Surabaya Johnny from Happy End

Recording by Kurt Weill.

Recording identifiers

ISRC
USSM18500128
CopyrightID (CopyrightChains transaction hash)
0xcb2d1d73b7c46724f70b1b4e1bac16c4db80349792fffb5e5f30fd39e71410ee
Copyright registration time
2026-07-07T09:12:53+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:e7ecc324522dfd40954db1ca3854faa72a46f55c0aec5929cfff30f0c5f2d1c7

What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record.

CopyrightChains and Bitcoin OpenTimestamps make the exact committed record independently verifiable today. The cryptographic proof does not by itself establish authorship or ownership of the underlying recording.

Read the complete pre-generative-AI provenance and verification method.