The Kuss Quartet with Jana Kuss (violin), Oliver Wille (violin), William Coleman (viola) and Mikayel Hakhnazaryan (cello) is a Berlin-based string quartet. It was founded in 1991 at the Hochschule für
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e5a2bc4e9753ed2627b87fbd364c5b97309b7c537ff8baa1aabad6b157c6ee. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ced7ef7-c5da-44ab-afee-aa87891dbf80.json and https://artists.proofprofile.net/proofs/artist/7ced7ef7-c5da-44ab-afee-aa87891dbf80.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Schubert: String Quartet No. 15 - Berg: String Quartet
Thème russe - Tchaikovsky, Stravinsky, Schnittke, Glazunov, Scriabin, Rimsky Korsakov etc
Mozart & Mendelssohn: Music for String Quartet
Schubert: String Quartet No. 14 "Death & the Maiden"
The Echoes of Women - International Women's Day 2024
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e8e5fe52dc492d221b433c55b888e551e172f47b3c18a9df9586d2b9a2a0f7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962131410.
O virtus sapientiae (Arr. Sarah Kirkland Snider)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f8843e6b13cf359043728610f7b07df981db44750bbd29104f540499063e83. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962131402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e8e5fe52dc492d221b433c55b888e551e172f47b3c18a9df9586d2b9a2a0f7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962131410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f8843e6b13cf359043728610f7b07df981db44750bbd29104f540499063e83. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962131402.