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.

“Die App ist nach einer einzigen Aufgabe nicht mehr kostenlos zu verwenden”

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 2514476227

Proof data

Record hash (SHA-256)

0a9b4914dbf28298f8accc9ac1068e36f08b860ea24130ec17f8267265e5e9e8

Signature (Ed25519, base64)

ReMS9nOQE3uXGxH2BF2/iWfLixg+6MB6dEGb6kPLxc7oyiaFFZglNK2DPOoUi4Xjtjq2agFIDJyyIUKVTk/XAA==

Merkle root

a086f9fa8309b32cad6e06b6c84c12133a405483807f462eafed4cabc6f3fb99

Merkle path

["0a9ed97bab5047d86f8ed919ade04828cc61576bf5a8e3ab5c41bc0dc7046677","253b8a66c280404f4ace41e3f8b7fe33ad1498dcf6aa141b36f5a96ebb615d9e","b2a86209368f73011646c826003801ff659000d7c8bd20664b4449f7bc28b2e0","ec52e5dd46b1a3187e41266e573fa45fb8b3530795b282c2325189c1fd979dd7","2ba620969b02c18cbc1936adc93ffbadd1cffb4114c1ab7d0517e3a454a6a0b9","31a419039bb944828cfe5bc59513886ded96057c9f1496bd22b5c77d7f75986e","36bc99eb1fda9678f2ca5924998ded86c9129ff939812c2bdb80d371a9d60075","b6d07a0f0b07b63383e4f42d524da04d600dfb39d9464ad20eadfc6596b0d181","4ec4d3a7bf6984812eb2cd920b6429aa2cf567539dab0b7c8a00705c64b8c70d","bb5684c3d87ec4d9b4f808137b1ba025f3917702a1657403268de0e1e0b188e1","96493e4a086c37f8a74a6ed1ad7e4595b74e9f113dc11acbde03ccc9e9055f43","0ccf6f0495870a48fb418bb7380dbb8df9da396ae2836c877ff838e92e889b31","6524172f6bc7fc76e6e0803c488a2dc7fb1fb8c35a8cdc8ed06b91c9ec2353c6","3aaa0ca1c59e2fffb0896520bfab42cd665f7155bd5324013ae19a22f4f790c8","d4cf3fd862731bc6a1728d66b360c0434f801f84e015a828556d2731bd771b26"]

Anchored

2026-08-19

Public log entry

search.sigstore.dev, log index 2514476227 · entry 108e9186e8c5677ab19c…

Expected log hash

9a346357c8991b17bced8f12238c2332c4ac3078c0d9a283ee00f82b3c69be66 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":"v1787129084398","kind":"published-quote","locale":"de","page":"brand:smallpdf","quote":"Die App ist nach einer einzigen Aufgabe nicht mehr kostenlos zu verwenden","rating":1,"review_date":"2025-06-29","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.smallpdf.app.android","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 (a086f9fa8309…), 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.