Haujobb is a German electronic musical project whose output has ranged drastically within the electronic music spectrum, from electro-industrial to ambient and techno. They have become a staple crosso
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 0x98ddefe5f44ee5e6f8f0187d98c547c0be3029acbef92466200ec7d7ac9369ec. 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/eff4f451-3813-428c-9950-afcea0c91f4a.json and https://artists.proofprofile.net/proofs/artist/eff4f451-3813-428c-9950-afcea0c91f4a.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 0xe7d69671f6523d6fe157c72c3a41db79473cc74f69455e499c229f3ad5331497. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US57M0503202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5862e05827e4c27a39c4fce35a49816bd89f48d00f3f8936851b79e77da04303. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/US57M0503209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e16967ef65e7512f5810c3a9a3891144153ff654a938b8db3564c9bb7b6159. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US57M0524501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb39c6959950e9770f39501fadb39f5363e0e2f9151053e924229b89dc04e4. 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/US57M0525501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dffe371c619d4bb0e6ec8bf2812a4913224252f159456c79203ec918e7be33a. 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/US57M0525503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77445ba9ebf0e975bb41daf3567406da340ba52439917d955f3499c3c1655996. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:59:43Z), 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/US57M0525511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c5c0428d17d381dd36b5286d5d78608b855a8180265f330587dc697cf6dde3. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:24:36Z), 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/DEP510915204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe3ecf182b2b6e9fa404d01a797617635796b2159a2cbabb3bc72529af88f48. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEOT31100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fb9bbd77bc33268d62d2e94970e0e5f30383f9372bb9d8dfc397e4e18aad53. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEOT31100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe05bda67991be4e4c7458e90508e6840373670e6a451616bc8c8f303c9ae83f8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEOT31100107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d24b646dd7593d08b9242848ea14d5933c36a87ca241e4a700ca2cd4f34502. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEOT31500145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d512ba3592cc3b2024435bb6b6a741f00458e5d977dc19a487700f078fa21d6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:31:50Z), 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/DEOT31500149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3390cc8c84728e440ea37b7ee07670979a5956d040e102e1ee6d49492f1e9881. 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/US57M0640913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa293c91d3905d2411d321a1c26f2c5efa3cf1deb10ba62b33ad5456eaf2046d6. 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/BEC261380306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19478b292adc0ad07ec48562f68e571ee4c89e21e7c518a395bf0094df1bf8fb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BEC261310306.
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 0x76a6964a9dedc6295f9700982d313a4ae855cb3c20eec759605e28da9ec75a4d. 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/USA370581707.