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-2026-1008-TLMPJ4U6 Content hash fbca3ec7c3ffd2d42c49e0d8273085ed88e06b674f4322dd98c2e8c46feaffb6 Articles recorded that day 18 Attestation UID 0xc9f2778eaabda8f3825b12ccddbe0d2fe021b9fdb858c7bf7ef391d02a1bd650 View on EAS Transaction 0x772581b0c402c238fb58b0e907078d4c05f8f9566bea1e401e4b2ac07d7e4996 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 0x39f5ca0ffcc0fc2fc4b9faa6234dcfc7bc0f61086a930296cdcefe83f47f9965 Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).
Step 1, combined with the value after it 0x4a13d0e7673e0fbdf4fa390fcba22773e9f3a9a717a95375411628f8c6afa0f0 0x3f1b06292e3fa6141e479d66e28240109c8c9921a7e1ffeaf68af4a012802aaf Step 2, combined with the value after it 0x0ad9329b0d83a42f557337bfbbc4fd2c5283443d7b2f19dc76bb9b26ab2c21a2 0x8e9a9d2df0a293ae8c9d52f6b70a6588dfc3a4608746b4d037a60763930bf434 Step 3, combined with the value before it 0x464e255ac0ee981914230a3f4e9b5c8d788c8eb0dfc19c6cac5b626311b7fe5d 0x730b741698ce1e44832a12a50a945b3fa53dc581c3a8346cb6c8125d23b358a3 Step 4, combined with the value before it 0x366704e51be5339bcfbd2dadf5673d4c73b3d9628408711d9dedcf5b792e4aac 0xc08b27e8a2d549dec72fb176403f4f93fa2e2351f43dff765d15a7ffbc41574f Step 5, combined with the value after it 0xefe67e8818fed37489d7df9f4ccef876c449a371f6aa50ca6c7ee89876435ae8 0xeb001c580d29d4587f4a3e8aafc9e961640c7ff2d9442e2f96576d645b8f22a8 This is the value for the whole day.
Value these steps arrive at 0xeb001c580d29d4587f4a3e8aafc9e961640c7ff2d9442e2f96576d645b8f22a8 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 0xeb001c580d29d4587f4a3e8aafc9e961640c7ff2d9442e2f96576d645b8f22a8 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.
{"abstract":null,"agreement":false,"authors":[{"identity":"poweredbyplants","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"marks":[{"attrs":{"color":"purple"},"type":"textColor"},{"attrs":{"font":"mono"},"type…Copy this text, paste it into any SHA-256 tool, and compare the result with the hash shown above. If the two match, this is exactly what Vitahash recorded.
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-2026-1008-TLMPJ4U6/canonical" | shasum -a 256Should print fbca3ec7c3ffd2d42c49e0d8273085ed88e06b674f4322dd98c2e8c46feaffb6
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-2026-1008-TLMPJ4U6
CONTENT=fbca3ec7c3ffd2d42c49e0d8273085ed88e06b674f4322dd98c2e8c46feaffb6
DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1)
printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256Should print 39f5ca0ffcc0fc2fc4b9faa6234dcfc7bc0f61086a930296cdcefe83f47f9965
3. Combine step 1 The value you have goes first, then the published value.
printf '01%s%s' "39f5ca0ffcc0fc2fc4b9faa6234dcfc7bc0f61086a930296cdcefe83f47f9965" "4a13d0e7673e0fbdf4fa390fcba22773e9f3a9a717a95375411628f8c6afa0f0" | xxd -r -p | shasum -a 256Should print 3f1b06292e3fa6141e479d66e28240109c8c9921a7e1ffeaf68af4a012802aaf
4. Combine step 2 The value you have goes first, then the published value.
printf '01%s%s' "3f1b06292e3fa6141e479d66e28240109c8c9921a7e1ffeaf68af4a012802aaf" "0ad9329b0d83a42f557337bfbbc4fd2c5283443d7b2f19dc76bb9b26ab2c21a2" | xxd -r -p | shasum -a 256Should print 8e9a9d2df0a293ae8c9d52f6b70a6588dfc3a4608746b4d037a60763930bf434
5. Combine step 3 The published value goes first, then the value you have.
printf '01%s%s' "464e255ac0ee981914230a3f4e9b5c8d788c8eb0dfc19c6cac5b626311b7fe5d" "8e9a9d2df0a293ae8c9d52f6b70a6588dfc3a4608746b4d037a60763930bf434" | xxd -r -p | shasum -a 256Should print 730b741698ce1e44832a12a50a945b3fa53dc581c3a8346cb6c8125d23b358a3
6. Combine step 4 The published value goes first, then the value you have.
printf '01%s%s' "366704e51be5339bcfbd2dadf5673d4c73b3d9628408711d9dedcf5b792e4aac" "730b741698ce1e44832a12a50a945b3fa53dc581c3a8346cb6c8125d23b358a3" | xxd -r -p | shasum -a 256Should print c08b27e8a2d549dec72fb176403f4f93fa2e2351f43dff765d15a7ffbc41574f
7. Combine step 5 The value you have goes first, then the published value.
printf '01%s%s' "c08b27e8a2d549dec72fb176403f4f93fa2e2351f43dff765d15a7ffbc41574f" "efe67e8818fed37489d7df9f4ccef876c449a371f6aa50ca6c7ee89876435ae8" | xxd -r -p | shasum -a 256Should print eb001c580d29d4587f4a3e8aafc9e961640c7ff2d9442e2f96576d645b8f22a8
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/0xc9f2778eaabda8f3825b12ccddbe0d2fe021b9fdb858c7bf7ef391d02a1bd650The rules these commands follow are written down in full, so anyone can reimplement them.
Read the specification