Otto Stransky (15 May 1889 – 23 November 1932) was an Austrian composer. He worked in the German film industry for a number of years. He also composed a number of operettas. He died in 1932 following
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 0xd001416f20f8fa6b56b4a8f2f29392b0d37f3c7d356e10b359e90cf76842fa84. 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/78528e1a-728d-4e1e-8767-8181b8b12f35.json and https://artists.proofprofile.net/proofs/artist/78528e1a-728d-4e1e-8767-8181b8b12f35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Richard Tauber Collection, Vol. 17: Popular German Songs, Vol.1 (Recordings 1927 - 1932)
Chronik deutscher Filmmusik - History of German Film Music, Vol. 2: Melodie der Liebe (1931-1933)
The Roaring Twenties (Die wilden Zwanziger), Vol. 4: Das Mädel hat Sex Appeal
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 0x58a3ccd46a80e001119264333cbbedf618311a78c14f9e107aa1ad9ede13be92. 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/CA5KR1936182.
Singers of the Century: Gitta Alpár in Operetta, Film & Opera
The Richard Tauber Collection: German & International Popular Songs, Vol 2 (Recordings 1923 - 1938)
The Golden Era of the German Dance Orchestra: Berliner Nachte, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8153be98eac6a090d636033140eb135493c8b6cedd7d5f0bd7fa3bdf56fb1b8. 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/PLA391322002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7eeeae26ce33831ce14985c100dc06f0aeb14767767931e9c5d160251f0317. 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/PLA391322004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf759b047bbea8b70ca6c5ad090f1cfcee0dd4fef0744a2d5968822775bcffcd4. 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/PLA391322008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf6019b00655273a18ab6d3643e4bd1ff14e2442d4a10a29959694b95c5500c. 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/PLA391322011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5556fcdf43e9383280784dd0f2291966037a96779a05229baad3c89faabda2c9. 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/PLA391322012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761192205bab15f29f3945a81bc0890fdd4797ed1b5e17767635fa4095545da0. 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/PLA391322013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc2c13aaface9d120f9fbb7cf01a109433107be4cbe27f6edbdb5a766de0004. 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/PLA391322014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353e7ed2fe327475b5e8966df99ba8922447a9fea95ea5e8ef9f8f2950ff7190. 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/PLA391322016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc23807d9880135d6dd0882ca6077f0eb39c671f42953c1af1769941940317b. 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/PLA391322021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb63b9d92d59854099c5be8fa1bdb421d759a9c26b215ce433078e1b299007fa. 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/PLA391322025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57fa7d7bb28c995ea1d884e7abc73cc590deb8993d22568941b5bc34e8578bb. 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/PLA391322026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dda0aacdcf42ca6267378bb7553d9a0d610f976de1f147ce4baf4e84c1094f. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/PLA391322031.
Schellack Schätze: Treasures on 78 RPM from Berlin, Europe & the World, Vol. 35
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca2174eccf092123a01a857a5ed804af2f288632e52f13926a8510b38c65959. 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/DEL111901199.