School - Live In Del Mar, California/1991

Recording by Nirvana.

Recording identifiers

ISRC
USUM72114614
CopyrightID (CopyrightChains transaction hash)
0xeac8b1ffe467d401c62f35a9526e60c0fa455c257f1fff6805ce25f653b8af5f
Copyright registration time
2026-06-12T00:17:30+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-06-13T13:32:09Z
Bitcoin block
953520
Canonical record hash
sha256:e2aa2c53f654aea8578fa6b4c51468c2fab8754d631ac57d7e6bf457559e9357

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.