String Quartet No. 1: II. Brincadeira (Joke): Allegretto scherzando

Recording identifiers

ISRC

USKC60910140

CopyrightID (CopyrightChains transaction hash)

0x31fff528f388f3ce8a9cce20523b1ae06be1ac0d78169a3d5696449e0b50aa6b

Copyright registration time

2026-07-30T22:05:49+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-30T22:27:30Z

Bitcoin block

960321

Canonical record hash

sha256:d4b124a0f4eeb6cb5f8ea322cc54c8f85988d257e60d2216a253c22e8718eb3f

• 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.