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

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":26272444,"chain":"ethereum","checked_at":"2026-10-25T21:41:24Z","dev":false,"expires_at":"2026-10-26T21:41:24Z","issuer":"Backed xStocks","pool":{"base":{"address":"0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48","balance":"2006599","decimals":6,"symbol":"USDC"},"chain":"ethereum","dex":"uniswap-v4","pool":"0xded1ecdb355dfdb9003ae229cdb325791bc45dc92d04dffec9da89d85460b437","quote":{"address":"0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","balance":"1828793492238222022","decimals":18,"symbol":"NFLXx"}},"quote_share_of_supply":0.000016996222046823627,"reads":[{"block":null,"method":"eth_call","params":["0xbd216513d74c8cf14cf4747e6aaa6420ff64ee9e","poolKeys","0xded1ecdb355dfdb9003ae229cdb325791bc45dc92d04dffec9"],"raw_result":"Object {\"currency0\": String(\"0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48\"), \"currency1\": String(\"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961\"), \"fee\": String(\"996757\"), \"hooks\": String(\"0x0000000000000000000000000000000000000000\"), \"tickSpacing\": String(\"19935\")}","result_hash":"ef4a0052cec330c60597a30334501322f787f437e774c5adf8d1b0e61cb55774","slot":null},{"block":null,"method":"eth_call","params":["0x7ffe42c4a5deea5b0fec41c94c136cf115597227","getSlot0","0xded1ecdb355dfdb9003ae229cdb325791bc45dc92d04dffec9da89d85460b437"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0x7ffe42c4a5deea5b0fec41c94c136cf115597227","getLiquidity","0xded1ecdb355dfdb9003ae229cdb325791bc45dc92d04dffec9da89d85460b437"],"raw_result":"1915634887322","result_hash":"d060bc3c0d6a1cf804339840b145f1d141bc92f1cd0865c79d8b4a7b01b79e6e","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":["0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","symbol()"],"raw_result":"Some(\"NFLXx\")","result_hash":"7d19f02ffebdbd5525333f9c915397607ba3c32a6ff3084142c35d3c63cf5bbb","slot":null},{"block":null,"method":"eth_call","params":["0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":26272444,"method":"eth_blockNumber","params":[],"result_hash":"f50d72f933675c65beb45abaf545035e37368fca0557f9cf0879d88974a36147","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(\"47671495800926511\")","result_hash":"079a03e26842f54508f40e32a5f14d1c58269e216cee13c2809a0cbe1afd5075","slot":null},{"block":null,"method":"eth_call","params":["0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","symbol()"],"raw_result":"Some(\"NFLXx\")","result_hash":"7d19f02ffebdbd5525333f9c915397607ba3c32a6ff3084142c35d3c63cf5bbb","slot":null},{"block":null,"method":"eth_call","params":["0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","name()"],"raw_result":"Some(\"Netflix xStock\")","result_hash":"eeb6bbb85a0939ca237aa520bed8d4ce4eb9cfe972a790724f3e8150b4f5183b","slot":null},{"block":null,"method":"eth_call","params":["0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","totalSupply()"],"raw_result":"Some(\"107600000000000000000000\")","result_hash":"77063a06a56efcb9a556e8c0836f47a0c8c7b771bf7f174ff2c9a8f404ec5940","slot":null},{"block":null,"method":"eth_getCode","params":["0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null},{"block":null,"method":"eth_getCode","params":["0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","latest"],"result_hash":"71ee049d0c0cab5d785d7aef2e6b591e511475fb8ef465f4d8f5335bfd412bfd","slot":null}],"registry_entry":{"chain":"ethereum","contract":"0xA6a65AC27E76cD53cB790473E4345c46e5eBf961","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-10-25T21:07:30Z","name":"Netflix","official_deployments":[{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"Ethereum","wrapper_address":"0xfe0d2545f9e7f3678cb35ed3cdf70488c5570d11","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"},{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"BinanceSmartChain","wrapper_address":"0xfe0d2545f9e7f3678cb35ed3cdf70488c5570d11","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"},{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"Arbitrum","wrapper_address":"0xfe0d2545f9e7f3678cb35ed3cdf70488c5570d11","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"},{"address":"XsEH7wWfJJu2ZT3UCFeVfALnVA6CP5ur7Ee11KmzVpL","network":"Solana"},{"address":"TXHYLk7bRiDNF8pbVcsPcDb75w3RSNeJxv","network":"Tron"},{"address":"EQBOkh_7Wk6FlQ6vR03S6BiT3obZ1189MGD16ug3M355Mapq","network":"Ton"},{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"Mantle","wrapper_address":"0xfe0d2545f9e7f3678cb35ed3cdf70488c5570d11","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"},{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"HyperEVM","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"},{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"Ink","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"},{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"XLayer","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"},{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"Optimism","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"},{"address":"0xa6a65ac27e76cd53cb790473e4345c46e5ebf961","network":"Monad","wrapper_address_v2":"0x7d87fd6a379714194a797c0bbb8b40c30d250856"}],"source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"NFLX"},"registry_hash":"76cea31de208d2c5b8204c43ccf8c064187ffea067a1a30eb36fea68f08cee28","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xded1ecdb355dfdb9003ae229cdb325791bc45dc92d04dffec9da89d85460b437","ticker":"NFLX","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"NFLX"}},"version":1}

Signature

HmGDl8aXesU6+0aAbK1nl0PpHOuHkvsIURF3lJHNWCy9nowOCyXaINUfhlv1nYhjgf8rf6Qi7L/YlKzArEp7BQ==

API call

GET /api/attest/0d9580c086ddc03bd43030e47abc8b7f30b10081c2c0d98dc77f6f5838bcb953

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.