Karl Sigurd Tore "Sigge" Fürst (3 November 1905 – 11 June 1984) was a Swedish film actor who appeared in more than 130 films. He was born in Stockholm, Sweden and died there of lung cancer in 1984. A
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 0x34760433b45449fde8c682c49c1cb3ffb07418c891c514b512d3366f42fbf196. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cb116f7-097b-4809-b6b1-346a9adeccb8.json and https://artists.proofprofile.net/proofs/artist/0cb116f7-097b-4809-b6b1-346a9adeccb8.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 0x6e6f7ea90efa1f659a3d59ea6d5299fa7f3cd793eb769717d869b4d84ea9cc9c. 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/SEPQA1201076.
Samling Vid Pumpen - 2001 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03b307b9a87e4a0f20744cbba23c1b22632063475674bd9e73342689234fdc6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEAMD5700011.
Dansen Går På Svinnsta Skär - 2001 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2332b69d11eaf203c9cb690c921421cccc404f40c592932a3adb68f488e9a9d7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEAMD5700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604df7155afc6ab8ecc32422ea76d7c768990f9f2b565ef5f22f0990e1a42852. 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/SEAMD4900017.
Bonnjazz (Johan På Snippen) - 2001 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c38f0e2fa7b1b95c1105372de80820524c97135eebd983921ab62c32fcf6b09. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/SEAMD5700106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74389065d499bb812373ac43ac783ff7a39359ca72ce5f5ae9b1ac66e778fda9. 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/SEAMA0400522.
Schottis På Valhall - 2001 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56fa546f298618224695c9dadae7a3fdccacc4235a9a234b377ea1800d522b4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SEAMD5700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb51d4be863003a66a9cfdbe3f66f3802418389aa5f788cb149d3e5b9ef9fa0. 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/SEAMD4400114.
Vi Har Skjutit En Gök - 2001 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcab469de2952b45b5edb8209bc123be394ad57aef0610818067f3c555faf6650. 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/SEAMD5500019.
Tjo Och Tjim Och Inget Annat - 2001 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33fbdbf0f4c37f5ca8b4825d95e74aaac424404fb519cfe091459b7b9beb1492. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:55Z), 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/SEAMD4600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3399a3305c707b136bc7fd4768fa99e840fc26091fee86f4e0125ec3052823f4. 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/SEAMA0400528.
Sigge Fürst och Åke Grönberg sjunger Jules Sylvain
Jultoner från förr - Originalinspelningar från 30-, 40- och 50-talet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fc9584471d3a39c7517dcd6898576b68a8f95b1bdd0adfc40f607f73a7066f. 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/HKI190615214.
Dansen går på Svinnsta skär - 2001 Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2332b69d11eaf203c9cb690c921421cccc404f40c592932a3adb68f488e9a9d7. 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/SEAMD5700105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0bd3476d488ecae781d5cc37f9349d68c805ab4ab469c9f6add241b52bec354. 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/SEVCE9900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb51d4be863003a66a9cfdbe3f66f3802418389aa5f788cb149d3e5b9ef9fa0. 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/SEAMD4400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x604df7155afc6ab8ecc32422ea76d7c768990f9f2b565ef5f22f0990e1a42852. 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/SEAMD4900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03b307b9a87e4a0f20744cbba23c1b22632063475674bd9e73342689234fdc6. 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/SEAMD5700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897aff50a51570f5238bf4c7d47e131cc25cbc893fb607f1ba5fd459ad9ff569. 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/SEAMD5500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e011c673d5344e875fb24306ef947af80c9f558d9ed6bf5f6ba20ecad942c5. 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/SEVCE0700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe8b4d6eb2876d041a76c2dba2b23711ae81fec3474b9c479436816b31d181c. 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/SEPQA1600483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3168b33f6d3957f68d578f3bbb2bcd269b7402103ed195778339677b2a0c5a. 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/SEPQA1600496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478cbf075b540ece2dc8836cf95290326b1c65c3ad98a1a5d827bd5c05b57071. 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/SEPQA1600490.
Schlagerkavalkaden 1 - Fram för svenska toner!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f12ae7c7298f65c893f317d2f8a3539a5712bbb770a3f587d2b47627523cfb. 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/SEXCH1602117.