ISRC DEF059203700
Verified recording
DEF059203700 is “String Quartet In F Major, Hob.III No.17, Op.3 No.5 - "Serenade": II. Andante cantabile” by Roman Hoffstetter,
registered on the CopyrightChains blockchain with CopyrightID
0x645e62b6ab392f33ae0c03d61e36d66bd2e02ee707ca7cf00a07e7039956e5d4 and independently timestamped
in Bitcoin block 953520 on 2026-06-13.
Verify the canonical record, hash, and Bitcoin attestation at
https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059203700.
Recording identifiers
- ISRC
- DEF059203700
- Title
- String Quartet In F Major, Hob.III No.17, Op.3 No.5 - "Serenade": II. Andante cantabile
- Artist
- Roman Hoffstetter
- CopyrightID (CopyrightChains transaction hash)
0x645e62b6ab392f33ae0c03d61e36d66bd2e02ee707ca7cf00a07e7039956e5d4
Dual-chain proof evidence
- Bitcoin-attested timestamp
- 2026-06-13T13:32:09+00:00
- Bitcoin block
- 953520
- Canonical record hash
sha256:5a3ca62a70a94261d4b0a08917e7c157b90913bdfaa9df03bfc95d9842fad681- Verification API (6-check server-side result)
- https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059203700
- Bitcoin block existence check
- https://blockstream.info/api/block/953520
Full record
Track page: String Quartet In F Major, Hob.III No.17, Op.3 No.5 - "Serenade": II. Andante cantabile · Machine-readable JSON-LD