Rotraud Hansmann (born 1 March 1940) is an Austrian soprano in opera and concert. She was a singer in the recordings by Nikolaus Harnoncourt which began historically informed performances, such as Mo
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 0xbd2219f4b747020a7a824583d1e1a74a4f773359767a2f0fbbf032fb5502b5f2. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b44245de-b59b-4568-8980-e81309b9a424.json and https://artists.proofprofile.net/proofs/artist/b44245de-b59b-4568-8980-e81309b9a424.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Parsifal, WWV 111 / Act 1: "Seht dort, die wilde Reiterin"
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 0x125484342c73ce29cddd131f70a1eb078d106439a34d04d65e69ce39335f6e5e. 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/GBF071741603.
Parsifal, WWV 111 / Act 1: "He, du da! Was liegst du dort wie ein wildes Tier?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0ef67b60ee67760bcb878956da57a8f4f36fba1a1bcf07d60eac5b03f2c9c6. 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/GBF071741605.
Parsifal / Act 1: "Seht dort, die wilde Reiterin"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb095dd22b4d18d3dba9ed6b1eec282dd8237be70f1ab601047600b74b5ee09. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBF077241303.
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
Parsifal / Act 1: "He, du da! Was liegst du dort wie ein wildes Tier?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e95689d04cfa6a9b35fa54ebbf758d3cb2b1315b25379517269a4188f9d6a5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBF077241305.
Parsifal / Act 1: Vor allem nun: die Speer kehr' uns zurück
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c6972a8fae5877b3d62a64833492ffc6af08aab4657b1ccd5926312c91c100. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBF077241308.
Parsifal, WWV 111 / Act 1: "Vor allem nun: die Speer kehr' uns zurück"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21e383539d226e10aeefc1828a66fe85feb8d8c6e488a3d218c01eb25f1ae32. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBF071741608.
Parsifal, WWV 111 / Act 1: "Weh! - Hoho! - Auf! - Wer ist der Frevler?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66a90c3ef5e1f152030d3beb75af2f0a5e3bff98745e102352b5d2f7a685917. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBF071741609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd70619832a1fd02e2b17bfb1a9730cfd0e5cb291408ed7974e0712c537674cd. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ATP138032501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1201a0712ae4c6fae39a43362dba41ba250bfd177b62fc7ab2e75f964b7a22bd. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/ATP138032502.