Poco/XIAOx

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":126030636,"chain":"Bnb","checked_at":"2026-10-06T08:47:35Z","dev":false,"expires_at":"2026-10-07T08:47:35Z","issuer":"Backed xStocks","pool":{"base":{"address":"0xa5BCA432c26E0BE56aDF50D6F31923Db4b4A4B8d","balance":"999999184465952849706100556","decimals":18,"symbol":"Poco"},"chain":"Bnb","dex":"pancake-v3","pool":"0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","quote":{"address":"0xfb4f81f511b40b80996062032260A539E60aDFc0","balance":"6280679824462078","decimals":18,"symbol":"XIAOx"}},"quote_share_of_supply":6.296984821791006e-9,"reads":[{"block":null,"method":"eth_getCode","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","latest"],"result_hash":"1c9409806518d1a5f52d79299ea0289ea2ff527e05895cd8f7a36d4cca28a13e","slot":null},{"block":null,"method":"eth_getCode","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","latest"],"result_hash":"1c9409806518d1a5f52d79299ea0289ea2ff527e05895cd8f7a36d4cca28a13e","slot":null},{"block":null,"method":"eth_getCode","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","latest"],"result_hash":"1c9409806518d1a5f52d79299ea0289ea2ff527e05895cd8f7a36d4cca28a13e","slot":null},{"block":null,"method":"eth_getCode","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","latest"],"result_hash":"0c3cda7f40bd03e960c537cc56dca5d0881540a4af7fe8fb32c7900516c3b00f","slot":null},{"block":126030636,"method":"eth_blockNumber","params":[],"result_hash":"63876a157d3b65cdef4a13a65fbb0771e92303cb06220d1a2610ccdc65eb9111","slot":null},{"block":null,"method":"eth_call","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","token0()"],"raw_result":"0xa5bca432c26e0be56adf50d6f31923db4b4a4b8d","result_hash":"c92447b3d8647183e8aa5213a85931ddca7556e05cc0b58b0cf497e7de458c69","slot":null},{"block":null,"method":"eth_call","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","token1()"],"raw_result":"0xfb4f81f511b40b80996062032260a539e60adfc0","result_hash":"5a35fba213de7605c07e7c6c0dfee49aa465d7c0a55bbc3ccb092109fff9b691","slot":null},{"block":null,"method":"eth_call","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","factory()"],"raw_result":"Some(0x0bfbcf9fa4f9c56b0f40a671ad40e0805a091865)","result_hash":"da1f4544b9417a11911907f7a632e9c00b511a10bfd124a8879882f21abb2fe7","slot":null},{"block":null,"method":"eth_call","params":["0xa5BCA432c26E0BE56aDF50D6F31923Db4b4A4B8d","symbol()"],"raw_result":"Some(\"Poco\")","result_hash":"9c158a30389c84644e9b03d37524768b442c45bcb873afa7d3912bfc198bc59e","slot":null},{"block":null,"method":"eth_call","params":["0xa5BCA432c26E0BE56aDF50D6F31923Db4b4A4B8d","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xa5BCA432c26E0BE56aDF50D6F31923Db4b4A4B8d","balanceOf","0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf"],"raw_result":"Some(\"999999184465952849706100556\")","result_hash":"27df77bf609d91d29e4445c603542ffc6bfb225b09d06b9d463c763a50f17617","slot":null},{"block":null,"method":"eth_call","params":["0xfb4f81f511b40b80996062032260A539E60aDFc0","symbol()"],"raw_result":"Some(\"XIAOx\")","result_hash":"04f1eefa165f4f6583bdf5ea22fc8ecb6df01001037c9a7033a2e862049b7ef6","slot":null},{"block":null,"method":"eth_call","params":["0xfb4f81f511b40b80996062032260A539E60aDFc0","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xfb4f81f511b40b80996062032260A539E60aDFc0","balanceOf","0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf"],"raw_result":"Some(\"6280679824462078\")","result_hash":"1e30430faabbe058dd8ef0d47a77a5466313edf9bcafe041bb9e7a8d79ba98c5","slot":null},{"block":null,"method":"eth_call","params":["0xa5BCA432c26E0BE56aDF50D6F31923Db4b4A4B8d","symbol()"],"raw_result":"Some(\"Poco\")","result_hash":"9c158a30389c84644e9b03d37524768b442c45bcb873afa7d3912bfc198bc59e","slot":null},{"block":null,"method":"eth_call","params":["0xa5BCA432c26E0BE56aDF50D6F31923Db4b4A4B8d","name()"],"raw_result":"Some(\"Poco\")","result_hash":"9c158a30389c84644e9b03d37524768b442c45bcb873afa7d3912bfc198bc59e","slot":null},{"block":null,"method":"eth_call","params":["0xa5BCA432c26E0BE56aDF50D6F31923Db4b4A4B8d","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xa5BCA432c26E0BE56aDF50D6F31923Db4b4A4B8d","totalSupply()"],"raw_result":"Some(\"1000000000000000000000000000\")","result_hash":"9a5063c327faec672db6b50450571675cbfbcc3766ebaf6832c3a9f6636ff4d0","slot":null},{"block":null,"method":"eth_call","params":["0xfb4f81f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xStock\")","result_hash":"d8b79368eceeeb42eae69bc267d499cdf644948c249ae84b9e541dd8a5d0594a","slot":null},{"block":null,"method":"eth_call","params":["0xfb4f81f511b40b80996062032260A539E60aDFc0","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xfb4f81f511b40b80996062032260A539E60aDFc0","totalSupply()"],"raw_result":"Some(\"997410665931335288132000\")","result_hash":"50f2a3c3c7aecb5a7da81f15f1794d234e382fe82a8ad6798dda81c83e20c320","slot":null},{"block":null,"method":"eth_getCode","params":["0xfb4f81f511b40b80996062032260A539E60aDFc0","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null},{"block":null,"method":"eth_getCode","params":["0xfb4f81f511b40b80996062032260A539E60aDFc0","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null}],"registry_entry":{"chain":"Bnb","contract":"0xfb4f81f511b40b80996062032260A539E60aDFc0","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-10-06T08:14:21Z","name":"Xiaomi","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"1810"},"registry_hash":"496d113bf5e859d5f2bdc3626d412642074a2f502443efe6bec6c615c671056d","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xbde3B182B6067De89827C9CAe1080BEF932Bf0Cf","ticker":"1810","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"1810"}},"version":1}

Signature

I4Reo3n4W72oQ4dLT6FqI0UtIu8BbxzCMTmcMeG/3cFdXXrlkymYgnEZdVdlZZEIah228Q29z65Kvv0IOdWdCA==

API call

GET /api/attest/27c18b9db15414e5a25f646f82a43007e63fc9c6bc4f49ed2ba8a84c7297c4e6

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.