Markus Butter (born 1973)Den Intellekt fordern, Artikel in Kleine Zeitung, 19 February 2011, retrieved on 4 March 2019 is an Austrian operatic baritone.Markus Butter on Opera Musica Career Born in
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 0xefb06fdff145b3f1fd90d39e10613d3fbcadd1f1ffd8fb1bbfa232c2068a5544. Chain 2 (Bitcoin): anchored in block 953950 (2026-06-16T13:35:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/249e633a-56de-4e87-be4f-1e44481d9dce.json and https://artists.proofprofile.net/proofs/artist/249e633a-56de-4e87-be4f-1e44481d9dce.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stabat Mater, Op. 58: I. Quartetto e Coro
Dvorák: Stabat Mater (Original Version for Soloists, Choir & Piano)
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 0x3c5eeac71eedc449390ef9681df85e7287822f39f81e9695f5b6a8a87f0c9a28. 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/FRZ130706051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b012cad7655acc7e61f212f63f2397517fe4219f63c7f0494ebd63961b045c. 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/FRZ130706052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62edf67c2bc5371f31f300d4881e8ad2f3a2f64667af4783ad5ab35c614352b8. 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/FRZ130706053.
Stabat Mater, Op. 58: VII. Quartetto e Coro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fe6c3722f21be50fef83bb0acd8f6851361bfc39ff2002eaad7e2dd7245546. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRZ130706057.