ISRC DEF059405003
Verified recording
DEF059405003 is “String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante e tranquillo” by Ludwig van Beethoven,
registered on the CopyrightChains blockchain with CopyrightID
0x34ea86c08949ff5046ba66e6ce6d97ab1fc01508287fba8269f30abaf4418c67 and independently timestamped
in Bitcoin block 960298 on 2026-07-30.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059405003.
Recording identifiers
- ISRC
- DEF059405003
- Title
- String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante e tranquillo
- Artist
- Ludwig van Beethoven
- CopyrightID (CopyrightChains transaction hash)
0x34ea86c08949ff5046ba66e6ce6d97ab1fc01508287fba8269f30abaf4418c67
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-07-30T19:26:00+00:00
- Bitcoin block
- 960298
- Canonical record hash
sha256:cbe3f02c360dc78057d5118fabe31416fd1f9cd60ff6d9e78d86d165d72bb7f3- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059405003
- Bitcoin block existence check
- https://blockstream.info/api/block/960298
Full record
Track page: String Quartet No. 16 in F Major, Op. 135: III. Lento assai, cantante e tranquillo · Machine-readable JSON-LD