Krüger, Krueger, Kreuger and Kruger (without the umlaut ü) are German surnames originating from Krüger, meaning tavern-keeper in Low German and potter in Central German and Upper German, both associat
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 0xb4e0c6acfda2c8eb857df4aeb43bd90999a4a6a372540e57514c85735fb40c5b. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c49236c9-9f82-4216-93e1-5cc39764d7bb.json and https://artists.proofprofile.net/proofs/artist/c49236c9-9f82-4216-93e1-5cc39764d7bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
For Death, Glory and the End of the World
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 0xde4d91e924b66a5a30bb3e03666c3d15159793ccc4883c2507a7961f7a10646e. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR1PP0901460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605a667d8c6ace20b87e9c80509e9db8094442be4e11743301f90408ff740627. 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/FR1PP0901520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd435cec2f5f0f4c3ef009f0964185aad9fafac0a6427c556e5bb0d90feb9145c. 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/DEKE51300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc184aa8b84dcf01ae14b380d9819e02d73e9996a3dca51c66d349e648ea5988e. 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/QZ9452300977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ea5fadf6ac5f392d3573ecbf26c0101b7bab0a3b6f3aad317b3c49e44a7243. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZ9452300976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f74426b6bdacacaa8bffd65506fbfa4d750ae7cde5b7efe087d19a2806ddc2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ9452300975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a86f697e6bc4cb5fe4c4510355e58619b1f33ab9b8defa0f3044078ae2b7018. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZ9452300974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5da6b0066597abbc2d245edf989642ac940db5f48959e9a7ba563625796df1. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ9452300973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564873f47e0987efee14824e24265e932920cf2f12bc1e90c49b1b7829b15c58. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZ9452300972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x529af16fb95ed1e9c84a5349cbb4e09aead8dbbf7eee647d2b910554252826ab. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZ9452300971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02583f3579388854f9d0b899f0a3af42bbad03defbe8a5b5bd7164e1d3a3815. 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/QZ9452300970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf658a6eed91dd70e03aec2a542521ff506b510ccfbe1dcef7ea8742b1b91a25b. 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/QZ9452300969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb951845c67213e0c52f653fd2a9155723b3f1677abdae6ef0618739569d1132e. 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/QZ9452300968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743c798a3e730c4d428fe616c2c683c6b30a2d1ae116a4e6f218e91bbeb1c5fb. 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/QZ9452300967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e790f5b631e4289c7caa98737011c68372ce05d238229bd500190b69146cab. 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/QZ9452300965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafa5b417d1a3c53a35592142389419e59e2eab1ca97a4c3ea56845858b3b9f0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ9452300964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3404d6d2855945036f663eacbe81806eb61bef5c426b43eb7ea8475e4d00a4d8. 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/QZ9452300963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa380f9765e0d0a9176b26c64013d3f77da2a8fec597babeb76696e716a1051c1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ9452300962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6a0594efd81a0f7372c8ddc38b4fa980ca892e2c94373db07371b033638d35. 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/QZ9452300961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169cc9957b1d48510beb0159d3941aca80405dc7bf5cc0e4b5e0360537c2c43b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZ9452300960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79392e5d5d600d06f22730a48009cb0e81160b6a26f1419c2ac6ba1eb202414. 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/QZDA72274027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd838de49b24c8129c28f46d7c0ecd70bde976b388f95e01a293bb3aaf07fafe. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZDA72274032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2adc1d7bd282cf196f7722b7bc8a8d42f4775323f35302ac911b3d53f5f471ba. 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/QZES82199682.