AMBRx/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":"2026-09-29T09:40:05Z","dev":false,"expires_at":"2026-09-30T09:40:05Z","issuer":"Backed xStocks","pool":{"base":{"address":"XsaQTCgebC2KPbf27KUhdv5JFvHhQ4GDAPURwrEhAzb","balance":"23622757762","decimals":8,"symbol":"AMBRx"},"chain":"Solana","dex":"meteora-dlmm","pool":"6hM13BNzWi1pa8BSXHvEzgSzgFRRGDNT1UwqT9EVwQYi","quote":{"address":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","balance":"718747657","decimals":6,"symbol":null}},"quote_share_of_supply":0.00002604687148120499,"reads":[{"block":null,"method":"getSlot","params":[{"commitment":"confirmed"}],"result_hash":"856a6787b8dcd59cc266eb81829c40172b59b30cb545960e0cda215c1ac66336","slot":451604017},{"block":null,"method":"getAccountInfo","params":["6hM13BNzWi1pa8BSXHvEzgSzgFRRGDNT1UwqT9EVwQYi",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451604018},"value":{"data":["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","base64"],"executable":false,"lamports":7183720,"owner":"LBUZKhRxPF3XUpBCjp4YzTKgLccjZhTSDM9YuVaPwxo","rentEpoch":18446744073709551615,"space":904}},"result_hash":"bd38db832c6e93bb904332b0765f30fe062494a02d2cdfd8dfc1141938bf5ebc","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["6yFRWfz28Z5JoD2CAT4sNprqeXPqKdL4fvdwej1yyDBD",{"commitment":"confirmed"}],"result_hash":"7e824747d77196722bd8d495fbbc214b14e84c9423a1cad8354bccb65422e734","slot":null},{"block":null,"method":"getTokenAccountBalance","params":["Atk6t4MxWEgp1WnPBdAz4t4jdFdKGLJydLNrN7YFUyaV",{"commitment":"confirmed"}],"result_hash":"71229d42cfeee300fea7286caf7a12d0cbb5caf2fc6fb1a49b1fa39a9ea1ef59","slot":null},{"block":null,"method":"getMultipleAccounts","params":[["XsaQTCgebC2KPbf27KUhdv5JFvHhQ4GDAPURwrEhAzb","EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v"],{"commitment":"confirmed","encoding":"base64"}],"result_hash":"89a77ab6c665696a7a8a7e21ca6e11fad97ad182e4cf889125808b3945cf63ff","slot":null},{"block":null,"method":"getTokenSupply","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed"}],"result_hash":"7949a7fda4ac4d5679406f27f392583ef3a866fd65fd3773018a590672b7a118","slot":null},{"block":null,"method":"getAccountInfo","params":["EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451604023},"value":{"data":["AQAAAJj+huiNm+Lqi8HMpIeLKYjCQPUrhCS/tA7Rot3LXhmbZB1Gsz2hHAAGAQEAAABicKqKWcWUBbRShshncubNEm6bil06OFNtN/e0FOi2Zw==","base64"],"executable":false,"lamports":534808027998,"owner":"TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA","rentEpoch":18446744073709551615,"space":82}},"result_hash":"59b6e5072d007fe14a0671d8d038a6e9d4ee6ccf71f7c55d64e6beea5f2bec02","slot":null},{"block":null,"method":"getTokenSupply","params":["XsaQTCgebC2KPbf27KUhdv5JFvHhQ4GDAPURwrEhAzb",{"commitment":"confirmed"}],"result_hash":"b5838d2f78602456634ef2f6884554cf51aa2210cd5213f88907861b67ea6edd","slot":null},{"block":null,"method":"getAccountInfo","params":["XsaQTCgebC2KPbf27KUhdv5JFvHhQ4GDAPURwrEhAzb",{"commitment":"confirmed","encoding":"base64"}],"raw_result":{"context":{"apiVersion":"4.3.0","slot":451604043},"value":{"data":["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","base64"],"executable":false,"lamports":5609760,"owner":"TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb","rentEpoch":18446744073709551615,"space":678}},"result_hash":"717f0d3fcb66fd894699c0fce1829babb6eec851a7ffb6285a921eb50564a2e3","slot":null}],"registry_entry":{"chain":"Solana","contract":"XsaQTCgebC2KPbf27KUhdv5JFvHhQ4GDAPURwrEhAzb","decimals":null,"issuer":"Backed xStocks","last_checked":"2026-09-29T09:07:50Z","name":"Amber","source":"xstocks-api","source_url":"https://api.xstocks.fi/api/v2/public/assets","ticker":"AMBR"},"registry_hash":"9b23c9c0539374ace70a78512769898af2dd8afd4171afa32f303a3693710e35","signer":"GJWKkiUd3zj1pJGfeE7JitiPiwDJC6XmNFvpJWJuvvpn","slot":451604017,"subject":"6hM13BNzWi1pa8BSXHvEzgSzgFRRGDNT1UwqT9EVwQYi","ticker":"AMBR","verdict":{"Verified":{"issuer":"Backed xStocks","ticker":"AMBR"}},"version":1}

Signature

1Xg++ov5N8qSuMVeh0X0NlMZRr0XK/LjKsWd6k8GAcIic9CMMgizW9+iEw1+DBg4QGbUxo+n9SwLVgsPQ0NvBw==

API call

GET /api/attest/8b363649ca5e6ae4fb37197dc72bfb22b72095d16cd502e4861338c833906ac6

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.