QED
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QED certificate

QED record 1324ea5f65e3 from . View the live pool page.

Verified · Backed xStocks NVDA

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

The pool's quote contract matches Backed xStocks's registry entry for NVDA.

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 v2
Subject
NVDAx / USDC · Ethereum
Pool address
0xF6F9849752eaE1018E4263D598147f0420a3F3a3
Issuer match
Backed xStocks · NVDA · View NVDA contracts
Checked
Valid until
Serial
1324ea5f65e3
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.

under 0.01% 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":26227542,"chain":"ethereum","checked_at":"2026-10-19T15:33:21Z","dev":false,"expires_at":"2026-10-20T15:33:21Z","issuer":"Backed xStocks","pool":{"base":{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balance":"114390","decimals":6,"symbol":"USDC"},"chain":"ethereum","dex":"uniswap-v2","pool":"0xF6F9849752eaE1018E4263D598147f0420a3F3a3","quote":{"address":"0xc845b2894dBddd03858fd2D643B4eF725fE0849d","balance":"526545594464634","decimals":18,"symbol":"NVDAx"}},"quote_share_of_supply":4.7789346528141545e-9,"reads":[{"block":26227542,"method":"eth_blockNumber","params":[],"result_hash":"82daa7dd6a5c1ea1666c923cf37901c6abd8f538224df53cb2e0a89b226eb319","slot":null},{"block":null,"method":"eth_call","params":["0xF6F9849752eaE1018E4263D598147f0420a3F3a3","token0()"],"raw_result":"0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48","result_hash":"6239f262cd1d947b947081c9eba6e8771378942478e1d48654f4f132ebb96021","slot":null},{"block":null,"method":"eth_call","params":["0xF6F9849752eaE1018E4263D598147f0420a3F3a3","token1()"],"raw_result":"0xc845b2894dbddd03858fd2d643b4ef725fe0849d","result_hash":"bdfde775a065b54d39137e053bcab108683e8b85b828d2d667bb2dd99c1a5a27","slot":null},{"block":null,"method":"eth_call","params":["0xF6F9849752eaE1018E4263D598147f0420a3F3a3","getReserves()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xF6F9849752eaE1018E4263D598147f0420a3F3a3","factory()"],"raw_result":"0x5c69bee701ef814a2b6a3edd4b1652cb9cc5aa6f","result_hash":"18a8d1702c789fb4aa6e115c7039ec7b99240285e6533e2bd0c0f87452aa99e4","slot":null},{"block":null,"method":"eth_call","params":["0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f","getPair","0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","0xc845b2894dBddd03858fd2D643B4eF725fE0849d"],"raw_result":"0xf6f9849752eae1018e4263d598147f0420a3f3a3","result_hash":"44a46a1e5f4268f83c3e34f5eb4d037ce38218e6c565f5a6cc421662001eb52d","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":null,"method":"eth_call","params":["0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balanceOf","0xF6F9849752eaE1018E4263D598147f0420a3F3a3"],"raw_result":"Some(\"114390\")","result_hash":"5d9efebf55b6dc3333e70a97bf2e073f798acbc25c4c8dd54cd369ed716dab47","slot":null},{"block":null,"method":"eth_call","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","symbol()"],"raw_result":"Some(\"NVDAx\")","result_hash":"44a9ba3ab933ba0bcca60212d5e935024e6f02408c93dfe1d02d7879e0fbdfb8","slot":null},{"block":null,"method":"eth_call","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","balanceOf","0xF6F9849752eaE1018E4263D598147f0420a3F3a3"],"raw_result":"Some(\"526545594464634\")","result_hash":"7eaf8ebb9d25fa5c06b5ac5901c93353e5eaba0fff8bab5dc5a88f19088e8d0b","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(\"47997509267078458\")","result_hash":"712d2d2d774ae31faefabf42357bfe5025b7e1d488d12adb504ec262d20724a8","slot":null},{"block":null,"method":"eth_call","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","symbol()"],"raw_result":"Some(\"NVDAx\")","result_hash":"44a9ba3ab933ba0bcca60212d5e935024e6f02408c93dfe1d02d7879e0fbdfb8","slot":null},{"block":null,"method":"eth_call","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","name()"],"raw_result":"Some(\"NVIDIA xStock\")","result_hash":"756b99cba5054e3b45d0fb189091448e7ca402fd361b42f7f9fa604d1aa56c15","slot":null},{"block":null,"method":"eth_call","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","totalSupply()"],"raw_result":"Some(\"110180538701145229619549\")","result_hash":"19847979029ee2b3845e120742b08012e5850a4d2b0ebb98b2cc784798034a46","slot":null},{"block":null,"method":"eth_getCode","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null},{"block":null,"method":"eth_getCode","params":["0xc845b2894dBddd03858fd2D643B4eF725fE0849d","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null}],"registry_entry":{"chain":"ethereum","contract":"0xc845b2894dBddd03858fd2D643B4eF725fE0849d","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-10-19T14:40:19Z","name":"NVIDIA","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"NVDA"},"registry_hash":"92e84a5097c412088157ecc6f5394b143eea965b7cf43a01187023b0d9844862","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xF6F9849752eaE1018E4263D598147f0420a3F3a3","ticker":"NVDA","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"NVDA"}},"version":1}
Signature
u+zGfLVSUD864rJkpQyIdrgyPRM5rgpXx3YygPaNoqWpTBU8wpnV6rNjJEvfCVa0x/1O41KFyDWVFo/LG65vAw==
API call
GET /api/attest/1324ea5f65e3970d38b0ed887d14a2f87bf214dd019df5f0ac444aaab8bb7764
  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.