Helmut Gustav Friedrich Qualtinger (; 8 October 1928 – 29 September 1986; also spelled Helmuth Qualtinger) was an Austrian actor, cabaret performer, writer and reciter. Biography Qualtinger was born
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 0x78f1bfc204cdb80db284c623623ed2f631c63b7ce398d08bf023d1d486e2777b. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad56c566-a80f-4d43-853a-efd0292e935c.json and https://artists.proofprofile.net/proofs/artist/ad56c566-a80f-4d43-853a-efd0292e935c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Österreichisches Lesebuch - Helmut Qualtinger liest Anton Kuh
Mit Fremden Federn - Helmut Qualtinger liest Robert Neumann
Gerhard Aberle war in Stehkneipen - Gespräche an der Theke mit H
Ka Stadt zum leben - ka Stadt zum sterben
Moritaten oder das Morden höret nimmer auf
Das Beste vom Besten des Wiener Kabaretts (Vol.1)
Der Qualtinger - Ein kabarettistisches Porträt
Wie man verschieden Geräusche erzeugen kann
Die Abenteuer des braven Soldaten Schwejk
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 0xcea0779232f71c626dd9910c2e4e31df11f350354e6327dbb66cb8d081599154. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP139006501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d46ddcfdac77d29b28567259c2d3f0888a9702009e986a8c81544908b57ac79. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP139006502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdddd9b9d2051815f4473729837d06337ad53e3892d3f8cf8bd2d0c01ba89f3a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP139006508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ddfac82b9b55281882ce580ad5ea7ebd5a07ad4af49a0d0299b17fe1c5ecbf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP139006509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb658b7662ade897cb116546a8bb18b972f609865594b6b7fcad812dcc3988d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/ATP139631213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbcd834310c7a8f56a3862d5280068f7607465c23783cc9d84401b899217a85e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:51Z), 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/ATP138922401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89444db8a3032553c04b1d8c6f9a22bcd1d98cc92c03d76835b48878899c139d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:43:43Z), 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/ATF069300250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda90e4f3fa341970935328040e950bc462d72fa38b2af334c722cf21a64c075e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATF069300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f0ceee3bd68223245818f71fb53b690d283f4caa496a11830265d80a90725bd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ATF069300320.
28. Juni 1914 - Die letzten Tage der Menschheit - Vorspiel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f26f7d965adc250cbd0b2f7e787a7c6e3493dbdee743f7198e7962e42ed8510. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATF069300470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b58f75c5c8058f1994daa18aeff8f08e0d80f6dbc0791959116c96d54493d02. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ATE064100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde32d50451c46a9d40e5691d6bb7abe493785585a9d1c48277c81ca6f8f557e1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATF069300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da72ed968df1b8e854f03796e1544218dc49371e5c950b14d416501128f2027. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATF069300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a49f8f71a48af399d98d9cc0a53624b6bc658c63ce4646bd6d88c949c5fb36c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATE066100010.