MCDx/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":"2026-09-30T00:19:27Z","dev":false,"expires_at":"2026-10-01T00:19:27Z","issuer":"Backed xStocks","pool":{"base":{"address":"XsqE9cRRpzxcGKDXj1BJ7Xmg4GRhZoyY1KpmGSxAWT2","balance":"89851793155","decimals":8,"symbol":"MCDx"},"chain":"Solana","dex":"raydium-clmm","pool":"5MGvNj9RNKNmzwp1LtZuQkZonEYtKJ3JuiyNQEUU2DsF","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"91463118623","decimals":6,"symbol":null}},"quote_share_of_supply":0.016444683759301908,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"ccb3e2740eb070cdd66fe2db0ede2490daf7a65758ad97e124bcf9e88e2070f9","slot":451800848},{"block":null,"method":"getAccountInfo","params":["5MGvNj9RNKNmzwp1LtZuQkZonEYtKJ3JuiyNQEUU2DsF",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451800850},"value":{"data":["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","base64"],"executable":false,"lamports":11640165,"owner":"CAMMCzo5YL8w4VFF8KVHrK22GGUsp5VTaW7grrKgrWqK","rentEpoch":18446744073709551615,"space":1544}},"result_hash":"cb30ee3e3a1ffc84dab6bd14d1a564ce48968696ac413863f3a59b6f8d2d6858","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["2njj6WrCb558AoVBa2WnSPi7HM9Myb7qENejtwW5TjYb",{"commitment":"confirmed"}],"result_hash":"b143865bc9e6d261b4c871a7ba2bfadf4cc5d2cf9c838c5902a9e978fe9bbcf9","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["DGM1Ve9TaD3yQaXhfkj6FCtk46hv1TvGGsbncXA6EfN4",{"commitment":"confirmed"}],"result_hash":"4736cd0ff92ab13d88c705682600150a061517d76c6428211aa16c19300c63ba","slot":null},{"block":null,"method":"getMultipleAccounts","params":[["XsqE9cRRpzxcGKDXj1BJ7Xmg4GRhZoyY1KpmGSxAWT2","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"e9b123540cedcf72fdf2b69c49630c1d201ef8d473938e8122402329266be3ea","slot":null},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"8e9c021602134f8776e11c8b12928bcd1cae2f2e9ff66488217b4c3c1999ed6b","slot":null},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451800854},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmblyEZd4f0GwAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":534808027998,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"3ae835821b7b4039bb3534968655347bd0a0c32fccf5872942c1925780b2d6f6","slot":null},{"block":null,"method":"getTokenSupply","params":["XsqE9cRRpzxcGKDXj1BJ7Xmg4GRhZoyY1KpmGSxAWT2",{"commitment":"confirmed"}],"result_hash":"e4b4877790ea49db33600e3856166b0852008f1d7618d01f6179b78e338d8821","slot":null},{"block":null,"method":"getAccountInfo","params":["XsqE9cRRpzxcGKDXj1BJ7Xmg4GRhZoyY1KpmGSxAWT2",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451800873},"value":{"data":["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","base64"],"executable":false,"lamports":5630640,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":681}},"result_hash":"57d34d1f3ff69c9a099aa8e0ecc67ad88fb8124a28c7060382f500d615d486df","slot":null}],"registry_entry":{"chain":"Solana","contract":"XsqE9cRRpzxcGKDXj1BJ7Xmg4GRhZoyY1KpmGSxAWT2","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-09-29T23:37:23Z","name":"McDonald's","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"MCD"},"registry_hash":"b3f72fc9046ef9a37e433405d5916bce13581b85d8cce5889f24cf56e53b77b4","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":451800848,"subject":"5MGvNj9RNKNmzwp1LtZuQkZonEYtKJ3JuiyNQEUU2DsF","ticker":"MCD","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"MCD"}},"version":1}

Signature

yIwk/2qd5PwpPWQDvKqIpIDJ6zqsztMr2Oc6eN9DhNkW6ElLgjitR6Dy+HSPpMBIouXL2gJ1M/4QUzdQrpPoCA==

API call

GET /api/attest/ce81d84afa3d86e0045b7a00d3bd59ba01796c87cf0bba69add2ea5f53ba8751

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.