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

Block 19398

Hash
000001130e61149246b29c62b2ec2c6efa5d240f36ce8ea15fde4ffe6232e678
Confirmations
21805
Time
2026-10-10 11:52:51 UTC
Median time
2026-10-10 11:44:54 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
ef9b57601df740801ac84ccb08300846d2eb1daefef4d699c6154cc7f1c2125d
Previous block
0000000f153b5d87dac8cf85646122055b7f9c85907c94bb3f228a1c68b903a6
Next block
000000629332b38c286b1fc6fbe965b19ed6668fdb92b47446f0823f4243c97e

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 19398 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
cfd3781a6d0f9180d272d57ff00e0832… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
ef9b57601df7…4cc7f1c2125d coinbase1250