Franz Lehrndorfer (10 August 1928 – 10 January 2013) was a German organist, composer, and pedagogue. Biography thumb|Main Organ from Georg Jann (1994) at the Frauenkirche in Munich Franz Lehrndorfe
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 0x2aeb5451d5624bd0f61f33f739fea2a69d1a192791990788404d86c4ec2b674b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a73c529-bc32-4cb0-899b-6def83337215.json and https://artists.proofprofile.net/proofs/artist/6a73c529-bc32-4cb0-899b-6def83337215.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Theme & Variations, Vol. 1: Improvisations on Children's Songs
The three organs of the Ottobeuren Abbey
Haas: Suite A-Dur, Op. 25 / Höller: Ciacona, Op. 54 / Hindemith: Sonate No. 2
Haydn: Organ Concerto No. 1, Hob. XVII:1 & Two Concerti for Lira No. 2, Hob. VIIh:2 & No. 4, Hob. VIIh:4
Celestial Christmas 5: Franz Lehrndorfer Plays Seasonal Music on the New Organ in the Dome at Munich
Theme & Variations, Vol. 2: Franz Lehrndorfer Improvises on the New Organ in the Dome at Munich
Romantic Organ Music of the 19th Century
Die Barockorgel in der Basilika Benediktbeuern
Concerto grosso in D Major, Op. 6, No. 4: I. Adagio - Allegro
Südwestdeutsches Kammerorchester Pforzheim
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 0x8680c144367c5073ec6218ae684fc821d067823adc5f197e7fc00dcd205a05cf. 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/DEA581300044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8680c144367c5073ec6218ae684fc821d067823adc5f197e7fc00dcd205a05cf. 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/DEA581300044.
Concerto No. 2 D Major: I. Allegro spirituoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe139fbcfe36c48176876f9610fbf2c249cb372b6223e702e4951c000ac2edbd4. 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/DEA740312105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15de6a5e32734771b8d27a6374e122fe582a170e9be56733886d700178c78e2. 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/DEA740312107.