Durations 2 (1960)

Recording by Morton Feldman.

Recording identifiers

ISRC
QMQQH1910036
CopyrightID (CopyrightChains transaction hash)
0x3ade5d07d7edb137ba24662951932ea0945dd13c739679bd640aeea858b9d00a
Copyright registration time
2026-07-07T13:42:01+00:00

OpenTimestamps proof evidence

Bitcoin-attested timestamp
2026-07-08T03:20:19Z
Bitcoin block
957118
Canonical record hash
sha256:b189b433a280958a8dd6b3889357840f53f92b840d5fb36d0549d1fa734d8f6a

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.