thumb|Klaus Hoffmann 2012 Klaus Hoffmann (born 26 March 1951, West Berlin) is a German singer, songwriter and actor. Career Klaus Hoffmann started his career as a singer-songwriter during the late
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 0x7634099ae2288aaedc1d590aed01db764f1238b910774b75445e1eedf1e757c6. 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/5d094015-9251-4778-acb4-803372b7eebb.json and https://artists.proofprofile.net/proofs/artist/5d094015-9251-4778-acb4-803372b7eebb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Da Wird Eine Insel Sein - Insellieder Tour 02/03
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 0x5574d77311f17242b7a6f72efeddc5dec9d4c5f60e6ae0d5f110ce938db743d6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:28:13Z), 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/DEC768300028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fdfc9a19175f44c6526c108fa963caa737146c2aa05e0cee6ca0468f9a8359. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEC768300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3e5d950f41bcfa116bbbcf1b0b33e2a2d643a131f66c19bf67a74061f352ef. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DEC768300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc200f5df5d361393da40082ba7a72adff9363bdcaf03a41d855a979775a7fedd. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEC768300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0607f93471dc57bca36fae568be245e6abc92c03b94a395e57655399882f5e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEC768300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48fe74fef000d04d36c0498fb096bcb0ff47c736ba13550e8cced920f82ae04. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEC768300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f294ee506bf571aa23e603e9ae9cf97777fa5615bbca68a0e37f7867a873a1. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEC768300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be46b1c3d5dd13c20c4af29a1542751f6031d505e3daa7b0eb7ba78f20384a4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEC768300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101ae8fca6a13b88d2153a393e69d1651aac8746dfb778bc97f0d169d63ff157. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEC768300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2a3d8e38e6e86671ed8d07dd7dfced765ad837287975f03c5f9b40a100dae6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEC767600051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c92f9c0daeb8be13d04d25583aca3fe22505dfc14cbb5a87d99c80445ddc7e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DEG129700306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1eb1d05257d48fa1fabb1d19ec1f858fe77b5e1e214c2aba19b2b56c8cd81af. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEQ561999006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6198c1e41ac659e8c7f3fda77786beeac8000251181f1d6afe871899314f9668. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEQ560000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc890e81ba7f0d6997388571242ee36ffe8f107ebfb4e3338548d9c30085c6b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ560000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd3fbeafd270eb709de472b3560ea9db60159e205ccef975f5d6b781dbbedd4. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:33:56Z), 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/DEQ560000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7083ea00e4fd65f752e4ccf4822eb52f61a89f05a5c6036056dc3c180840e45f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ562002001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fa030bc98d43a5bb1036db085a791466a9e006bc121b70490b5e269c9840eb. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEQ562002004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb827e80b0ee8432a88ab451b3a63d6bd72fe64cf3f0bc68d63eb1c08ecd385. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEA340601773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89adcdcc10317b15430ebabb9fdc8283cc5718675f23ec2b72d33055b92795b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEA340601774.
Da wird eine Insel sein - Insellieder Tour 02/03
Der Mann, der fliegen wollte - Eine Lesung mit Musik
Wenn uns nur Liebe bleibt (Hoffmann singt Jacques Brel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076172ea0728424d66c0e6d9a76c81363010070a577d2a2bc88c222a2f8c7c24. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DEQ561000002.
Mit Freunden - Das Geburtstagskonzert zum 60. im Friedrichstadtpalast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8516743b71480e5486e5eebe09981942d717fa9f3b8b4b0ae677fbeafe7be82. 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/DEQ561100089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820b22b46f9aa799184346fa0d0cd9ec385c990793d66bd105058ba8da102a92. 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/DEQ561100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc297614e63735b7b2781e518c442a65959b01df1abe828634f58679a9abe1ee3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ561100045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2282d77b46b62b527f086a576b6f6d2c498f1e9c83b4dde0e746d159745c326e. 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/DEQ561100047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae7eafe2435f88d2ce01f5e1e323150e414e1eac3d8fee42478ae5cf499c2ba. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEQ561100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2999f0425449043fca7d45a1b6587914e341cbaed2b8d16bcc5436c93b3b3c49. 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/DEQ561100053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3aab7788e7392f284b5126adcce3023a6d1a014558e362497ae77083c4c358. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEQ561100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71534d8b0e0aaf5a2efe42a91a4709d8a3026cf97e57280ee9c28005d9cd146d. 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/DEQ561100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19873c07d2180528638b56c790efdc80bb014b9d2a6b6aede1537359ed554235. 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/DEQ561100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa363b6eb7e5f1f1caad91e66b1a0f039082265d1ebf3552e85a3a395634016b9. 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/DEQ561100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c288d029402bd0133cac1f62a0f16ddf277d2c826afc26e42f3023ee3d2899. 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/DEQ561100088.
Als wenn es gar nichts wär (Live-Mitschnitt aus dem Thalia Theater Hamburg)
Als wenn es gar nichts wär (Eine musikalische Lesung aus dem Renaissance-Theater)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f7ea190d0f53b12b51b6cdf9a7fcc5dd81ad5f30d7b107fc443e767c4991be. 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/DEQ561400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e45977846ba41827f759e3b014b67c8a3ca3c850dd0a7222d3a8ca44c52dea. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEQ561400006.
Glaube Liebe Hoffmann (Klaus Hoffmann und Band Live im Friedrichstadt-Palast)
Aquamarin (Klaus Hoffmann und Band Live in der Berliner Philharmonie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8d3fa5d53ba6f4d9205b0ea1fb9d91c87112f4905100302e072c4e4c7138be. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEQ562300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706a7ef75d30f9ee46c2e18ab8fcd0a738cbdc5dd447ad69a0c1fa2b8a23e473. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEQ562300103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0d5b85edbdf794a4dd87989951ec0a65b1b3343907837c8eda422b770c4464. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:33:10Z), 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/DEQ562300104.