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

Block 18487

Hash
000000c1bbca6e723aa2f91f23107185f000f074da13e7dd02b2cca5e324eaa4
Confirmations
22005
Time
2026-10-09 10:27:12 UTC
Median time
2026-10-09 10:18:52 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
de777871f1edef2ba2c5833b77d9869a5f81110a46ebecf47c6b5ef1c68af132
Previous block
000000d14d74ac7d13888c816e6ab6ba0b55cd9d7a6bbfba45a3656ac6a38067
Next block
00000080e5a2952bc8a875ddcba53fdf5b9ec7bf65dc0b0a4beb1709036093ea

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 18487 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
9fb220d3c4286fe6eb5b0ee975713d33… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
de777871f1ed…5ef1c68af132 coinbase1250