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

Block 21861

Hash
000000afa0ca5a05fa5a2ec55ac2f6eb52c293c25babb771474d330982be26e0
Confirmations
19451
Time
2026-10-13 08:21:14 UTC
Median time
2026-10-13 08:12:48 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
0b6b4ca5b21ed9646daac6e2a483776e7a6b7a52140b10e718a66915fbe56127
Previous block
00000036d841b3fd26b28cf058fa9b3c978dcd766e63acc8b3d80b1cf0fc7284
Next block
0000011a687f7136eed10ab09671601f3cc2a59d6097e22c03ba9a6e53e1de6a

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 21861 is at or above the activation height 20000: nodes that enforce M2 accept a block there only with a valid ML-DSA-44 block signature.

The node behind this site enforces M2 and holds this block, so its block signature passed the node's check.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
4789b0e52114a4748952f70b168e0c44… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
0b6b4ca5b21e…6915fbe56127 coinbase1250