ISRC NLA507100153
Verified recording
NLA507100153 is “String Quartet No. 11 in F minor, Op. 95 - "Serioso": 4. Larghetto espressivo - Allegretto agitato” by Ludwig van Beethoven,
registered on the CopyrightChains blockchain with CopyrightID
0x74926706ee272ebec3fa223d723a5bc44fdf25e60e0c23fe516350caf2853c88 and independently timestamped
in Bitcoin block 960468 on 2026-07-31.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507100153.
Recording identifiers
- ISRC
- NLA507100153
- Title
- String Quartet No. 11 in F minor, Op. 95 - "Serioso": 4. Larghetto espressivo - Allegretto agitato
- Artist
- Ludwig van Beethoven
- CopyrightID (CopyrightChains transaction hash)
0x74926706ee272ebec3fa223d723a5bc44fdf25e60e0c23fe516350caf2853c88
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-31T21:25:57+00:00
- Bitcoin block
- 960468
- Canonical record hash
sha256:402f13d826f4a8320c80b14b7a32d8a1fc61b52b006a9da0adfc6e2f8588973e- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA507100153
- Bitcoin block existence check
- https://blockstream.info/api/block/960468
Full record
Track page: String Quartet No. 11 in F minor, Op. 95 - "Serioso": 4. Larghetto espressivo - Allegretto agitato · Machine-readable JSON-LD