Gunars Upatnieks (born 8 October 1983, in Jelgava) is a Latvian double-bass player and member of the Berlin Philharmonic. He is prize winner at numerous competitions, including the ARD International
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52776fed4d7da8b97d1591dbb7a2eadb3ffd4ffbb2e99986bf9552a70ad2e22. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cc8a7bbb-e991-4c5d-a95a-4ff94686618a.json and https://artists.proofprofile.net/proofs/artist/cc8a7bbb-e991-4c5d-a95a-4ff94686618a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lieder ohne Worte I, Op. 19b: VI. Andante sostenuto "Venetian Gondola Song", MWV U78 (Arr. Ottensamer for Clarinet & Strings)
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014d3183c7c2cd21182479429349ae34e137d578ae607328ea989a7aae0b7a97. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEN962004660.
Lieder ohne Worte VIII, Op. 102: III. Presto, MWV U195 "Tarantelle" (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6bf1ec45d811004449aa1d933e8f9b5472e11bd59e85562e591396df6ee5a6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962004670.
Lieder ohne Worte V, Op. 62: VI. Allegretto grazioso, MWV U161 "Spring Song" (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e9ccaf816d5e54dc7489c38cad682766b60815bfcb871e2df65fc514113508. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEN962004680.
Lieder ohne Worte II, Op. 30: IV. Agitato e con fuoco, MWV U98 (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57ddfd237b9f3234a01520b30e1dbf8f34ead7cf92fabaf091b8763a64a1e44. 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/DEN962004690.
Lieder ohne Worte VIII, Op. 102: IV. Andante (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9332378ce1dee68ea7233d4d0e6cd20a22c0d3e0e0f51fe39f50fe25572804b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962004700.
Lieder ohne Worte VIII, Op. 102: V. Allegro vivace, MWV U194 "The Joyous Peasant" (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbc415543914cb299f8c38190cab86088c209068a065148dc8577f2360a33e7. 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/DEN962004710.
Lieder ohne Worte IV, Op. 53: V. Volkslied. Allegro con fuoco, MWV U153 (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeeb469a712712d0e420935a730fad11bf33604ebba3830376d2a856fa21aa0. 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/DEN962004730.
Lieder ohne Worte II, Op. 30: VI. Venetian Gondola Song. Allegretto, MWV U110 (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75507130c85ef61e33079f969d29238911266e540e9376df20738651a96a3e18. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962004750.
Lieder ohne Worte VI, Op. 67: IV. The Bee's Wedding. Presto, MWV U182 "Spinning Song"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f56f16dab5ed6b9a89ac33ce57face0f607bf7006eff00b01f108be9f4554c1. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN962004760.
Mendelssohn: Lieder ohne Worte, Op. 102: No. 5 Allegro vivace (Arr. Ottensamer for Clarinet and Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbc415543914cb299f8c38190cab86088c209068a065148dc8577f2360a33e7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEN962004710.
Mendelssohn: Lieder ohne Worte, Op. 30: No. 6 Allegretto tranquillo "Venetianisches Gondellied" (Arr. Ottensamer for Clarinet and Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75507130c85ef61e33079f969d29238911266e540e9376df20738651a96a3e18. 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/DEN962004750.
Mendelssohn: Lieder ohne Worte, Op. 62: No. 6 Allegretto grazioso "Frühlingslied" (Arr. Ottensamer for Clarinet and Strings)
Lieder ohne Worte VII, Op. 85: II. Allegro agitato (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c884fd134244642853d29b6dab66cd2e4a6dc32ff97f81647f99633a142479. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:09:31Z), 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/DEN962004720.
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
Lieder ohne Worte VI, Op. 67: V. Moderato, MWV U184 "The Shepherd's Complaint" (Arr. Ottensamer for Clarinet & Strings)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d52240b79df8872782ce3a816666309018d8ebf6e02c0275363337ea8199c1. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEN962004740.