Ruben Drole (born 1980) is a Swiss operatic bass-baritone. Life Drole was born in Switzerland to a Slovenian father and a Spanish mother. He studied with Jane Thorner Mengedoht at the Zurich Univer
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 0x4301e9d70b9e417bf710dc61db403fe0a168d3cb582dfffe440a28d3d3c2f6f2. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a964b9b-c4a5-4d45-b09c-a59dbff15394.json and https://artists.proofprofile.net/proofs/artist/2a964b9b-c4a5-4d45-b09c-a59dbff15394.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Missa Solemnis in D Major, Op. 123: I. Kyrie
Beethoven: Missa Solemnis in D Major, Op. 123
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 0x40f64ab49304f2d31dc0cdee4fec03c34082327c068384926d926dcff52850f4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11600999 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: II. Gloria: Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3f8c1e600c18cfbfef31aa88ca19026f3af519bee80c765b3ad5b56c4a3278. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603160 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: II. Gloria: Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a19f7a39dae85fea4713d36ef08b0d7308f1d715d0329836844c7c5260f2b7e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603161 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: II. Gloria: Quoniam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06917c0328770adaabacaee788350983667c61b30ca2b389d8cb40c9a12daac. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603171 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: III. Credo: Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482c3ec31e92c81fed18c97466c1699ebd33b534dc5a363c78e847c1ff66f04a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603162 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: III. Credo: Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf146de472ae02c5a2cb42b4354a0dc54620e6b91b1cd234de390ba8a7e14e139. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603163 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: III. Credo: Et resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670d3110d07ee9148dea48f7a7a39e2bf1abb8bd8ef0467932780d76944bcb8e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603172 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: IV. Sanctus: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e5820d43c12a91f97bdbbd63364e9dfffd5cdb3132d79d174da309d9ca23f7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603164 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: IV. Sanctus: Praeludium - Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf244cbf9d0de43b45c724a9957508743abdf59e33e406cf5a827aa14dc44be01. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603173 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: V. Agnus Dei: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c21afb93f5444b4e4ee420bbd9cd6a7c7ad37d31bb0b7df0312b82d5d0316ba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603165 — a six-check JSON result.
Missa Solemnis in D Major, Op. 123: V. Agnus Dei: Dona nobis pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6bf3b62107b918e18f61a45a14af513054a50a2dbb98bb06919c2adc9bebf7c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM11603174 — a six-check JSON result.