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-2026-0910-SSJUXXUV Content hash 0de6b0226b770c8f12a2ed30059433d34eb4ba54a6c5e1dbe646204bc693e4dd Articles recorded that day 7 Attestation UID 0x43dd040a36ca280cd09cc8ecc6139eac09edbe31e9fc66b954bcb354e6632ac8 View on EAS Transaction 0x3bcb5ee308c0e96aeb2462c554339d1f273ddc4af14e018f66d66740b22a0dd6 View on Basescan Recorded on Base using canonicalization v1 and record format v1.
How this article reaches the blockchain It was combined with the other 6 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 0x9288c5977b08ba204737f5ec72def28270610e9b105f190e41d97bbb2a5c6eba 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 0x517ca51a051f949b6b182d1940f1a29128c3fffa459fefb2993d7fc6a2e00055 0xd3c9887a7bb069ef5742cb5389769b1ae4774cb750a229af8ab60ce11b7c9b4d Step 2, combined with the value before it 0x9ce4219c6e9f73e60d8404aecc9b4f75bc3bb53ecdc134253dee75c5b28c8958 0x5e650b8006d2a7eda81bb5d4ed9c0d4d00a341c3830745859eaba27f43433dfa Step 3, combined with the value after it 0x9d219722d7b5ca1b6b93640cb99cb26872d115b20f8fb163e9367b343dff4564 0x23678bd26e188a26b1928f578d79388c822fad626d52b886eeb90f6955eef1b7 This is the value for the whole day.
Value these steps arrive at 0x23678bd26e188a26b1928f578d79388c822fad626d52b886eeb90f6955eef1b7 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 0x23678bd26e188a26b1928f578d79388c822fad626d52b886eeb90f6955eef1b7 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-2026-0910-SSJUXXUV/canonical" | shasum -a 256Should print 0de6b0226b770c8f12a2ed30059433d34eb4ba54a6c5e1dbe646204bc693e4dd
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-2026-0910-SSJUXXUV
CONTENT=0de6b0226b770c8f12a2ed30059433d34eb4ba54a6c5e1dbe646204bc693e4dd
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print 9288c5977b08ba204737f5ec72def28270610e9b105f190e41d97bbb2a5c6eba
3. Combine step 1 The published value goes first, then the value you have.
printf '01%s%s' "517ca51a051f949b6b182d1940f1a29128c3fffa459fefb2993d7fc6a2e00055" "9288c5977b08ba204737f5ec72def28270610e9b105f190e41d97bbb2a5c6eba" | xxd -r -p | shasum -a 256Should print d3c9887a7bb069ef5742cb5389769b1ae4774cb750a229af8ab60ce11b7c9b4d
4. Combine step 2 The published value goes first, then the value you have.
printf '01%s%s' "9ce4219c6e9f73e60d8404aecc9b4f75bc3bb53ecdc134253dee75c5b28c8958" "d3c9887a7bb069ef5742cb5389769b1ae4774cb750a229af8ab60ce11b7c9b4d" | xxd -r -p | shasum -a 256Should print 5e650b8006d2a7eda81bb5d4ed9c0d4d00a341c3830745859eaba27f43433dfa
5. Combine step 3 The value you have goes first, then the published value.
printf '01%s%s' "5e650b8006d2a7eda81bb5d4ed9c0d4d00a341c3830745859eaba27f43433dfa" "9d219722d7b5ca1b6b93640cb99cb26872d115b20f8fb163e9367b343dff4564" | xxd -r -p | shasum -a 256Should print 23678bd26e188a26b1928f578d79388c822fad626d52b886eeb90f6955eef1b7
6. 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/0x43dd040a36ca280cd09cc8ecc6139eac09edbe31e9fc66b954bcb354e6632ac8The rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification