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

Block 18961

Hash
000000869bd81f764ee3e8ad403dbf940fd1d1aaa1d127d9ee876d1bc9a30cba
Confirmations
22715
Time
2026-10-09 23:33:18 UTC
Median time
2026-10-09 23:24:07 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
2e50336b106ddcb6d7fbf0898faeacd799f0f86765b72678bb73f251004f2011
Previous block
000000e41ed5d613b4080c91cab873a8f72242f5ed19ab5398731cea0f29d3fd
Next block
0000000d384b9a107e77279c088adfe0a5b8e6613316a6b8edfd1df3957c9483

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 18961 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
100df22f03d578a6807fa7eff1a9d43f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
2e50336b106d…f251004f2011 coinbase1250