いつか聞いたあの音色

Recording identifiers

ISRC

JPW562003107

CopyrightID (CopyrightChains transaction hash)

0xe6758cf808b8a1b4334a34b1f5a9ee7ac39957680067918d60734d0bed170ee0

Copyright registration time

2026-07-31T20:38:53+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T21:25:57Z

Bitcoin block

960468

Canonical record hash

sha256:107e77a923f426dd55aaf375c5b7b4c222d0d105408ff57108b46616c44d6794

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result

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.