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-2026-1003-A7QRUR4K Content hash 6bb48b749c1f777a70ae777960df85895c951a23dbfedc597aaa5373290ec2b2 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 0x0bfa52f9a3d737e03777bd8359151d5089a4e7d785bc27af0e9f128345af710f 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 0xf3e2d6345e3642ccb6d18b309fa799ddf6735a92e592d52e614b94ec4a2fd6a9 0x13349a7286666f1081ab7c52ca5dbe504d659ee6a894709564167ec9baa618ab Step 2, combined with the value before it 0x442c545db4530226e0a400b97a04e5b6cdf2307d443e82b6aeb1e7eefe2a71aa 0x1426adf9cdea7551753aa7000f5a5b1697ae9f9b7b5735753c8e43ffc00383bc Step 3, combined with the value after it 0xf7ed38dff2e0b8832c63ffcd8af5e7c62b165861ba079ff29dd735f628be6845 0xf06af4023575444307257bc7eb7d2206954e59673b7705a6aaa0edbad5a1fdef Step 4, combined with the value after it 0x6084880ccb9031ec74fb9ebfcad8c7d373e8fe72a594da8699dcaec3990083df 0x88a50bebd7946b0333cbc87ec0a580bef54324b77b7c68c0b3e83aede9bf5b95 Step 5, combined with the value after it 0x216bda84faad1a65f88feb948ad35688f37f31cccf0507ab5ad4a533c3656efc 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-2026-1003-A7QRUR4K/canonical" | shasum -a 256Should print 6bb48b749c1f777a70ae777960df85895c951a23dbfedc597aaa5373290ec2b2
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-2026-1003-A7QRUR4K
CONTENT=6bb48b749c1f777a70ae777960df85895c951a23dbfedc597aaa5373290ec2b2
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print 0bfa52f9a3d737e03777bd8359151d5089a4e7d785bc27af0e9f128345af710f
3. Combine step 1 The published value goes first, then the value you have.
printf '01%s%s' "f3e2d6345e3642ccb6d18b309fa799ddf6735a92e592d52e614b94ec4a2fd6a9" "0bfa52f9a3d737e03777bd8359151d5089a4e7d785bc27af0e9f128345af710f" | xxd -r -p | shasum -a 256Should print 13349a7286666f1081ab7c52ca5dbe504d659ee6a894709564167ec9baa618ab
4. Combine step 2 The published value goes first, then the value you have.
printf '01%s%s' "442c545db4530226e0a400b97a04e5b6cdf2307d443e82b6aeb1e7eefe2a71aa" "13349a7286666f1081ab7c52ca5dbe504d659ee6a894709564167ec9baa618ab" | xxd -r -p | shasum -a 256Should print 1426adf9cdea7551753aa7000f5a5b1697ae9f9b7b5735753c8e43ffc00383bc
5. Combine step 3 The value you have goes first, then the published value.
printf '01%s%s' "1426adf9cdea7551753aa7000f5a5b1697ae9f9b7b5735753c8e43ffc00383bc" "f7ed38dff2e0b8832c63ffcd8af5e7c62b165861ba079ff29dd735f628be6845" | xxd -r -p | shasum -a 256Should print f06af4023575444307257bc7eb7d2206954e59673b7705a6aaa0edbad5a1fdef
6. Combine step 4 The value you have goes first, then the published value.
printf '01%s%s' "f06af4023575444307257bc7eb7d2206954e59673b7705a6aaa0edbad5a1fdef" "6084880ccb9031ec74fb9ebfcad8c7d373e8fe72a594da8699dcaec3990083df" | xxd -r -p | shasum -a 256Should print 88a50bebd7946b0333cbc87ec0a580bef54324b77b7c68c0b3e83aede9bf5b95
7. Combine step 5 The value you have goes first, then the published value.
printf '01%s%s' "88a50bebd7946b0333cbc87ec0a580bef54324b77b7c68c0b3e83aede9bf5b95" "216bda84faad1a65f88feb948ad35688f37f31cccf0507ab5ad4a533c3656efc" | xxd -r -p | shasum -a 256Should print 08e365db5235a29439034a399eb9251c1f4830b35051a287fee77ba91b9fcbe1
8. 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