QED
My Wallet
← Back to validated

QED certificate

QED record dfc4ec0da8e1 from . View the live pool page.

Verified · Backed xStocks SPY

USDC/SPYx

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

contract match only, not proof of backing or custody, reserves, price, or endorsement

Signature valid · contract match

BNB Chain Uniswap v2
Subject
USDC/SPYx · BNB Chain
Pool address
0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c
Issuer match
Backed xStocks · SPY · View SPY contracts
Checked
Valid until
Serial
dfc4ec0da8e1
Signed by
QED (key id GJWKkiUd)

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":125425385,"chain":"Bnb","checked_at":"2026-10-03T05:05:57Z","dev":false,"expires_at":"2026-10-04T05:05:57Z","issuer":"Backed xStocks","pool":{"base":{"address":"0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d","balance":"452863303311255","decimals":18,"symbol":"USDC"},"chain":"Bnb","dex":"uniswap-v2","pool":"0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","quote":{"address":"0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","balance":"1552424539819","decimals":18,"symbol":"SPYx"}},"quote_share_of_supply":1.5436035244206243e-10,"reads":[{"block":null,"method":"eth_getCode","params":["0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","latest"],"result_hash":"1c9409806518d1a5f52d79299ea0289ea2ff527e05895cd8f7a36d4cca28a13e","slot":null},{"block":null,"method":"eth_getCode","params":["0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","latest"],"result_hash":"1c9409806518d1a5f52d79299ea0289ea2ff527e05895cd8f7a36d4cca28a13e","slot":null},{"block":null,"method":"eth_getCode","params":["0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","latest"],"result_hash":"1c9409806518d1a5f52d79299ea0289ea2ff527e05895cd8f7a36d4cca28a13e","slot":null},{"block":null,"method":"eth_getCode","params":["0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","latest"],"result_hash":"1764b422d6d1f1669e2da9e68383b26e1a82638e0137f03d7f92cc593694dc3e","slot":null},{"block":125425385,"method":"eth_blockNumber","params":[],"result_hash":"ef423054974d4ab56f1d249d94d7657a25dff327589f6182ed1fa8b9bfea64ed","slot":null},{"block":null,"method":"eth_call","params":["0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","token0()"],"raw_result":"0x8ac76a51cc950d9822d68b83fe1ad97b32cd580d","result_hash":"424d2bace0b0ed07b1b8b1ffcde822b5bf8fb778b9576ac91a29044e745e08f9","slot":null},{"block":null,"method":"eth_call","params":["0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","token1()"],"raw_result":"0x90a2a4c76b5d8c0bc892a69ea28aa775a8f2dd48","result_hash":"cea64c28d119727097c6477c099ad4a765988e1cd2c523476d2d061294a1ad23","slot":null},{"block":null,"method":"eth_call","params":["0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","getReserves()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d","balanceOf","0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c"],"raw_result":"Some(\"452863303311255\")","result_hash":"cde8f7f31f970a41663ad377fe83afa28ae70a5d995a3160f98e720a81d9929a","slot":null},{"block":null,"method":"eth_call","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","symbol()"],"raw_result":"Some(\"SPYx\")","result_hash":"de41d2c14fa73c8e3ea34e4093b99a9165ac26bef56a7d98b711bdb990d48466","slot":null},{"block":null,"method":"eth_call","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","balanceOf","0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c"],"raw_result":"Some(\"1552424539819\")","result_hash":"bf6aef5e755bc94ed185b5d91abbb7fb62c3f1d4505558b89dd7f09a2e76bc18","slot":null},{"block":null,"method":"eth_call","params":["0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d","symbol()"],"raw_result":"Some(\"USDC\")","result_hash":"a3c9e246b0832b52e41efce041d8614251f5e288cdd4b192e85bfd3dfcb748ff","slot":null},{"block":null,"method":"eth_call","params":["0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d","name()"],"raw_result":"Some(\"USD Coin\")","result_hash":"fe94af15dc887a2c9df1fb0d6d276e6c586ca9d430ffeac0d05e4baee0637fd1","slot":null},{"block":null,"method":"eth_call","params":["0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x8AC76a51cc950d9822D68b83fE1Ad97B32Cd580d","totalSupply()"],"raw_result":"Some(\"1588999877439803986446539541\")","result_hash":"a30c1d43fabceb84630ef9005b0a2d92f1cf968832dce3f94a703b50f7d3caea","slot":null},{"block":null,"method":"eth_call","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","symbol()"],"raw_result":"Some(\"SPYx\")","result_hash":"de41d2c14fa73c8e3ea34e4093b99a9165ac26bef56a7d98b711bdb990d48466","slot":null},{"block":null,"method":"eth_call","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","name()"],"raw_result":"Some(\"SP500 xStock\")","result_hash":"79ea6335245c40c23594121bcd21ed9b06c5de3e2a3ad3ae9b0b706bd912711d","slot":null},{"block":null,"method":"eth_call","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","totalSupply()"],"raw_result":"Some(\"10057145602862540000000\")","result_hash":"3841e8a50d654f23837e9ac3473ea167f6046c5e0aeec925de4abeeda7bffd61","slot":null},{"block":null,"method":"eth_getCode","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null},{"block":null,"method":"eth_getCode","params":["0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null}],"registry_entry":{"chain":"Bnb","contract":"0x90A2a4c76b5D8c0bc892A69EA28Aa775a8f2dD48","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-10-03T04:09:51Z","name":"SP500","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"SPY"},"registry_hash":"69180a9d1971ea57866162e5b63d14efc237bb578c5e9f857f46f52069325ecf","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xA42B9bcF5D40348D04C8Ef139E213bc4923f8E8c","ticker":"SPY","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"SPY"}},"version":1}
Signature
VQj8vnYja7/E1UxdFpTbsgI3NwIC8tLxXjTsh+hnnQTd/e2ykdKkIIhfv+XKdApJsncXZeRGLc7ZVgyb9QIQBg==
API call
GET /api/attest/dfc4ec0da8e1473b030978f62f6faf1ab980a7c093a3c00cacb90cad8441b1a6
  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.