Shiranakatta (I Didn’t Know)

Recording by Yoko Ono.

Recording identifiers

ISRC
US38W1728316
CopyrightID (CopyrightChains transaction hash)
0xe829dbc2f0f277cf5de55e4243a00ac759c7350dc50774f094df90332e03125c
Copyright registration time
2026-06-26T18:42:58+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T05:09:12Z
Bitcoin block
956312
Canonical record hash
sha256:e1b2eae5d5905acd87a0c950ae5e6924b97907d9ca3b19f8d132d70ce4b052f7

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.