手紙を書こう
Recording by Wataru Takada.
Recording identifiers
- ISRC
- JPKI07251951
- CopyrightID (CopyrightChains transaction hash)
- 0x9f2c3783d658561e9063d227f1699538a8a0f4bdc4bddd9f2318473bca03b89e
- Copyright registration time
- 2026-07-07T20:42:55+00:00
OpenTimestamps proof evidence
- Bitcoin-attested timestamp
- 2026-07-08T03:39:04Z
- Bitcoin block
- 957122
- Canonical record hash
- sha256:842095f4b85314e8e517a6c834cb971aaba48d6e39152f9b356a71aeadf6ef92
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.