Oliver Lars Fred Kalkofe (born 12 September 1965) is a German actor, comedian, satirist, writer and audiobook narrator. Life and career Kalkofe was born in Hanover and grew up in Engelbostel and Pe
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 0x1f0affe316e62d721eceb2149d62af5841cd42fcb883c53920113231b2a4247d. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06040a87-ee65-4642-8c59-90e8f26aa137.json and https://artists.proofprofile.net/proofs/artist/06040a87-ee65-4642-8c59-90e8f26aa137.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 0x564c63b8b743f3d215f309189a20a0be54409efb8c3b3ca021f6f15681b8948f. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/DEXO52431410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a141b9e7fd97a2883db333f0ab45ed75942fdc73d267c19c883981f389d5819. 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/DEXO52431411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf693d3473267e03eec69e9c7ae9e139cab2df109e87846d49d0d532384b2153. 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/DEXO52431412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d511acf9d03dc39d260d6e69289331dd67c2af815363264fda1282f18967c3. 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/DEXO52431413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ec0589b2df3937569bff24821a0368e2b949fed10cfdc19b0528bbc2cf6706. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEXO52431414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4cb1bc971a0dadc46f577b51d7c9b4b56e442c67b81ec634739025e18d8a23. 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/DEXO52431415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba55a834f53642c44d982733a5909a32d7da322f7fc2a1907ed0b756c2d14859. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/DEXO52431416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663c87f82248ca0ec8da01483abd6af726b6d8cb6fdbd675e5b9fe984e8e072e. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEXO52431417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d757c14d8522ed6e36b43af17d789ef5063d5b2b74cfbcf682c665bd692459. 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/DEXO52431418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd55c6d6cb97054e3dbd1840a1a36f5a85b7ff7a36b9c4e3b0ea75480f5e928ce. 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/DEXO52431419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8770ce608ab91c45206f0b59214dea66b56da49a0b47bd13d41bee28f75d5d81. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEXO52431420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c0ece18df4e08557dcee11ed1bd730f2c36fbbcee63c999f15bf549e7a7619. 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/DEXO52431421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19de99e66186c972b7a07c891f6600f0639dea906d223b1bf9415ec27db92e6b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEXO52431422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d317f4bb2d015145e1625e443d2654fd396ffe7aed2ec5c4b374d32d04f9f29. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEXO52431423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9880285f041d127e529a91b53b87ba1cb5cfa25b3b50a04afd0692c7e7549a1. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DEXO52431424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbece75fa0555a8a77534a1adcf57f790fb7eec3dd71ba44cc13c50a741d59b15. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEXO52431425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ed675134d909e13c8ab3c020b7e082d21eb3243d4a186227a0dc817242fa5c. 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/DEXO52431426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65376b3834b9eb7a82d284ad8c641593901403f31ff53784434aadc6b15ab4b8. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEXO52431427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8b7c5a6e61cb7bb8d280d37fa2c7dc459b8d022788465e055f28068c3d2380. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/DEXO52431428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62187450af4f77f085b073725dac5095e70947fafbbffe3e8acce61a50bb0f45. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DEXO52431429.