Manfred Cordes (born 1953) is a German conductor of early music, musicologist and teacher. He is professor at the Hochschule für Künste Bremen and was its rector from 2007 to 2012.Manfred Cordes an de
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 0x8a19b79970cf2910b278b101cc97d959661e6e54c94b192ebf5e17115f0009bb. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cc51a96-7720-47a7-9616-918c93502636.json and https://artists.proofprofile.net/proofs/artist/4cc51a96-7720-47a7-9616-918c93502636.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x67341228cc35e7e75a3bf33853b601e3c46ef73b1274a8095036e57e2b55f826. 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/DEB201059001.
Praetorius: Missa in Festo Sanctissimae Trinitatis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ab92fd875144d0210e67563d475452bd45e8296f601a0abe76fc494eda609a. 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/DEB201495406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c432f58bff54f28cbd9953b15c6925c3cab9f9bd6b5787225b75fbaeac7fd2c. 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/DEB201495408.
Missa in festo Sanctissimae Trinitatis: V. Credo. Wir gläuben all an einen Gott
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552ff01a1c422c99de4e0a12147817a067faff47717582f05e4a9aa8d926a324. 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/DEB201495409.
Missa in festo Sanctissimae Trinitatis: VII. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e7240e10f85ebb8f1cc8a49050b571952969b0bbd330a394a46ba1e4a5440a. 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/DEB201495415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165b65f1b2c3d701335beb42ec9afed1884c540eb9b62757a097bfd64b78ce2a. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/DEB200824512.
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
Missa in festo Sanctissimae Trinitatis: I. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a682cedda3febb1ca53d72f14dd6c1faedaa8ee476b03da7549f4c6a94cba6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEB201495402.
Missa in festo Sanctissimae Trinitatis: II. Christe eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906e611f11ac163d60b3f34feeecdc68191a3fa0a8907fc62e809df0b840a83e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEB201495403.
Missa in festo Sanctissimae Trinitatis: III. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7666bb5af3b18295d4c83d2922b9c0d8218ce2345576948f5ef4ccb2d61a73. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEB201495404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dc9a2083275bc942dda354112093eb25331e490ed58a32503652f601ac529e. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB201495411.
Missa in festo Sanctissimae Trinitatis: VI. Sanctus, Benedictus "Sanctus Dominus Deus Sabaoth"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e2c87f414665e2c4f7632f58b9fc0824b1628d53694a2d5a1af777e6b6193f. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEB201495412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2730b74e23ac40b6c9b105c1e8f0ae927b49adb7fe09f2ccc7b4578331987960. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DEB201495413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d45e5945a281587605763f693fec9d3c60d07bb5578c561fd242c4428c4c87. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB201495417.
Felician: Il Sagrifizio d'Abramo & Miserere
Rore: Missa vivat felic Hercules & Motets
Morales: O Magnum Mysterium (Christmas Motets)
Taffel Consort - Instrumental Works by Thomas Simpson & William Brade
Geystliches gesangk Buchleyn (Excerpts): No. 1, Nu bitten wir den heiligen geist
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c348b786bb8671841da0768392322c375ac942bb479f3cdee9bf84149632e31. 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/DEB201613401.
Psalm 143, "Herr, erhore mein Gebet": Herr, erhore mein Gebet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc05df0aff552566626b9d728c8a7ca6d3e141ca558a06f2a7f33e9f70a7a9e. 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/DEB200818119.
Selle, T.: Auferstehung Christi (Die) (Historia - Sacred Concertos and Motets for Easter)
Cornelis Schuyt: Madrigali nuptiali · Padovane e Gagliarde
Musik der Hansestädte, Vol. 1: Musik aus dem alten Stralsund
Telemann, G.P.: Vereint Euch, Ihr Burger, Und Singet Mit Freud / Freiheit! Gottin, Die Segen Und Friede Begleitet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519d82ac8a3b748f1e56108ef6a538aa774284e24a3c7bdb0fb2bdd818216fe3. 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/DEB200732702.