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

Block 18538

Hash
000000752ffbc5dc92b422aac315e0cd0f5399accb69338af95cc50a6a46f5c0
Confirmations
22313
Time
2026-10-09 11:51:49 UTC
Median time
2026-10-09 11:43:42 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
ba238e3991a848b00b0f2f7302b9d06c36e5c195df04f38aaad033d526521384
Previous block
0000003ba3b3f5e3a28139fe92414a15ef9d42f9bb3e0596346d8e21fc4892a7
Next block
0000008533173a4a0a484555238343a257c919c74aa2e8ff772a4e629470711c

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 18538 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
a6db323b25161b7ca9596b7aa19e6a34… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
ba238e3991a8…33d526521384 coinbase1250