Olaf Bär (born 19 December 1957) is a German operatic baritone. Life Bär received his musical training in his home city of Dresden, studying at the city's Hochschule für Musik. His career has conce
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 0xccc7879389b8a71d7b109bd1502351156cf79a54dfdba5348bc094143ba6d39c. 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/0ed2545c-f118-46ad-b305-0c78cdfa9168.json and https://artists.proofprofile.net/proofs/artist/0ed2545c-f118-46ad-b305-0c78cdfa9168.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, J.S.: Advent Cantatas BWV 61, 36 & 62
Nun komm, der Heiden Heiland, Cantata BWV 61: No. 3 "Komm, Jesu, komm zu deiner Kirche"
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 0x10fddb096d4eb6de53c43972452ae8f275aec6d6cb54a2bc37bf384ab134c99d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF059202043.
Nun komm, der Heiden Heiland, Cantata BWV 61: No. 5 "Öffne dich, mein ganzes Herze"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9850f1382139ccd7e66df087cee8b42f13ad300286350b3b197d18f37d34a528. 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/DEF059202045.
Schwingt freudig euch empor, Cantata BWV 36 / Part 2: No. 6 Chorale "Der du bist dem Vater gleich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeeedd014b283fffa3376d7f7358f55e46207176e105021bd64f8910c06ba9c. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEF059202056.
"Nun komm, der Heiden Heiland", BWV 62: No. 1 Chorus "Nun komm, der Heiden Heiland"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41dc49c0df3ea3d44c1ec5ba3e6af30c73ee6c3b2b99e708b332427e6e77426b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEF059202061.
"Nun komm, der Heiden Heiland", BWV 62: No. 2 Aria "Bewundert, o Menschen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4744ddf757c4564e133a0130e1b0a02cf9c1fce148dd379899df86287b4dba. 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/DEF059202062.
"Nun komm, der Heiden Heiland", BWV 62: 5. Recitative "Wir ehren diese Herrlichkeit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd434ad51a2f59f7762102ec2c616c6443c5b1e967102b88a1cbb1f6bee7ac75e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF059202065.
Nun komm, der Heiden Heiland, Cantata BWV 61: No. 4 "Siehe, ich stehe vor der Tür"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35dfc87cfd3f949a76e8c5b9f26e18476192d0e070c936f6d8b0003df63ee42. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEF059202044.
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
Nun komm, der Heiden Heiland, Cantata BWV 61: No. 6 "Amen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325daf3e9a1665f4d8b007bcd25a3641a3fd87fb03e691974adb0e7a1ad8250d. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/DEF059202046.
"Nun komm, der Heiden Heiland", BWV 62: No. 3 Recitative "So geht aus Gottes Herrlichkeit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f197a47e3a7e802ae13ed9b7d6ed1428ec9a9388bb7a767d4ea1c0ea960e30a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEF059202063.
"Nun komm, der Heiden Heiland", BWV 62: 4. Aria "Streite, siege, starker Held"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12b5cbb1dc7e902fa34b1aafe81bdb986de0277442313dff692ab2c2185a3ba. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEF059202064.
Die Zauberflöte, ZWEITER AUFZUG, Nr.10 Aria & Dialog: Aria con coro: O Isis und Osiris ... (Sarastro/Priester)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377f10828dc2b1aec9a1f92581865a7b0779dfe408c94695afe4f2798adb11c. 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/GBAYC9001019.
Reger: 5 Neue Kinderlieder, Op. 142: No. 3, Maria am Rosenstrausch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6082d6341f18ac92e6340596fd1cc7e580efe0edca2c032851c9ddda1f09a877. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBAYC9602977.
Die Zauberflöte, K. 620, Act I: Der Vogelfänger bin ich ja (Papageno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1728e4d28e8ac55b1dfc571e1bd82e220caab86187c94eac07024533d0b56c24. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBAYC9704971.
Mozart: Die Zauberflöte, K. 620, Act 1 Scene 13: "Die Weisheitslehre dieser Knaben … O ew’ge Nacht!" (Tamino, Sprecher, Priester)
Sir Roger Norrington/London Classical Players/Anthony Rolfe Johnson/Andreas Schmidt/Dawn Upshaw/Guy de Mey/Beverley Hoch/Olaf Bär/Catherine Denley/Catherine Pierard/Cornelius Hauptmann/Nancy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ead786a04f955bd600fb90d6a4c55c5fc6b07b1fc791639021545cd1b73c9b. 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/GBAYC9001007.
Fantasia in C Minor, Op. 80, "Choral Fantasy"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2f2c08d101bee54f7592fef6b8308721b2c8417253a85b50b6276b0deef84. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US2TL0924004.