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
sha256:3d6e795535b10d1d48b3c6f0313ce2cdb31651f24aa17404522b38b3243b0b27

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.