僕は頑張る(入山杏奈、大島優子、柏木由紀、川栄李奈、小嶋陽菜、島崎遥香、高橋みなみ、横山由依、渡辺麻友)

Recording identifiers

ISRC

JPKI01318284

CopyrightID (CopyrightChains transaction hash)

0xefc8c18221f3bf83e00e84d8f7dfdb5e903bcfc9862de763c90da5cff96dc127

Copyright registration time

2026-06-27T21:21:28+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-02T03:55:08Z

Bitcoin block

956304

Canonical record hash

sha256:10d5fe758a28c31c54588be8ef2daeca2d1eb5cb662ce371980387a4e10862c5

• 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.