なんだっけ

Recording by Ai Otsuka.

Recording identifiers

ISRC
JPB602102107
CopyrightID (CopyrightChains transaction hash)
0x592917f631450551c1efe0e9d71eb9ea22da5fc94cd34a7f35e51eeaab06efef
Copyright registration time
2026-07-29T19:54:41+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-29T21:09:47Z
Bitcoin block
960144
Canonical record hash
sha256:237d9c5ba5fb8e95873a855531645572d5441c1e13bc20e7556c41e88c65f933

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.