Mojca Erdmann (born 29 December 1975) is a German soprano who is particularly associated with the Mozart operas. She created the role of Ariadne in Rihm's Dionysos at the Salzburg Festival. Career Bo
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 0x66ac64939b51f96fd3bd99b6772d061fba203277a64b35806c6b201fa4a04598. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7372b143-ebb4-4ee4-98bd-9e87efbf2dda.json and https://artists.proofprofile.net/proofs/artist/7372b143-ebb4-4ee4-98bd-9e87efbf2dda.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zaide, K.344 / Act 1: Ruhe sanft, mein holdes Leben
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 0x9ca9b10eb4f0e0882167c957d739b7e90db40812fca08d33176d3897346d501b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEN961001210.
Mendelssohn: Symphony No. 5 in D Major, Op. 107, MWV N 15 "Reformation"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e49277be263fe9f56ba7998df57dccdd652c3caebca78fa209935c61fec238. 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/USBC11000269.
Du denkst mit einem Fädchen mich zu fangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26b2a089b8cdc57e91bd29d31f40096f07e149f552f697299dbea29c554bb3b. 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/USBC11000278.
Wie lange schon war immer mein Verlangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd486db81f83c24ad1580d38182d4549f13f735c23b7e25323131065f3eabd58c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USBC11000279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bc7f2f61538cc48fb88855746b964f82551f24ff2d5c2bf9b86663fc9132c7. 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/USBC11000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e8a324b18eb6359ddb97fe1f44a4bcb0796066ce2357cf00f589a2ea4ce03. 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/USBC11000314.
Mein Liebster singt am Haus im Mondenscheine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690a50e666f561ba6aab0c0c71212c342d71e6613a5a0ea63a78759dbba4cc11. 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/USBC11000288.