thumb|Image of Felix Friedrich Felix Friedrich (born 1945) is a German organist, church musician and musicologist. Life Friedrich was born in 1945 in Hochweitzschen near Döbeln. He studied church m
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 0x05d1bbea2e4e136d7070368f3ad3bdb0334c501ec3ef27e088719ec9fb9ba88a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/839577b0-9c52-4366-9da2-3c553c0b8475.json and https://artists.proofprofile.net/proofs/artist/839577b0-9c52-4366-9da2-3c553c0b8475.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johann Ludwig Krebs: Complete Works for Organ, Vol. 8
Johann Ludwig Krebs: Complete Works for Organ, Vol. 11
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 0x4140c1c66635de2e6321e5914027b59c7eb7c47b0aba0ee634af2f8c180818df. 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/DEW741123020.
Musik Im Bachhaus - Johann Christoph Bach - Variationen
Orgellandschaft Thüringen, Die Schuke-Orgel In Der Kirche Divi Blasii Zu Mühlhausen (Composed By: Bach)
Die Renaissance-Orgel Von Daniel Meyer Auf Schloss Wilhelmsburg Zu Schmalkalden
Orgellandschaft Thueringen - Die Orgel Der Stiftskirche Zu Roemhild
Die Doering-Orgel In Der Kirche Zum Heiligen Kreuz Bettenhausen
Soli Deo Gloria Musik Zu Luther (Texten Aus Der Taufkirche Bachs)
Johann Ludwig Krebs - Complete Works For Organ Vol.10
Johann Ludwig Krebs - Complete Works For Organ Vol. 4
Johann Ludwig Krebs - Complete Works Of Organ Vol. 1
Orgeln in Thüringen (Trost-Orgel in Altenburg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd03e2d67c5385f44601cd4d4cc8d23389e0bbe84373d049e55a2fd79a40642. 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/DEW740713005.
Die Orgeln Von Zacharias Hildebrandt Vol. 1
Die Orgeln von Gottfried Silbermann, Vol. 2
Johann Ludwig Krebs: Complete Works for Organ, Vol. 6
Orgellandschaft Thueringen - Thueringer Orgelpositive