Vera Schlosser (25 July 1929 – 22 November 2018) was a German operatic soprano. She made her career in Germany and Switzerland, with guest appearances at opera houses in Italy, including La Scala, Mil
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 0xbef9ba81436ea8611ecadd373a7dc2e362636590fce15a034f135581d2420d3b. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cbeba21-7ead-40b8-888e-7bb3d4a06baa.json and https://artists.proofprofile.net/proofs/artist/9cbeba21-7ead-40b8-888e-7bb3d4a06baa.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Die Walküre, WWV 86B / Act III: Hojotoho! Heiaha! - Remastered 2022
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 0x9ff8abdb5137ca9596c91bb4e458e95b74ed0ad965a20f1d9345a1d1c5267e16. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBBBC2200542 — a six-check JSON result.
Die Walküre, WWV 86B / Act III: Schützt mich und helft in höchster Not - Remastered 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1f2af5f82a582cea9bee06dbefe1cde61c065ec4788f50a585f65d1f229b86. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBBBC2200543 — a six-check JSON result.
Die Walküre, WWV 86B / Act III: Nicht sehre dich Sorge um mich - Remastered 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e249543ce7266f97f577092d3996cf43206b0d21e2c9e43f0bd6715f795453. 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/GBBBC2200544 — a six-check JSON result.
Die Walküre, WWV 86B / Act III: Steh, Brünnhild' - Remastered 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00fa48b2ca2476890db4f7748099bf4fd2c6af2354f1a1323f82b650d6abb3b. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBBBC2200545 — a six-check JSON result.
Die Walküre, WWV 86B / Act III: Wo ist Brünnhild', wo die Verbrecherin? - Remastered 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd866ad35d82255455afa617c730cadd5ae42b33781ae36bbeac6923b46a14029. 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/GBBBC2200546 — a six-check JSON result.
Die Walküre, WWV 86B / Act III: Wehe! Weh! Schwester, ach Schwester! - Remastered 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d950005e099e00a373ed38879ec32afd462273f4f68454c0e524d920705f2de. 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/GBBBC2200548 — a six-check JSON result.
Die Walküre, WWV 86B / Act 3: "Hojotoho! Hojotoho!"...Ride Of The Valkyries
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9945b7540923c7a46a621a73daffbb7293871ceeec753bdf7c710be3e88bdf6. 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/GBF076510261 — a six-check JSON result.
Die Walküre, WWV 86B / Act III: Hojotoho! Heiaha! (Ride of the Valkyries) - Edit / Remastered 2022
The Golden Ring: Great Scenes from Wagner's Der Ring des Nibelungen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804c74f9ff149edf480c7db575f3a8cf23724f59445bc87064c9d40557920e20. 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/GBBBC2200775 — a six-check JSON result.
Die Walküre, WWV 86B / Act 3: "Hojotoho! Heiaha!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e58568ca7a2b702a88f166083370fa6185e307af728cbb9e4fdac7444e64e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBF071240130 — a six-check JSON result.
Die Walküre, WWV 86B / Act 3: "Schützt mich und helft in höchster Not"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8975451fbabaac7d3b8c593f3d8a13bafc7cfe4a5040a1f304e050c7f8f955d3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBF071240131 — a six-check JSON result.
Die Walküre, WWV 86B / Act 3: "Nicht sehre dich Sorge um mich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a20e9bf4610a91e9865d4671d9546019b77d1a7b95aadc61ab6db99204f8324. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBF071240132 — a six-check JSON result.
Die Walküre, WWV 86B / Act 3: "Steh, Brünnhild'"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4fad3a3789ba84370b0219e87d8d089ec2139c3ea631cf7eb4e6532c7f9bb6. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/GBF071240133 — a six-check JSON result.