Alexander Bojcan (born 20 November 1974), known professionally as Kurt Krömer, is a German comedian and actor. Life Krömer was born in West Berlin. He works as actor, comedian and podcast host in G
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 0xd859d67c5e44fb3e0d3cb3f6113ebbca4bf47ded4233bf9f8bd2ce3c6776eead. 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/513da309-7a5f-458d-ac9e-f263b37c8427.json and https://artists.proofprofile.net/proofs/artist/513da309-7a5f-458d-ac9e-f263b37c8427.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 0x89ce528f30ad34a6a6b743ad919399ad3302a17abea6abe164a843900a87b3cd. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEZ650400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ec63c1d9791606d4c76815b89a36a5e4a428013e0fffc1bc94b54218546b56. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEZ650400012.
Als Ich Mich Von Meinem Fernseher Getrennt Habe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed38e3b288af78451a05d70972cc53e8bb6b9b6c0b170f35544c60b9f59fa52. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/DEZ650400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d6dcc57c9debd66793fd1c1081eb8e91fe820e5000c9bda7fb8ef51a6eed80. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEZ650400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a738f8fde10711719052918baca395af6446b4f5b31687a423e2e14008bcd9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEZ650400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6faf59c14f653fb7fcafc0b404c26c67105173e12dcea3c8929119bae154fb9. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEZ650400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc08c6114bf35855f98bf09349518ba4a290259e2415640f30d3a8f8c29609a3. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/DEZ650400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e29704ef17c409a729a01d9f29922f5d49ef050c30365b2f560d545f6239301. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZ650400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5004a7e4c600f95561ae8864bb06ff2a23ace799e090aa62ca34829235a2672. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/DEZ650400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856611ca1b7d996ce7dc84a43e487f0b656046ec4d5ea95ed70f6598dfdd9ec. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/DEZ650400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9c9246b5cc96d3b3d3d92cc3248ee56ccae2ed60fa818aec8e85c4ef9c12b1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEZ650400021.
Wir Berliner Sind Ja Quasi Die Erfinder Der Freundlichkeit (Inkl. Bonustrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27475a6a951d6cbe371f29b03c717dfd450f3b83e9660c4af781a2cc76fcade5. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/DEZ650400022.
Du darfst nicht alles glauben, was du denkst [Meine Depression (Ungekürzte Lesung)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcce514b404ee1b5d1414eeeaf14bda7ebb6e6ec2850f3d92e18c2f5f6adf068. 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/DEUM70904880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1596c0b659574dd1a851651c9831c33023a61de0bad8532f0dd8e36a6287c7. 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/DETX41900404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e46ab863efb103d89bbd2f0d8cc931aedeed230b06c1524a296a187a6fb16b0. 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/DEUM70904884.