Quote verification

This proves the quote below is recorded by Citatio exactly as displayed and has not been altered since it was committed and anchored. It documents Citatio's crawl observation; it does not imply endorsement by the source platform. The quote links to the original review.

“I couldn't edit text on a PDF”

Checks (re-run on this request)

• ✓ Signature — Ed25519 signature over the record hash, verified against the public key at /.well-known/citatio-signing.json
• ✓ Merkle inclusion — Leaf recomputed through the sibling path to the anchored root
• ✓ Public transparency log — Sigstore Rekor log index 2621233673

Proof data

Record hash (SHA-256)

156164d2032654b2ce3eb630d1f335876dced4815ae94703b88d876c92007b8a

Signature (Ed25519, base64)

dO2m0w8gBK/5MWkEPP+hpPAH/jPKBiixGFE0pa7tZ9p5xDfc4bv07xKspDUXf7DsuDVVScv/TZIXwc4RapVqBQ==

Merkle root

3e5b84dbb37ce6f75730ed2b32f91cd71f3a65addfb4db0a36bb6e93c637284a

Merkle path

["1554c6cff94497a79dba27a74627c471382c78384a550de810ea4041649e750e","e226ff739486b08dde474e3d8eaa4ae3c14cc5dfd6c969b0c771fa70780244dd","979f08abd52ac17c8d03702810c953680ccedc3949cf1ebe01af799ebcbbe154","9d35ad398b7d74bc5de9ec053e14395f316734e67652b95d22c332e7db3747aa","8581113c79b3b8c7effb8114e1fd6207046858cf43c517b6f995f773f39020ee","a7a2ede123dedd4b60618450c54dc20000f99b03c9d39e2940c8819ded249514","b13241a4df751124593e01af1f22696b108b0bc12b55657959337e798355f704","85e56baab7b522a5cbc6398b960057b532e67ab03e24dc597298a75283dfd583","901395b11a498f3b5b7c2b7f910a7aa20caa39eebbb8b8141ce2b2c6f4d65919","3bb5fd581fc055d29569cdbd3511521fc9d6f326cab658a22dc0a88fd3d6e932","07e586853ed7df60dbef618524eb346f2dbbb4d6eebda4c9559f971e8876deb1","5e1d55cc495e25a055082f31061576a01811fae87e315b90c56cc742da8c21b1","09ffd4ff7f987b3f51093f1e58033f05d70251a8231cecee13929f5904d44057","4b83a60597c484d00737793c9d1e20749c33d1394631936e64d7dcd8530ecde9","359169a64f9c96ceed911524de6d7935fe237a0309f08d7968d6105d6218494f"]

Anchored

2026-08-28

Public log entry

search.sigstore.dev, log index 2621233673 · entry 108e9186e8c5677aab9d…

Expected log hash

8f69f81c385ed6162582e2743ec87609f0e5a311201997ab1f656c8ded6f904e The log entry's spec.data.hash.value must equal this value: the SHA-256 of the Merkle root string above. Recompute it yourself from the root to confirm.

Canonical record

{"dataset_version":"v1787884205203","kind":"published-quote","locale":"en","page":"product:acrobat/pdf-editor/en","quote":"I couldn't edit text on a PDF","rating":1,"review_date":"2026-07-23","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.adobe.reader","v":1}

Verify in the public log

1. Open the Rekor entry (pre-filled with this proof's log index).
2. In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (3e5b84dbb37c…), which ties this proof's root to the log entry.
3. Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
4. The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
5. Locally, without any Citatio infrastructure: SHA-256 the canonical record (must equal the record hash), verify the Ed25519 signature against the public key, and fold the hash through the Merkle path (sorted-pair SHA-256) to reach the anchored root.