AMDx/Unknown

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":null,"chain":"Solana","checked_at":"2026-09-30T00:25:46Z","dev":false,"expires_at":"2026-10-01T00:25:46Z","issuer":"Backed xStocks","pool":{"base":{"address":"XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF","balance":"791910820","decimals":8,"symbol":"AMDx"},"chain":"Solana","dex":"orca-whirlpool","pool":"9cprLgGXPfbkur11KpYzRPjooSycahSknTmmao45jt8R","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"4775838448","decimals":6,"symbol":null}},"quote_share_of_supply":0.00011078646905846087,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"7b94a8d81c0ed141f7149834eb845b0c96d14a00c48b07cc154e46fa2711541e","slot":451802239},{"block":null,"method":"getAccountInfo","params":["9cprLgGXPfbkur11KpYzRPjooSycahSknTmmao45jt8R",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451802241},"value":{"data":["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","base64"],"executable":false,"lamports":5435760,"owner":"whirLbMiicVdio4qvUfM5KAg6Ct8VwpYzGff3uctyCc","rentEpoch":18446744073709551615,"space":653}},"result_hash":"ba740b86aac12f285c75f8e6fb437b91e9bb30e7690d822d2132486f0010c888","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["3zuhtjcet44LpN2AfKfEFyxckJ9dAjZPTk9adS8Tdg7U",{"commitment":"confirmed"}],"result_hash":"1b96b84095dd1e3cc221d04ef98ec2a12205c12e1f996bd9df6d6a46e365b42b","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["72YwbHyyjxQZmK1fvVunmtZbAspDxiYi1Z1XUNLjvH1i",{"commitment":"confirmed"}],"result_hash":"8b297094318e51a466b7a18461306110a0dd0c8d1ede4a0bd634310396faba84","slot":null},{"block":null,"method":"getMultipleAccounts","params":[["XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"8a9ac4835c6914b8aa043faad1057a214c641ad61970599b2f9b810060edc748","slot":null},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"e0a6e5b24fe14313be92c0f3e432e773909fdccb88eaaaf976b1ef5be8e2cf01","slot":null},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451802272},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmbwnTmr2H0GwAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":534808027998,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"827a2bd3d599b59b46901e8a5c15d425fb874ebf6044fc182528b555773d9349","slot":null},{"block":null,"method":"getTokenSupply","params":["XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF",{"commitment":"confirmed"}],"result_hash":"8593807393e26eeb1c817730779bad7e33c0dac8a070a67d5da36622049c31d2","slot":null},{"block":null,"method":"getAccountInfo","params":["XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451802292},"value":{"data":["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","base64"],"executable":false,"lamports":5581920,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":674}},"result_hash":"2353bae81afb9933ededffdaa87c67079c2c17d313bc0310e3a1a82e2facf8f5","slot":null}],"registry_entry":{"chain":"Solana","contract":"XsXcJ6GZ9kVnjqGsjBnktRcuwMBmvKWh8S93RefZ1rF","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-09-29T23:37:23Z","name":"AMD","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"AMD"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":451802239,"subject":"9cprLgGXPfbkur11KpYzRPjooSycahSknTmmao45jt8R","ticker":"AMD","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"AMD"}},"version":1}

Signature

e5CPVfHYQqmbTO/FWAXYas5QfqbTQBjTchmR6eEOWqvQ69RzYw2z/Y+40wgCO3MumOBBRnSIlM8ZtL0kuTKMDg==

API call

GET /api/attest/1fe617234bf310f639b56830312bc6f554549ca29e48c064930b0644b380ef4b

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.