Last Friday Night (T.G.I.F.)
Recording by Katy Perry.
Recording identifiers
- ISRC
- USCA21001264
- CopyrightID (CopyrightChains transaction hash)
- 0x9bb4d72b733fbda87b3f4695f5eaa94a722fc577cdfe3c36f55dcba34d5aa5c0
- Copyright registration time
- 2026-06-01T04:36:12+00:00
OpenTimestamps proof evidence
- Bitcoin-attested timestamp
- 2026-06-13T12:47:07Z
- Bitcoin block
- 953513
- Canonical record hash
- sha256:6a768cc87ad8aaf9910e3b33853870a7be45b62fdd0e26ccf580e956ecf43468
- Verify the CopyrightID on CopyrightChains
- Verify the Bitcoin block independently
- Read the machine-verifiable OTS result
- Download the anchored registration record (its SHA-256 is the canonical record hash above)
- Download the OpenTimestamps proof (.ots) for that record
- Recording evidence summary for ISRC USCA21001264
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.