDYQWjmLxgHHadxondo","network":"Solana"},{"address":"0xA4dB50bB345151f3649539300523e83a8b8A6BC7","network":"HyperEVM"}],"source":"https://docs.ondo.finance/addresses.md","source_url":"https://www.dropbox.com/scl/fi/qjfxyg748mx0dwi6up86d/EXTERNAL-Ondo-GM-Tokens-Ondo-GM-Tokens.csv?rlkey=n3no1w78wrah3umsl0nr9s77i&e=2&st=spdit2q1&dl=1","ticker":"USO"},"registry_hash":"e40a8f7ec2f1a2c1d6467a45e0976602299513549c0406d646df02a3ecb928c8","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x372aaa0dcd79c82516055d39cf94414e73a58b9a4ee3ba241e90f8e030b24466","ticker":"USO","verdict":{"Verified":{"issuer":"Ondo","ticker":"USO"}},"version":1}
Signature
Zc2ZHS7S/D+hla5pljA2ZTmw9hxCD9Wu6thayhOIXLeR8RXHfxsXUwkoYwA0bSgtzj+aNWkjUhD8o71O8/HHBA==
API call
GET /api/attest/f534c19890ba2efbbf29e84154cb8bb2b9d787ced9a892668683a3afdf474aa6
  1. Fetch the public key and attestation JSON, then verify the signature with the published key.
  2. Canonicalize the payload with sorted object keys and no whitespace, then verify its SHA-256 attestation id.
  3. Run the API call above and compare the returned payload, serial, signer, and signature with this certificate.