String Quartet No. 15 in D Minor, K. 421: I. Allegro

Recording identifiers

ISRC

HKI199494809

Release date of the album this recording appears on

1994-09-05

CopyrightID (CopyrightChains transaction hash)

0x7e094b18b9bc9a6f5690f6ca32ca6d2af65e33251d27fa27d85b5ccaaea15c8e

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-08-01T02:22:04Z

Bitcoin block

960497

Canonical record hash

sha256:9d983f3299c6a3e9806a16fae0f13f386d45fe2d20ba9ea9ef85104fc0f4419f

• Verify the CopyrightID on CopyrightChains
• Verify the Bitcoin block independently
• Read the machine-verifiable OTS result
• Recording evidence summary for ISRC HKI199494809

What this proof establishes

This recording was released in 1994, 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.