Jens Martin Lekman (; born 6 February 1981) is a Swedish musician. His music is guitar-based pop with heavy use of samples and strings, with lyrics that are often witty, romantic, and melancholic. His
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 0x1910689a81d5c49f072cf2161bb0b0b3b08f1236246028b7c8f3a6a5cf77e1af. 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/7109078f-b152-4e0f-8e71-bc1dbc1655a5.json and https://artists.proofprofile.net/proofs/artist/7109078f-b152-4e0f-8e71-bc1dbc1655a5.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 0xa7e645fac3a48dfc472265398b36001cf3dd132e971a5e975231f409fab29587. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US38W2138901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce41f7bc2f5ccc1e3d4411efcebd1462f686be27d61dc64fb1ca5983a724970. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38W2138902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70168ae4dc0820843b5cdb21c05f7a0c649f86affbafebd1bb6d32769721f7da. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38W2138903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f187e2260d40d8f19ebf69db94a701b38f4aea113b372bcdfcebaf966723416. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38W2138904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc186c208fc632bceaa7d7c0d432c4d5a781a0dfcafc67a6bd9192468c3cdd1f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38W2138905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606a9fac0ef35dc7179ced9d361dc8cf258b9cf7df4840a9d10d11ee785dd3e2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38W2138908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc450d9e9b67cefc81a06df19508e7b16687d169bdb987bacba33c3d9b21dfbf0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38W2138805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd9565e8b52774b3f56fea74acfe9b90bad173782e0984bc5fd320555405b1c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38W2138806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc940c1540f45e20984f7566f6cd1d1f9ffc642124d69c8982edb5e239901681e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38W1733901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f3f3d9c41a2699c403782df1d537041348692a7d3d516a9ccb609210cf7a4f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US38W1733902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab611618168de6c28a0546d0ccad095a911542c3b1761631954855bf707c1b7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US38W1733904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596dc1b50e149bdf3a8a76f20caef6c12396380e27dcaee3cc18efde234c8660. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38W1733906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f623194eca35d9a33ab389863379deb506b79e0a89433e838a8d37c4b995d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US38W1733907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97a938e6fdffe26801d393442fc73b746216ff238bb8d4faf5e9a29ed7b374c. 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/US38W1733908.
You Are The Light (by which I travel into this and that)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69b6a8aa0b92aeb0f80b28479c4a885dcfeab3bbeabf474f6b605926f758cb0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US38W0410469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696b7fc714df8f9227688f4e51e85d2e87b948532ed20fc3d493e9320ef5f866. 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/US38W0410476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea1eb85850b4fd98e2b6ffcd076776d8e858c99eee4ea73322a9f26e460fbbc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US38W1121101.
Sipping on the Sweet Nectar (The Epic Remixes by Ultracity and Bogdan Irkük A.K.A. Bulgari