SPCXx/GOOGLon

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":26086682,"chain":"Ethereum","checked_at":"2026-09-30T00:23:06Z","dev":false,"expires_at":"2026-10-01T00:23:06Z","issuer":"Backed xStocks","pool":{"base":{"address":"0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","balance":"13758174722763336009","decimals":18,"symbol":"SPCXx"},"chain":"Ethereum","dex":"uniswap-v3","pool":"0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","quote":{"address":"0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","balance":"8800715437493934415","decimals":18,"symbol":"GOOGLon"}},"quote_share_of_supply":0.000042994296008635425,"reads":[{"block":null,"method":"eth_getCode","params":["0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","latest"],"result_hash":"1c9409806518d1a5f52d79299ea0289ea2ff527e05895cd8f7a36d4cca28a13e","slot":null},{"block":null,"method":"eth_getCode","params":["0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","latest"],"result_hash":"1c9409806518d1a5f52d79299ea0289ea2ff527e05895cd8f7a36d4cca28a13e","slot":null},{"block":null,"method":"eth_getCode","params":["0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","latest"],"result_hash":"80351c09f46f5ba1e27e658a609150a6fb9785e0ca7bd0ecea6212e4a57ea7d7","slot":null},{"block":26086682,"method":"eth_blockNumber","params":[],"result_hash":"d0fae7bff23c33718d4e48059213f722d9260bcf7626c6d56271cb17604b70e6","slot":null},{"block":null,"method":"eth_call","params":["0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","token0()"],"raw_result":"0x68fa48b1c2fe52b3d776e1953e0e782b5044ce28","result_hash":"7026d35b349fb3ae6aeb1941c7ca31f197ef75d99776e799ff166b519319b6ad","slot":null},{"block":null,"method":"eth_call","params":["0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","token1()"],"raw_result":"0xba47214edd2bb43099611b208f75e4b42fdcfedc","result_hash":"3f0aff5cb0c761185c1e45d536f8974b5f6eeb6fb60467e361d5abb6fe85b877","slot":null},{"block":null,"method":"eth_call","params":["0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","factory()"],"raw_result":"Some(0x1f98431c8ad98523631ae4a59f267346ea31f984)","result_hash":"9b44ff123ef94b4ea3bad901278f92c6e65288f31af4d3eaff07b493d1a79084","slot":null},{"block":null,"method":"eth_call","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","symbol()"],"raw_result":"Some(\"SPCXx\")","result_hash":"965a6f237aaee688ad603e4d33f980be96f2d8a203b54e7af87e31a5fa74821b","slot":null},{"block":null,"method":"eth_call","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","balanceOf","0x1f5D68A87847A122684BB456e44E3A522A4AfcC0"],"raw_result":"Some(\"13758174722763336009\")","result_hash":"b34522e7e0280b40590b2907994a122c0cc4ebe4db21d65ff37e4383f76481eb","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","symbol()"],"raw_result":"Some(\"GOOGLon\")","result_hash":"5f0da529cc5c6a9b601a92dbb9ddd08f3c411dfe3510345cfcd1dfea7608ef98","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","balanceOf","0x1f5D68A87847A122684BB456e44E3A522A4AfcC0"],"raw_result":"Some(\"8800715437493934415\")","result_hash":"8414e220fa86b098da144e5be0121f7a6dde028d0a938b5aece255fc8b2da5f9","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","symbol()"],"raw_result":"Some(\"GOOGLon\")","result_hash":"5f0da529cc5c6a9b601a92dbb9ddd08f3c411dfe3510345cfcd1dfea7608ef98","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","name()"],"raw_result":"Some(\"Alphabet Class A (Ondo Tokenized)\")","result_hash":"fe13bb1d7daa6ed02f005adb2079e56324ed37c2a4d6694e82a1699e811c4b4f","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xbA47214eDd2bb43099611b208f75E4b42FDcfEDc","totalSupply()"],"raw_result":"Some(\"30616674130197881441960\")","result_hash":"a5f98e0936c5c73e657c0981b66fece99b76083b914929696498f17e888c2311","slot":null},{"block":null,"method":"eth_call","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","symbol()"],"raw_result":"Some(\"SPCXx\")","result_hash":"965a6f237aaee688ad603e4d33f980be96f2d8a203b54e7af87e31a5fa74821b","slot":null},{"block":null,"method":"eth_call","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","name()"],"raw_result":"Some(\"SpaceX xStock\")","result_hash":"f3e330aa060e551d81d53f26682fa521fc98ad2f6852293752beef7a3402d2ba","slot":null},{"block":null,"method":"eth_call","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","totalSupply()"],"raw_result":"Some(\"320000000000000000000000\")","result_hash":"9664b0ed2b98a8318365abf6cd02d77802f08162fd5e3fee63c8fd850a588667","slot":null},{"block":null,"method":"eth_getCode","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null},{"block":null,"method":"eth_getCode","params":["0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null}],"registry_entry":{"chain":"Ethereum","contract":"0x68fa48B1C2FE52b3D776E1953e0E782b5044Ce28","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-09-29T23:37:23Z","name":"SpaceX","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"SPCX"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0x1f5D68A87847A122684BB456e44E3A522A4AfcC0","ticker":"SPCX","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"SPCX"}},"version":1}

Signature

+jFCxRjZOycUHX0+p8JEszuqFKO4j/AICsX5jbpXJ+AUlRivyOdDQc4KL4DtXUGRb2HqyMke0ByoZymEW795Dg==

API call

GET /api/attest/caea9ff14349da2c4dca5f8686f61fd792faf56d372de128e1b7f6c9d7c35973

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.