Dear Friend

Recording by 北岡秀一(涼平).

Recording identifiers

ISRC
JPB600240102
CopyrightID (CopyrightChains transaction hash)
0x460217293522301b9af5fef9ff37f1b938f811474a2a53eb23250c3b99ed67ca
Copyright registration time
2026-07-06T20:25:48+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:22:41Z
Bitcoin block
957120
Canonical record hash
sha256:84fb29513832ff388565ef662f475c85cff42d8ca6fa7abb49ddb71e93e7238c

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.