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

Block 18703

Hash
000001066854790d1ec55619d441cbb78319f6d0dfb823060cc65659454a68fa
Confirmations
22803
Time
2026-10-09 16:22:56 UTC
Median time
2026-10-09 16:14:37 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
44e36ad501fff18138b6e7f16104da34c0538e8763dceb669e202db6e86af61c
Previous block
000000a66cb3b23cdceec0dfa60351bf94da9b88c23df6424878154d4aca67d9
Next block
0000011645e7ea8823cfff7c58c440e6d5149d2c3a2f8e1cfd2ba4792ba83e5b

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 18703 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
5f340e50fa9165f567bf20171c0c9669… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
44e36ad501ff…2db6e86af61c coinbase1250