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 cannot edit flashcards that I added to my own set from another study set.”
Google Play · 1/5 · 2026-03-05

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 2907673729

Proof data

Record hash (SHA-256): f18dc0fa2c342015b4ed21630b4ed90276b0f86cd4a3c3b32df5f708353d0bcc
Signature (Ed25519, base64): +ekHY5SUnk8yLk4LDM1VUYSkMgsdGbAURm6vDsG+ZqNG5Drn3yiPxO3RW3+LgIZoHkYrfsgwthLviOIAKWX7Aw==
Merkle root: b9a08f9d6d76dd148110a496219c42cf3205c6f982800d84d5c85d77e9461e02
Merkle path: ["f18d3b21948532d8326c6140ee5a8d6d0a6386077fd32b1d066ea4de662a64f1","309c5cfbe3ab6e3770f3a03776800f52f1cab82377f05fd758814e6fb39115fa","a6c316a4652bb09731b73661c6e4a31bf19c523eb5cfc10b58ca7d838552ca5e","2e94b3a98430784d8d1fd067a01827ed26db8b702eb0735d98c80d8d50f77cca","6a60b7b3d6739292cc6efdcf1f26b999914b0145d373286cd621ce63e36a7483","e7c21a81ca9d04d060d5137f67f8294c60d55fc6f4d0ef9026e9266d8f194bdb","44197c28acb9c1d34619f1315aa3e5643d486a1b95b6c0d0a0563b3d5564e0d7","6eb57ee9d469798aa843aeac3653fc72fce396abefa36e936d1ba436d60df359","847ba7ba2ecd1d21fbe48c87ef873f1fac7afe250dac06692c73a37fc2ea8f28","2ea6bffa9673f3a81bbc868569f3e6ff306870034622c6e56499753f4c5dd170","1ce8185a67fc0f0f175627564ef800e7835dfec27d00240c56e1eaf3b636cfe9","e89b125d6d75a826a464fa50668f6e82a6668dbc929bfd3fce7c23cc14adfdbc","c975f4076f62a76765a4bc502e988829db65110a1650004b828d2dfb5f90a9da","f92a7fda99af63eb008476cac47b147880eec6868f847624f8b438c917195408","4543e8b9ac7bd077d9526acfdae449f0a0d5517cbb42414f50ef930ecdb9470b"]
Anchored: 2026-09-22
Public log entry: search.sigstore.dev, log index 2907673729 · entry 108e9186e8c5677a06ea…
Expected log hash: bf9a74000249ba6e66b1e29aae9d8cb95c3400dc118569a80e5c0949f3e8ac62 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":"v1789969984102","kind":"published-quote","locale":"en","page":"theme:vaia/delivery/en","quote":"I cannot edit flashcards that I added to my own set from another study set.","rating":1,"review_date":"2026-03-05","source":"Google Play","source_url":"https://play.google.com/store/apps/details?id=com.studysmarter","v":1}

Verify in the public log

Open the Rekor entry (pre-filled with this proof's log index).
In the entry, compare spec.data.hash.value with the "Expected log hash" above: it is the SHA-256 of the Merkle root string (b9a08f9d6d76…), which ties this proof's root to the log entry.
Decode spec.signature.publicKey.content from base64: it must equal Citatio's published key at /.well-known/citatio-signing.json.
The entry's integratedTime is the independent timestamp: the root, and with it this quote, existed no later than that moment.
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.