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

Block 18691

Hash
00000065f4cafc95274e326883e07a9b27f01c7cc1ba7b33356ba3aa98515efa
Confirmations
22189
Time
2026-10-09 16:03:11 UTC
Median time
2026-10-09 15:55:14 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
7ae0f290251c5cbdfc224a10b324adf94e6c4790ef4ed9c7e28d898809e45d09
Previous block
000000e64a22a771e4f2b28c60a50130902a5a4ed1607d1a147c4698c2769892
Next block
000000b40cf6b086d51b536a39d28ba37c41e4169099376a36decfd5a8971c40

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 18691 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
e5d71412870929cfad7143f4f18cfdf6… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
7ae0f290251c…898809e45d09 coinbase1250