Tsumasakizaka

Recording by Ryuun Nagai.

Recording identifiers

ISRC
JPPC07950647
CopyrightID (CopyrightChains transaction hash)
0xb773d14d235af2d779f2098e0e0086be0d26d3507a58afe90d453100aba2a06c

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-30T21:35:24Z
Bitcoin block
960317
Canonical record hash
sha256:c2b154c7c5ef146f7da894a5215bd8b629b6fc314c7b0c1e8939494dff350f96

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.