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
2026-06-13T13:32:09Z
Bitcoin block
953520
Canonical record hash
sha256:2016f7fa996f0a0d843404bd2ae4d1cc3a9e1093b3ccc98fd6684da597d5e24c

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.