Both Sides Now

Recording by Herbie Hancock.

Recording identifiers

ISRC
USUM70746299
CopyrightID (CopyrightChains transaction hash)
0x3bc3a64668bc1c43e5fb045a25bb438382d4779dd51a5c0c2f22bb8686c952da
Copyright registration time
2026-06-11T00:15:17+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:c89fc5fb57fe6ce16039b1faa9ae2240d8e700393f77a9df3eeb0c4bb5ca0524

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.