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Verified on Base

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.

The Smartest Dog Breed in the World

@ThePetTales · 19 Oct 2026

Stamp ID
STAMP-2026-1019-7TQN537F
Content hash
1fb95b2f7a33c0cfd7d26b886e3958c8420106fb89d610c64091c9e3b751c253
Day recorded
2026-10-20
Articles recorded that day
16
Attestation UID
0x93d64f817aa96872c3a5248b96e9c91608399a50c8c4273adfbf62f971f167ec
View on EAS
Transaction
0x9fe633b4d4a34f5e6242b3cf0ff45c83ab4a7ecc11a1084cc69f42989b8ac574
View on Basescan
Stamped
20 Oct 2026

Recorded on Base using canonicalization v2 and record format v1.

How this article reaches the blockchain

It was combined with the other 15 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
0xd95137e299d9092ed98fbb7ec09770f48f690141058219bbea70660eb4150095

Built from this article's content hash and its stamp ID, as sha256(0x00 || sha256(utf8(stampId)) || contentHash).

  1. Step 1, combined with the value before it
    0x37315c730d495f7b769b5eb17feb8f5cc0cc79e9cccc793c28e9af3a96ac2957
    0xc3866a013758cebfae1c15022401b931ae6355125cfdb7ce97d044850bdb1e0e
  2. Step 2, combined with the value after it
    0xf2e28422e44a96c74db77be9233c9ae290882c1f009f846f361a203e7e01cfa6
    0x476d8a60cfef3eb754f65c71993e2f13c314d4fecd7bcd94c996450c30ca8eec
  3. Step 3, combined with the value after it
    0x75e35b3ac0ef2b925566149d22ad800ea4649b4af1951d13354f5f875bf05c93
    0x6200cf6d055554851ed81c34e9916b3887bc3f64e1abeda6bd3f37592300c9a2
  4. Step 4, combined with the value after it
    0x2ec43559cf0e122de80e61aaaf34716e108cca54701d2013b438a0a9f93c5af5
    0x9022c784ca2a1d3863d7e5472e41a5d2867f0f68e6e21431763247963c30caef

    This is the value for the whole day.

Value these steps arrive at
0x9022c784ca2a1d3863d7e5472e41a5d2867f0f68e6e21431763247963c30caef

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
0x9022c784ca2a1d3863d7e5472e41a5d2867f0f68e6e21431763247963c30caef
Read from Base
0x9022c784ca2a1d3863d7e5472e41a5d2867f0f68e6e21431763247963c30caef
Read it yourself on EAS

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":"ThePetTales","position":1,"role":"solo","weight":1.0000}],"body":{"content":[{"content":[{"text":"Meet the Border Collie, widely considered the smartest dog breed! These incredible …

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.

For a technical reader: the terminal route

  1. 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-2026-1019-7TQN537F/canonical" | shasum -a 256

    Should print 1fb95b2f7a33c0cfd7d26b886e3958c8420106fb89d610c64091c9e3b751c253

  2. 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-2026-1019-7TQN537F CONTENT=1fb95b2f7a33c0cfd7d26b886e3958c8420106fb89d610c64091c9e3b751c253 DIGEST=$(printf '%s' "$STAMP" | shasum -a 256 | cut -d' ' -f1) printf '00%s%s' "$DIGEST" "$CONTENT" | xxd -r -p | shasum -a 256

    Should print d95137e299d9092ed98fbb7ec09770f48f690141058219bbea70660eb4150095

  3. 3. Combine step 1

    The published value goes first, then the value you have.

    printf '01%s%s' "37315c730d495f7b769b5eb17feb8f5cc0cc79e9cccc793c28e9af3a96ac2957" "d95137e299d9092ed98fbb7ec09770f48f690141058219bbea70660eb4150095" | xxd -r -p | shasum -a 256

    Should print c3866a013758cebfae1c15022401b931ae6355125cfdb7ce97d044850bdb1e0e

  4. 4. Combine step 2

    The value you have goes first, then the published value.

    printf '01%s%s' "c3866a013758cebfae1c15022401b931ae6355125cfdb7ce97d044850bdb1e0e" "f2e28422e44a96c74db77be9233c9ae290882c1f009f846f361a203e7e01cfa6" | xxd -r -p | shasum -a 256

    Should print 476d8a60cfef3eb754f65c71993e2f13c314d4fecd7bcd94c996450c30ca8eec

  5. 5. Combine step 3

    The value you have goes first, then the published value.

    printf '01%s%s' "476d8a60cfef3eb754f65c71993e2f13c314d4fecd7bcd94c996450c30ca8eec" "75e35b3ac0ef2b925566149d22ad800ea4649b4af1951d13354f5f875bf05c93" | xxd -r -p | shasum -a 256

    Should print 6200cf6d055554851ed81c34e9916b3887bc3f64e1abeda6bd3f37592300c9a2

  6. 6. Combine step 4

    The value you have goes first, then the published value.

    printf '01%s%s' "6200cf6d055554851ed81c34e9916b3887bc3f64e1abeda6bd3f37592300c9a2" "2ec43559cf0e122de80e61aaaf34716e108cca54701d2013b438a0a9f93c5af5" | xxd -r -p | shasum -a 256

    Should print 9022c784ca2a1d3863d7e5472e41a5d2867f0f68e6e21431763247963c30caef

  7. 7. 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/0x93d64f817aa96872c3a5248b96e9c91608399a50c8c4273adfbf62f971f167ec

The rules these commands follow are written down in full, so anyone can reimplement them.

Read the specification