Sven Bert Jonas Karlsson (born 11 March 1971) is a Swedish actor and author. He has won two Guldbagge Award for Best Actor in a Leading Role, the first for Details (2003) and the second for (2021).
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 0x66727a54ce40e4ee3d185180adf94005b918a2e7c7560e49318b8520e810fb91. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab3d2184-fd41-490f-89fa-400404f5e763.json and https://artists.proofprofile.net/proofs/artist/ab3d2184-fd41-490f-89fa-400404f5e763.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 0x279c2c01424ded279763058e0ca31e061a0475b362a3958aebf836d69a08339b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEWDL6020865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6e79bd0634c66c8aedbb5ddf5bd8d778d6a8fb61afa05cb829b4d434ac2988. 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/SEWDL6020866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcabce176833270ee67e262210900d92aa8cfe3125f07dc959a7f04c1e980762. 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/SEWDL6020868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcfc64eb47744034ea2b7d65fb5257d4c903b1794d3dac0be435f5c8fd71483. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:56:19Z), 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/SEWDL6020875.
Harmonica (Original Score from the Series)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c357f13dd8624b7acaf21b5acdf7be7d9e547751166c70b2f3a975d85befd62. 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/HKI190649601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3bf84f0d65abf1f30c0b460ab059cfb5db9f1f67de9797d58fdbb53c1a3ad7. 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/HKI190649602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10faea87626b7a199b43d95081ace7c829a1c2f5933096add79ca2349dc15d86. 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/HKI190649607.
Have Yourself a Merry Little Christmas (feat. Jonas Karlsson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571a8a4969a79609ca827b7c1c5702361234b96c5a32dd1999c97f7d807c1ffc. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SEWBD1408022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f414437760a277776c5597d8a940b613ed5faa0abb2b45bb1fd3f86edc0887b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEUM72200727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x258327232afc388241a40ced797080783309e6774c1e49d9847eb0e2024b9417. 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/SEUM72200728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a739f3bb541a282710727066a47aca4a10dd884758d2d3f6b8afd44d11cdbc9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEUM72200729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d1e06972f3015fe8c616b0d488298b269cd4fefe76b705df0114208f27e793. 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/SEUM72201007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a739f3bb541a282710727066a47aca4a10dd884758d2d3f6b8afd44d11cdbc9. 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/SEUM72200729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1f35a464d4e50db3dabc86e0218d8ebb6eed56bc5d7f2d9e992ea26c5e4eb0. 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/SEVGT0604615.
Snurra Min Jord - Musiken Från Föreställningen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07430827c9aaacaae231d97558122c0fcc30fec5cc3b673a6a803c1ea377e170. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/SEVBO0901212.
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 0x838b028a0d122cd2e362b79b35ff7cecc61700d7f64410af200a1d4fe0d2196a. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SEUM72201010.