Manfred Jungwirth (4 June 1919 – 23 October 1999) was an Austrian opera singer in the bass vocal range. Career Born in St. Pölten, Jungwirth first worked as a choirboy in the Sankt Pölten Cathedral
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 0xa220336fdf9e73dcc14d9f63d65eccd3db966f476dda891717290d26e6b25bc7. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22b1ef4b-da72-49ac-9d36-c51deebd67fb.json and https://artists.proofprofile.net/proofs/artist/22b1ef4b-da72-49ac-9d36-c51deebd67fb.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Der Schauspieldirektor, K.486: Ouvertüre
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 0x441272a6032c45ec16135da8fc8874fee8875856ae0974458655b4dbeeecd049. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079010091 — a six-check JSON result.
Der Schauspieldirektor, K.486: Da schlägt die Abschiedsstunde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4aa6e863c838ceac3e1e57995a3c252397fd0f707206122ad28bde8c147a5c. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079010092 — a six-check JSON result.
Der Schauspieldirektor, K.486: Bester Jüngling
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60dce1080379639fe87a4f39aa9b8435aebed933a46ecb6247726da02321fcc0. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079010093 — a six-check JSON result.
Der Schauspieldirektor, K.486: Ich bin die erste Sängerin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3daf1a29578196855d3dccd52d87c844338f111fa5ae97ba66a649a32d0daf. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079010094 — a six-check JSON result.
Der Schauspieldirektor, K.486: Jeder Künstler strebt nach Ehre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cac6726e850a99d0593e420b103f4292ad0cdacd74e46c592463c1a9724b8c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF079010095 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d178fd9940290f4b6f337c4c1352346d1accf48f5f0dd8bdef82a4ea983272. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF078010790 — a six-check JSON result.