SPYx/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":"2026-10-02T22:10:59Z","dev":false,"expires_at":"2026-10-03T22:10:59Z","issuer":"Backed xStocks","pool":{"base":{"address":"XsoCS1TfEyfFhfvj8EtZ528L3CaKBDBRqRapnBbDF2W","balance":"19957262992","decimals":8,"symbol":"SPYx"},"chain":"Solana","dex":"raydium-clmm","pool":"4pCZCVEiYyT4efNdXUdL2tJF8VGMgiMXrZWq6FiNXhRw","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"254479559619","decimals":6,"symbol":null}},"quote_share_of_supply":0.0020956711358978,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"16c3a081f527efc630983fef82c6a911408196c2c931e9b678bfe9ca1809c5b4","slot":452740650},{"block":null,"method":"getAccountInfo","params":["4pCZCVEiYyT4efNdXUdL2tJF8VGMgiMXrZWq6FiNXhRw",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":452740651},"value":{"data":["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","base64"],"executable":false,"lamports":11638132,"owner":"CAMMCzo5YL8w4VFF8KVHrK22GGUsp5VTaW7grrKgrWqK","rentEpoch":18446744073709551615,"space":1544}},"result_hash":"49b684b547de3fd3ef7a117f77a6c8b48ecc12c4f3f51c5bdb3b71141a3c5886","slot":452740651},{"block":null,"method":"getTokenAccountBalance","params":["92aTAYGnUCH28J96EFzD8ELa6ZpdzXw4zqEuX1nD6oD7",{"commitment":"confirmed"}],"result_hash":"37e4c9ed568b675d1520ef718245f66ae27dd98330111c4eae66677e75e51d77","slot":452740652},{"block":null,"method":"getTokenAccountBalance","params":["AUhtN1KPdVEQ1mh7gy3oHzjWyqHo5RQx1KEiFJdyqAeN",{"commitment":"confirmed"}],"result_hash":"044974b0a21497b4c149539d2758d3a75189fe5b8eee0bb8fd7586bf7111dab4","slot":452740653},{"block":null,"method":"getMultipleAccounts","params":[["XsoCS1TfEyfFhfvj8EtZ528L3CaKBDBRqRapnBbDF2W","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"7279939e6822d0c4de1172b4243b57c2b8394a7828e64d704be766f7d152ca9e","slot":452740654},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"e4ac2a075ef8533f0f112c2ce589e954f55c661057cab837b6735ad63d6f8ab5","slot":452740655},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":452740656},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmbvkNXFKlyHgAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":535325803497,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"d6294b046d5e1ec7796ebebea584f76e774799cb101a7a095781b577203cb252","slot":452740656},{"block":null,"method":"getTokenSupply","params":["XsoCS1TfEyfFhfvj8EtZ528L3CaKBDBRqRapnBbDF2W",{"commitment":"confirmed"}],"result_hash":"52d023ec869a5588a522fef1748993a4b1fe16c2aecbfab006b6358484c96bfe","slot":452740674},{"block":null,"method":"getAccountInfo","params":["XsoCS1TfEyfFhfvj8EtZ528L3CaKBDBRqRapnBbDF2W",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":452740675},"value":{"data":["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","base64"],"executable":false,"lamports":36662853,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":676}},"result_hash":"892b9380436c5d4eec70c31acaa5539749da272a8a11acdbeb46c5274056cc97","slot":452740675}],"registry_entry":{"chain":"Solana","contract":"XsoCS1TfEyfFhfvj8EtZ528L3CaKBDBRqRapnBbDF2W","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-10-02T22:09:51Z","name":"SP500","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"SPY"},"registry_hash":"11dcebb8d4fdbad179c2d67828c4591d49e75b9c7cbf7e9a65d475a8680fe650","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":452740650,"subject":"4pCZCVEiYyT4efNdXUdL2tJF8VGMgiMXrZWq6FiNXhRw","ticker":"SPY","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"SPY"}},"version":1}

Signature

DkqkLeevYSgri3nY7kXGlJDMrY54HfwyLNx6A+b8dGN5Q1WW72H2Uq+NUbBrIYhS39uAr4rOJ6XmA8muhbw5CA==

API call

GET /api/attest/9a28694b00ff51ed451ce62ed9b648f77f99c51a5dd1d7245566586e0da14608

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.