Sturm Café is an electronic body music band from Gävle, Sweden. Music made by Sturm Café provided the soundtrack of the movie . History Sturm Café was founded by the two teenage boys Gustav and Jona
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 0x32ec5ce33e964765bc5944a001ebded54a036e526cfe1016ae97b0fd38215569. 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/ae12d1f7-8e40-43c9-ad9e-a7be2c7cbf35.json and https://artists.proofprofile.net/proofs/artist/ae12d1f7-8e40-43c9-ad9e-a7be2c7cbf35.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 0x18bc7260cf224e1e3ba70f0bae3446489494d186e240c0526899f1a22b2a3df6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SEYFX0500609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b824499ed5919a1cafa53d3cf7711c5a7b44eaf354da5611e15647d992fb7a. 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/SEYOK1126196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6031191caa67cbc656b1adcfa3c96fe4fdb90dd7d2933ced52cadd1865a1ab1e. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:23:42Z), 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/SEYOK1127448.
Koka Kola Freiheit (Thomas P. Heckmann Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b96c2cb9c1fb183286688bd1a444382adf92867f719dcf177a868a353897957. 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/SEYOK1503744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4868157eaaac80ef94ed595c89233dd15095ba563719f4cd2d13f3451bed839. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:26:55Z), 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/SEYOK1503745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446acbcd7fe75f9f95d2916ede60f8facbb71956e3adc5adf49f8dd709e3f6e6. 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/SEYOK1503750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bafefc908e38231ddabb23da7e3e9956fb372f91ff194d87e49674a12984c9c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:14:52Z), 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/SEYOK1503753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e48a584986e83a3bef5c5d2de00636db0450d06c06c2463f4cfa0f5136facc. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/SEYOK2059464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab9b0f6f16201cc749a8bd91164ec3cc673189842a3ecf6966f8334cd426ac1. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/SEYOK2059466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6bdf9870a305ff6f49fd056244a9e54d59c539b3de4562125ce65acacbc0a3. 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/SEYOK2059468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1533efb50bdba7b9e59a833ea8127db0d071b2e77bf4af84a51899692eef9cc6. 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/SEYOK2217340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbf29da2b8b74db742b2e4132729fdb488e9dd548aff5fe7cb453d0357993a1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SEYOK2304002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a01fa613f29ea3509f173bab4b85954ab01684ac11e58abb0f8413f3ff7c89c. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/SEYOK2312127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfff9af9f2a3d521c1606d59c777409c51b69943eb9e2d28d671f7379197a5ef. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:50:11Z), 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/SEYOK2315991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f1c59fe2fc6938464dd0f58e4a7298be5b95f81092e9a0b27f64b6f43be64d. 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/SEYOK2315994.
Sturm Diesel Hands: Svensk-Amerikansk Vänskap
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb132941b0c128e96729fb6645ba67f8b54b500f1a2a5036f0c62fe549d947930. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:34Z), 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/SEYOK2429951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2281234fa418b50a4545481128f950280970c92b7776b566f7caf0097046d493. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEYOK2429950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6d5466da05eccfa487a05d17e03ab873bede315b8ccbf37fd8f4577324417e. 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/SEYFX0900108.