This article has not changed since Vitahash recorded it on the Base blockchain. Everything below can be checked without taking our word for any of it.
Stamp ID STAMP-2026-1004-XV2QA6AN Content hash 104b1555715d7372d11534f3fef875ada2dd44fa24db552c54a0d4c64ccdd3fc Articles recorded that day 18 Attestation UID 0xf6e9fba3ba6b1c6c69752bbc92919500502fb2928b7ae486ffe947b18c4abd7b View on EAS Transaction 0x22ca88a7c468bd5db1e7c0a5557a5c96ef85c6db922f1c80cc3508747dd1824d View on Basescan Recorded on Base using canonicalization v2 and record format v1.
How this article reaches the blockchain It was combined with the other 17 articles published that day, one step at a time, until the whole day became a single value. That one value is what Vitahash wrote to the blockchain. Change a single character of this article and the starting value below changes, so none of the steps would land on the recorded one.
Starting value for this article 0x90b389db37f01cb57ed1a8ed8b9c3b72bd790d1ced0178ac641de285f706f891 Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).
Step 1, combined with the value before it 0x39afb49f9f7790af7d5ed31a8d24d6c4b415638123abbbfec50cc2038853e564 0x216bda84faad1a65f88feb948ad35688f37f31cccf0507ab5ad4a533c3656efc Step 2, combined with the value before it 0x88a50bebd7946b0333cbc87ec0a580bef54324b77b7c68c0b3e83aede9bf5b95 0x08e365db5235a29439034a399eb9251c1f4830b35051a287fee77ba91b9fcbe1 This is the value for the whole day.
Value these steps arrive at 0x08e365db5235a29439034a399eb9251c1f4830b35051a287fee77ba91b9fcbe1 What the blockchain says Two values, reached two different ways. The one above was worked out from this article. The one below was read back from the record on Base.
Worked out from this article 0x08e365db5235a29439034a399eb9251c1f4830b35051a287fee77ba91b9fcbe1 They are the same value, so this article was published that day with exactly the text above.
Check it yourself Every number on this page came from Vitahash. Copy the article's exact text below and check it against the hash above, using any SHA-256 tool.
The exact text is not available for this article right now. The command below still reaches it.
1. Hash the article yourself This downloads the exact text Vitahash hashed, in the exact form it hashed it, and hashes it again on your machine. Nothing Vitahash wrote runs here.
curl -s "https://api.vitahash.org/api/verify/STAMP-2026-1004-XV2QA6AN/canonical" | shasum -a 256Should print 104b1555715d7372d11534f3fef875ada2dd44fa24db552c54a0d4c64ccdd3fc
2. Build this article's starting value The stamp ID is folded in with the hash, so one article's record can never stand in for another's.
STAMP=STAMP-2026-1004-XV2QA6AN
CONTENT=104b1555715d7372d11534f3fef875ada2dd44fa24db552c54a0d4c64ccdd3fc
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print 90b389db37f01cb57ed1a8ed8b9c3b72bd790d1ced0178ac641de285f706f891
3. Combine step 1 The published value goes first, then the value you have.
printf '01%s%s' "39afb49f9f7790af7d5ed31a8d24d6c4b415638123abbbfec50cc2038853e564" "90b389db37f01cb57ed1a8ed8b9c3b72bd790d1ced0178ac641de285f706f891" | xxd -r -p | shasum -a 256Should print 216bda84faad1a65f88feb948ad35688f37f31cccf0507ab5ad4a533c3656efc
4. Combine step 2 The published value goes first, then the value you have.
printf '01%s%s' "88a50bebd7946b0333cbc87ec0a580bef54324b77b7c68c0b3e83aede9bf5b95" "216bda84faad1a65f88feb948ad35688f37f31cccf0507ab5ad4a533c3656efc" | xxd -r -p | shasum -a 256Should print 08e365db5235a29439034a399eb9251c1f4830b35051a287fee77ba91b9fcbe1
5. Compare with the blockchain The last value above is what the whole day came to. Read the record on Base and check its merkleRoot field is the same. Vitahash is not involved in this step at all.
https://base.easscan.org/attestation/view/0xf6e9fba3ba6b1c6c69752bbc92919500502fb2928b7ae486ffe947b18c4abd7bThe rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification