Does ON / USDG 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":92003165,"chain":"robinhood","checked_at":"2026-10-18T19:04:04Z","dev":false,"expires_at":"2026-10-19T19:04:04Z","issuer":"Robinhood","pool":{"base":{"address":"0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balance":"2823834801","decimals":6,"symbol":"USDG"},"chain":"robinhood","dex":"uniswap-v3","pool":"0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf","quote":{"address":"0xbBD09F72b025360FeE5C928053Dca6248d35be54","balance":"104791733009889328089","decimals":18,"symbol":"ON"}},"quote_share_of_supply":0.1949798532707173,"reads":[{"block":92003165,"method":"eth_blockNumber","params":[],"result_hash":"c09d1e1d943088792a481005585e3e4751810fb9bf466f1b41a59162ea0ad6ac","slot":null},{"block":null,"method":"eth_call","params":["0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf","token0()"],"raw_result":"0x5fc5360d0400a0fd4f2af552add042d716f1d168","result_hash":"742eb919f060d78d6f55d9d90c592b8d91ea7358553fc7e37cb579cf21192137","slot":null},{"block":null,"method":"eth_call","params":["0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf","token1()"],"raw_result":"0xbbd09f72b025360fee5c928053dca6248d35be54","result_hash":"9b8280eab4b504e672613d671b0cd5f1520c159c2dab3c47ff26420d9657b82a","slot":null},{"block":null,"method":"eth_call","params":["0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf","getReserves()"],"raw_result":"false","result_hash":"076de6e730df0b4c3860877a0f619c6ac11f8aefd78313ac793a2a703c026869","slot":null},{"block":null,"method":"eth_call","params":["0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf","slot0()"],"raw_result":"true","result_hash":"18d10c7d2b4b04aaf04254d1ae5d655a5dc0407cbcdd5a8c3986e985370f36ee","slot":null},{"block":null,"method":"eth_call","params":["0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf","factory()"],"raw_result":"0x1f7d7550b1b028f7571e69a784071f0205fd2efa","result_hash":"bf7614e6e838b22e4363dfcb3022451641875235ca13e64f8d2d8c3334ff85f3","slot":null},{"block":null,"method":"eth_call","params":["0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf","fee()"],"raw_result":"10000","result_hash":"328d48ab2376d2f42d3af5ba69086143c8f5fe883ed195a8280b2154a5711a33","slot":null},{"block":null,"method":"eth_call","params":["0x1f7d7550B1b028f7571E69A784071F0205FD2EfA","getPool","0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","0xbBD09F72b025360FeE5C928053Dca6248d35be54","0x2710"],"raw_result":"0xfce637eead7d62d9ed27f81d9767de03e9e534cf","result_hash":"b30c2cd880bb3159d4f8919e579f63ae14bdcc73a8e77918fda0d95f38cb94d0","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","symbol()"],"raw_result":"Some(\"USDG\")","result_hash":"5cbfd9547b12ffd28d96e5f55c97290c4f230a8d7ad7bbe91dc15f2e61c1a3c5","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","balanceOf","0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf"],"raw_result":"Some(\"2823834801\")","result_hash":"0fa32ee224b0b3025097ad1091d29bf326374a0f9bbd0cb5a2a81d60f319bb4a","slot":null},{"block":null,"method":"eth_call","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","symbol()"],"raw_result":"Some(\"ON\")","result_hash":"78ea85acd0023f2bfab0324a8514cec69acc6aa2df714f361b0b41c04017fc4c","slot":null},{"block":null,"method":"eth_call","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","balanceOf","0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf"],"raw_result":"Some(\"104791733009889328089\")","result_hash":"c81c16582695a8d81a060e7404182a6667ad65ef71276af15ab1490fdbc739bc","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","symbol()"],"raw_result":"Some(\"USDG\")","result_hash":"5cbfd9547b12ffd28d96e5f55c97290c4f230a8d7ad7bbe91dc15f2e61c1a3c5","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","name()"],"raw_result":"Some(\"Global Dollar\")","result_hash":"e34c795a5a7df6a2269bde7247321204357731d7742ef5974b04eb6899db8b11","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","decimals()"],"raw_result":"Some(6)","result_hash":"c68fe6989b1835302197d0af5be845dfab10ed9f9632205eb4ab5b949b9e1a6a","slot":null},{"block":null,"method":"eth_call","params":["0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168","totalSupply()"],"raw_result":"Some(\"696496200347174\")","result_hash":"c89de63b57cbd2df29547c452103566aa72dd3f4abac92a6142add18e0bbbedd","slot":null},{"block":null,"method":"eth_call","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","symbol()"],"raw_result":"Some(\"ON\")","result_hash":"78ea85acd0023f2bfab0324a8514cec69acc6aa2df714f361b0b41c04017fc4c","slot":null},{"block":null,"method":"eth_call","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","name()"],"raw_result":"Some(\"ON Semiconductor • Robinhood Token\")","result_hash":"1d2279798ad7a057b6ceb95e325712aa20d1a1c235acda85cee2638448923be8","slot":null},{"block":null,"method":"eth_call","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","decimals()"],"raw_result":"Some(18)","result_hash":"c14f173ff30df32f36fac2ea29d9a20482082428fd32b58be5433d310884f764","slot":null},{"block":null,"method":"eth_call","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","totalSupply()"],"raw_result":"Some(\"537449030000000000000\")","result_hash":"29650b8daf39d540bff0ea3990d64bff86fd0482f95f9b634f54c99820156873","slot":null},{"block":null,"method":"eth_call","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","uiMultiplier()"],"raw_result":"1000000000000000000","result_hash":"46754a2491051f216577f1b9f19516f9be1a28c62f023dcbabd8c5317cdefe4b","slot":null},{"block":null,"method":"eth_getCode","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null},{"block":null,"method":"eth_getCode","params":["0xbBD09F72b025360FeE5C928053Dca6248d35be54","latest"],"result_hash":"e023f4a2e14683cf62969bf3dc7d7821b1e293e30ebe17f3bc5fd0b223173f25","slot":null}],"registry_entry":{"chain":"robinhood","contract":"0xbBD09F72b025360FeE5C928053Dca6248d35be54","decimals":18,"issuer":"Robinhood","last_checked":"2026-10-18T18:54:09Z","name":"ON Semiconductor","official_deployments":[{"address":"0xbBD09F72b025360FeE5C928053Dca6248d35be54","network":"Robinhood Chain"}],"source":"robinhood-registry","source_url":"https://api.robinhood.com/rhj/assets","ticker":"ON"},"registry_hash":"e40a8f7ec2f1a2c1d6467a45e0976602299513549c0406d646df02a3ecb928c8","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":null,"subject":"0xfcE637eeAd7D62d9ED27F81D9767de03e9E534Cf","ticker":"ON","verdict":{"Verified":{"issuer":"Robinhood","ticker":"ON"}},"version":1}

Signature

Ei3j+mfkK2jXedp4dpb+m2VuG9goKRac8NK9uvgDoyasiuCU7RwlYKu1Adjge0FZvnIkgn8V01sKJkhHyKzKAQ==

API call

GET /api/attest/4da3e43d77c1fcd25b99236ed8c67d51c350c3390d2d616f83ac873cc04c7d4d

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.