Engst is a surname. Notable people with the surname include: Adam C. Engst (born 1967), American technology writer and publisher Erwin Engst (1918–2003), American advisor to the People's Republic of
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 0x24a4a9c5962f95262a35a071d9d9a839f8d34068a0661f4749fc25f8662b93e4. 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/4ea507cf-957f-419c-ad77-9431ef52e259.json and https://artists.proofprofile.net/proofs/artist/4ea507cf-957f-419c-ad77-9431ef52e259.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 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 0x6c4b2192c183c41798d4fc6458fbd5582a97f66be241b355a8c4ee51d8f640ae. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEYO62000038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4650b88007864bbe24a20dae47a43c1f4b29d0c6d021817cea882ad4a291f823. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/DEYO62000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6001d8fa63cce385417cdf0c735312727b91f1982542d7046c8b296cba3e5e3d. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEYO62000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa11376c5ce7214e78dd4d122f7a4f6a180738485492ee356cb027beafdc55bb. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEYO62000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e5317559204bb5a5209c6756e20679362ff511b72816f8b77b00757f25988e. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DEYO62000043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132b96dfee3467b0ae1b329048d82795dc336087f0301d4f8e7a7cb256c98ab6. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/DEYO62000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ec7d95a2eadf5d647d581cfc0f6b1c6062a3630f85871b053639c6823d2d4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEYO62000046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7555db40cd6b2b9f202afedf2a44cca6a41b3b8f33bba37bb1bbc4da62326575. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/DEYO62000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bb9438f8da0983543a251db998c27d00c5f89d91ced44c57c8cfc6fe0976c0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEYO62100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365db6b4da7595a4a576b9e45b53a6b0616e41c46cfa00734e86b8986645b64d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DEYO62100177.
Hast Du vielleicht (Sondaschule Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed74ae873ae0910758d2d543271847f41a591118d3b27c6f8e12da563bacd67b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DEYO62200234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4644b1248fc3cfa3d837c2e00312a0dd6ddaea3c06021dd61295536fcad64e. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:59Z), 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/DEYO62300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7eec705b5b66e012e10aa7cbbb5cdd9f6703509ca7024c60f4789d82f13a80. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/DEYO62300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979b020b8ebfd34b9061182e590cbf3f7af23768b8837bc5dde3406df7a66672. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/DEYO62300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db50df7f87e990d7e9fcd9cfd80ca147ce0af20c4c8d080307102a5b6abdbf0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEYO62300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca69a72afe34d1df3806eef3009a41afe5ae2e2c4191273be41667faf9caddf7. 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/DEZC62449112.