Anneke Uittenbosch (11 March 1930 – 25 September 2023) was a Dutch harpsichordist. Biography Born in Haarlem on 11 March 1930, Uittenbosch first took piano lessons from her father. She took Gustav Le
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 0xce70f26cef5bde226e4e56f8311f4ed7a84620e092eb4f6103e7e285d4fe0dc7. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a83a1e3b-746a-4078-ab95-2ab9453cc2a9.json and https://artists.proofprofile.net/proofs/artist/a83a1e3b-746a-4078-ab95-2ab9453cc2a9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carl Philipp Emanuel Bach, Six Prussian Sonatas WQ 48
Bach, JS: Concerto for Two Harpsichords in C Major, BWV 1061: I. —
Bach: Concertos for 2, 3 & 4 Harpsichords, BWV 1060 - 1065
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 0x4fa53223fe1d6dc9db924fee5f05cba308a4a579617c253ad8c48a3569199dcc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA806702201.
Bach, JS: Concerto for Two Harpsichords in C Major, BWV 1061: II. Adagio ovvero largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf8fed09c0a4b6a0c5c81b56ff8f49eb43be8fff42eca2fb8a40018a5706648. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA806702202.
Bach, JS: Concerto for Four Harpsichords in A Minor, BWV 1065: I. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799cc78433314a3d774595458786a024961114b3dd0575610a490f8938a5c451. 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/DEA806201101.
Bach, JS: Concerto for Three Harpsichords in D Minor, BWV 1063: I. —
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d29359b3faeec4359d63bcd32c05a9e092e54862ec06d1f2702560202b818f7. 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/DEA806300501.
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
Bach, JS: Concerto for Three Harpsichords in D Minor, BWV 1063: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db3a56f277cec1097bf283fd7d7432a7e94b5c4a631659f28d024ecab73354a. 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/DEA806300503.
Bach, JS: Concerto for Four Harpsichords in A Minor, BWV 1065: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af62a513a22e3e03f2d52715a6cf4f686c554e365f7c5aab000b944599dc2d8. 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/DEA806201102.
Bach, JS: Concerto for Four Harpsichords in A Minor, BWV 1065: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1329dac6a3e0a89b461e0e271c1d0f7437343252babf5c92c8796dc9e58b9a86. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEA806201103.