はたらくうた

Recording by Kana Adachi.

Recording identifiers

ISRC
JPU901903312
CopyrightID (CopyrightChains transaction hash)
0xe0d5ce869d768d6d1170a694b5fc42cdfa937da066676c2b3b77d3fe80149db6
Copyright registration time
2026-06-18T06:50:02+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-02T03:30:09Z
Bitcoin block
956302
Canonical record hash
sha256:717202a6d774eda1dee2a9138a5f68df653d744f185922eaeed30edacff8e61b

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.