What Is and What Should Never Be - Rough Mix with Vocal

Recording by Led Zeppelin.

Recording identifiers

ISRC
USAT21400454
CopyrightID (CopyrightChains transaction hash)
0x92596e6c7ea98f77e0a6ca01643f7d920d77035a58e91391619c5954467e0933
Copyright registration time
2026-06-08T10:43:56+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-06-13T13:32:09Z
Bitcoin block
953520
Canonical record hash
sha256:05e6afdee8bb096bd7abab131ad1dc6a85d100fad22695afd7e14f607325ece8

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.