It Ain't Necessarily So

Recording by George Gershwin.

Recording identifiers

ISRC
USBC10900494
CopyrightID (CopyrightChains transaction hash)
0xcb3e8f87b9d1f8874b26c4e3f0a240e05508ea0f31994e3a5bda8acd369d1856
Copyright registration time
2026-06-21T21:07:41+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T03:30:09Z
Bitcoin block
956302
Canonical record hash
sha256:15e6e28969671c67a22b8284c55557a8448c111986a7670a817b6b23d56d28fd

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.