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

Block 19681

Hash
0000005da33ee43a17a75776362a7bbadd2f802a6cbd26591bcc600f8fab50cf
Confirmations
22452
Time
2026-10-10 19:48:49 UTC
Median time
2026-10-10 19:40:31 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
fcb7e978c3219fd35342c6d0069640caf6b831471643825e195e451a3940b63a
Previous block
000000bcde55023bd71f55d9fadb9caae4c22776a33b7015ec2e135a4d0bcc88
Next block
000000bacee9a6599e519995d42177fe6d1d5d5d047625cf3165615b55508731

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 19681 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
5431ae1596baaf035667c02ae0a5bc71… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
fcb7e978c321…451a3940b63a coinbase1250