Vincente de Teba Költerhoff (born 18 October 1978), known professionally as Frauenarzt (German for "gynaecologist", literally "The Women's Doctor"), is a German rapper from Berlin, also known as "DJ K
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 0x1916d1b17ff3b15fd523ef019009bd6e38a16065c0633f835269fb13f3851221. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fe7da59-f2cd-47af-8873-fb969c240f69.json and https://artists.proofprofile.net/proofs/artist/0fe7da59-f2cd-47af-8873-fb969c240f69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xc2f6fa126d2475e440994911163acd03899f3f62a6050e8548fe8c88568c7c01. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUV91600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf691967fefcf32b79f90f0d32b2c7a9af9a2d45d5bd7bc0fca721045069ddd89. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUV91600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44469c1b44d37fa19bc5ad6e44768283fb57b31ca9ad092041fc413dd94cabf1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUV91600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb252e040a24bc8549ed7d138dc549e837d4433f04cfaa3de527f339e81b45a3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUV91600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef03c9af55edbcd7e1e4512a06ea5b5f60dc53537885b698de35fa7e9607629. 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/DEUV91600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb407b7b1a52b0fcb73393265104ea1e5c2b90940265288766dfb0ea7bcb11398. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUV91600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe22f4800f67ae5c6be23b99f402e38c9733f6ffbdee098907bbcdedbd4a07a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEUV91600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a13d5407e10f6aaf3c01b2de2e55238f179e753a423587d230d8da5313dfe91. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEUV91600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea8cbad6900a7c0e27e3db3ab006ec1c991cc1337b1a513d56b462c32a94423. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEUV91600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2bf929a0b78fc0531bea25e67e872cec9c02e21267e1ecbf149af643737b9e. 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/DEUV91600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8802e470f019be081cc4b9deeb29c4c405612f72c1b71b599ed19c01aa89a48a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUV91600011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011e31e4806c8fd949450c12cbdd339f24da300735034ab0e0421516e70be340. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUV91600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9921933cae0294074fb098e0ef01edf47d7e230722375f910a3dad510a005697. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUV91600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53997f65eda010c551bb2965c11075e9034c75b94ffa15ac902d3615adf0bae6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUV91600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd922582aa742b2a605df8ef735eabf330e0ba64e2b7c98f109358a83469b1def. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUV91600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a70a60b08771a9c08cdd4ba84583dc5a0d16094a71cdec4441672ee5947a615. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUV91600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75a8f8e68a273df0f7477044e2f5cae67a8b1f61269f0e3d8e6922802ef7e9fc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEUV91600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9b951d3c57e537fb7034fb814fa9022aa2cc6570b7758ee904209957a89c57. 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/DEUV91600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d3dd02bbad5cb84e3ae39a670cf110e9833a8559fd4e432ec26a39c3282260. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEUV91600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123c865181c7df558b6beaa35e7341cba058e3b2d4ac77e1c78143ef707a89f7. 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/DEUV91600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55360f69b1c47d67d7cf780fc5c19c58a6d6dec9ba4655ddbe9dc111fc20722b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUV91600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb43e12436f3153a3c3efad93ea40fd89397e70c3164206853b8638b8a71564a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:26:18Z), 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/DEUV91600014.
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 0xbe8a7e9eef0f302b9ad4d4879da1edac6cd546b5be5634ca304f659a2ee625c8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:49Z), 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/DEUV91600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80557f59703cd2c44bcefcf131a98030ea4bbc5e5b62ac1ebef1bf09a4876114. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/DEUV91600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9d06a0eabe50c36350402fa4b10b8e511c26befb1bbb5c38b9a0d310a6af15. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEUV91600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8f2e352fe26ab75816e5b8155f6a152c217e1f0c3e153bc78adaff658e7775. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEUV91600025.