7TH FLOOR

Recording by Yoko Ono.

Recording identifiers

ISRC
USSUX1300009
CopyrightID (CopyrightChains transaction hash)
0x4565a00fa5eac6dd5ead6a68340bc5a52a63a0de8d765b8edb53686fbec74bea
Copyright registration time
2026-07-30T01:11:52+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-30T01:32:48Z
Bitcoin block
960185
Canonical record hash
sha256:c07db35bfb53ba8bbe46a6be23dabeeebdd06573e14ff396284ae9695cd91583

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.