California Gurls

Recording by Katy Perry.

Recording identifiers

ISRC
USCA21001135
CopyrightID (CopyrightChains transaction hash)
0x7c8518994e0a263260199b6c8ea7c71bf935ac1a3357393d90345a1fc7260ccd
Copyright registration time
2026-06-01T04:21:35+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-06-13T12:47:07Z
Bitcoin block
953513
Canonical record hash
sha256:8eebf26272d443fe74b286b63be3405097c462d9d5e0a1c5d34dcb72896509a4

What this proof establishes

ProofProfile's artist catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record. A release date for this recording is not published here, so the dates stated above are what this page attests.

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.