thumb|Ernst Wilhelm Wolf in 1781 Ernst Wilhelm Wolf (baptised 25 February 1735 – 29 or 30 November 1792) was a German composer. Life Wolf was born in Grossen Behringen in Thuringia, today part of the
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 0xb69b8b1f7df1ced7d7f6b7b7d6235541fd6751dbcdbf213871d03ceb8acecb5b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7aabfdd-ea32-4800-b926-758c2dac499a.json and https://artists.proofprofile.net/proofs/artist/b7aabfdd-ea32-4800-b926-758c2dac499a.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Wolf: Passionsoratorium "Jesu, deine Passion will ich jetzt bedenken"
Keyboard Recital: Schornsheim, Christine - Bach, C.P.E. / Bach, W.F. / Bach, J.C. / Kirnberger, J.P. / Muthel, J.G. / Nichelmann, C.
Ernst Wilhelm Wolf: Selected Works for Clavier
Symphony in E-Flat Major: II. Allegretto
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 0xb96deff98e54c940e268ad5337c3c83349336000089e321bc1040b47d5008f59. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI190347802 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc33f4aeaa6489f95ffc27fc30200421523db854973823c433f1701ef2c62550. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/HKI190347811 — a six-check JSON result.
Wolf, E.W.: Symphonies in E Minor / G Major / Destouches, F.S. Von: Symphony in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244d59394a10d98da4b0f68e1bf58e667c57549e14ffc3af839e607ca5a3f11b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DES380001522 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879ec12fcdb988019831c887e5d04b483d64ade6376c280bfd5985b62c09e268. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380001530 — a six-check JSON result.
Rosetti, A.: Piano Concerto in G Major / Wolf, E.W.: Piano Concerto No. 1 / Naumann, J.G.: Piano Concerto in B-Flat Major