Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 19918

Hash
000000fff403aed31725acfaa035e4cf24efed1dfe4a13b1754c437ab2ae154f
Confirmations
22192
Time
2026-10-11 02:21:06 UTC
Median time
2026-10-11 02:13:13 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
f18a60125cd5b011f22510277ee63d16ce3b8ab84fd885fdbba25acb2b3d0b4e
Previous block
00000009c6d55d8397039706cb0cccf1e3e0e373e43a70883d02a9b012b7beb2
Next block
00000016042f50c8074c66edf17594685bfe3ef936cb9505b2f4c963c22d3b6a

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 19918 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
e0397a707810f9cbcea31ad637eeff4c… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
f18a60125cd5…5acb2b3d0b4e coinbase1250