春はどこから来るのか？

Recording identifiers

ISRC

JPU901800870

CopyrightID (CopyrightChains transaction hash)

0xc978a1232503e7c517204f9881bccbb61bf81aa4ed856f59d2b1194c08709114

Copyright registration time

2026-06-19T21:16:25+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-08T03:22:41Z

Bitcoin block

957120

Canonical record hash

sha256:a5fff30602f1e873d75575d12edaae653db615daad73e2df2b6c5df72b78264b

• 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.