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

Block 18720

Hash
0000006fa21762ca0cc945e43172fca30632c27dbc48404893705a2b813ad776
Confirmations
23342
Time
2026-10-09 16:51:28 UTC
Median time
2026-10-09 16:42:57 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
64a0e61ca37329d6a13a40551c871b50b27fc399c2d639de1c857554ef718060
Previous block
0000002b5a4b3292c4c2c9494299a6e8ad2218dfbd44a6da894b266968574d93
Next block
0000008c39f396155e96a841d24d83a4a7239979e582217b812fd27ef8260d4c

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 18720 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
8ec188c5d79a4b769d20329559d4b792… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
64a0e61ca373…7554ef718060 coinbase1250