Hamanako no Theme ”Tokujyou unagi ha yuuwakusuru”

Recording identifiers

ISRC

JPK632102113

Release date of the album this recording appears on

2021-03-31

CopyrightID (CopyrightChains transaction hash)

0x638647e5d5cc23a3222ae70d11fe621208f176f0e5035934c77f3ae45d5f7a9f

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-29T19:35:34Z

Bitcoin block

960138

Canonical record hash

sha256:f3fa26a65a28f2297bdc1651417a710291aae9e308f7b41558255a5db743105c

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC JPK632102113

What this proof establishes

This recording was released in 2021, before generative AI. ProofProfile's catalogue derives from the pre-2022 AcousticBrainz and MusicBrainz source corpus, and 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.