Motorenfabrik Hatz is a German manufacturer of diesel engines, based in Ruhstorf an der Rott, Lower Bavaria, Germany.Florian Langenscheidt, Bernd Venohr (Hrsg.): Lexikon der deutschen Weltmarktführer.
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 0x393525d4d2ac62fa3b838fe1439a40888a7b0470d762c1883d53343f949e33b0. 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/b940f90b-0202-4e73-9d49-ba5a384f00d3.json and https://artists.proofprofile.net/proofs/artist/b940f90b-0202-4e73-9d49-ba5a384f00d3.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 0x9c0f1274d072dd3374008b11813b764e78eec2559f101ab51201e04652aa60c1. 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/BX0YS2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7622fc4a44b262a0c319ad6e61c223f79d9ede4fd9b47df92e8c6d5760c296c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BX0YS2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ad6f8c81fea13eea7a2f65df34963023bd374ec0178a0ec0f5ab68b31b8825. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZW9M2447351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a4aa1eb822e210189ffa64266362cbf620badf554b1700a46019c16da2c222. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX0YS2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2fe1dcbd7d710da92b200cf89dece14d629a03a5bd48977ff781b6c18b1ca38. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX0YS2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0944906f96d2277850f4c6c69f7fdbab5b653954d6c350415873fff6a6a282b9. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BX0YS2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c2f0be8244296b9b407090620ffeac0af40b9094a25edd8843689b84fbf69e. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/BX0YS2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0b5493c13decc7a1d383902d2939dcd39c5abab46a826ce6cba022c17f52f0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX0YS2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec4bae31c8f2c229f1c99f7236f877e0d83df87ec4a5b93354413099cd778bd. 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/BX0YS2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1b59e5defb33700d3f734a4d5318efc4e728b87c97eef3a52eb91cc42046bb. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/BX0YS2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8506a73e5abbf92cc1aa790ea3111f367a2501a1f9986fd7fbe19e59b5b3ef9. 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/BX0YS2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe771fa5147626998a4acced045b0d3510e416dad51556ededc242d36a31a6891. 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/BX0YS2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f11a68a12ff28bdbed7034c60e1b1419666acdbaa0511365760b47d0dd81ea. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BX0YS2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c09a7f5cb3350df13d8a65bf9b1ad5a37cedfe9e7fe2a703d232a526712f5dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BX0YS2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761ee9529e2537ac4a3c569179bf9d9f0a559d27b8fec7e806d88135ac07d72f. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BX0YS2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64f544ef6d1e9601ea6ff364545cb907075ccab31b3dcdf8d74fd930f721d6d. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/BX0YS2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fdd7c2a838beddf85ad1c22287a9fcc9e8aad97331fa862b30bb26a38193064. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/BX0YS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e33996b7002f12caf7ffc2f1ac9d809fc54b2f1526d45d51263d060c7613261. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZW9L2273713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4e384d3084af8cdc13bcc79512ee6508ab7273bb137d94b4443d14890b4e07. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/BX0YS2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89546a726a487829730b328a51911aa9d670b73d8bab5dc94f0aade211802056. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX0YS2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1afd5c83d4b21ed1b8663e21c57cf9fa1a4aceea8ae823a4048b71fc5585193c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BX0YS2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8506a73e5abbf92cc1aa790ea3111f367a2501a1f9986fd7fbe19e59b5b3ef9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/BX0YS2400033.