String Quartet No. 2, Op. 26: II. Adagio angoscioso

Recording identifiers

ISRC

HKI190879106

CopyrightID (CopyrightChains transaction hash)

0x6f58a01317f823a422e977e86ab2771aa012a24b2d207a5ecc8d5c669ffeb3fa

Copyright registration time

2026-07-31T13:59:12+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T15:20:15Z

Bitcoin block

960418

Canonical record hash

sha256:df5ce799307b8d50446154749c55f7098ee14b52ff2bff0e3dc049aec3e47c07

• Verify the CopyrightID on CopyrightChains
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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.