Sanna Viktoria Nielsen (born 27 November 1984) is a Swedish singer, television presenter and musical theatre performer. On her seventh attempt, she won Melodifestivalen in 2014 with the song "Undo" an
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 0xa99116c7b6b40dac9b60b06c85f97e98ac1b108d89a4ed447403d7c400b59bf8. 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/3edd523e-b8a6-40ee-a7bd-39df6a6a86a8.json and https://artists.proofprofile.net/proofs/artist/3edd523e-b8a6-40ee-a7bd-39df6a6a86a8.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 0xf439ad469ffbc8e15bf4f0555755ab2081fcb6b942b83ef403bcb162a0b70ace. 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/SEBJC9609030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01e0b7cfec1c5c1ea3e601fe0b7c3172efd2209c9af1d6c3e38a32f6ca72938b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SEBJC9609070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b40d2e27d9d3baae04573b58f4ea7dc5b232ad576a2ed4a77ef80a5076ac33. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/SEBJC9809010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5921980667ccaee76767487996445253114192f4212c93fd04a99f7aaffa8441. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEPQM0613019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120e925c73ad7de247bac8b1a2ec4e7da31f6fa5df70e072dd4fd1edb5ab1c3f. 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/SEPEL0502101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5eb1de2eb4d62a3329140b413a01ba8abde84bf02abe020361f83bceff1a411. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/SEPEL0610080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64825f5767d1fc38de788a118aa8edf77c3b107363bac733ca1d84b18de3c62. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/SEPEL0801302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd284ba8cdff64e6c2208ec5a89466acac350b820e2427c2913a88c335a1473bf. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEPEL0801312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f4c5f45338d718f1805252839cd1a0eb3daa9ea9e1ec5a5946c500f4fdf1a39. 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/SEBJH0616010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f2fc33a3d4461f022d722b0ebaf0db93c6b1ea863f32729b02a7e4147b44b7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SEBJH0616040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e070dce8c59b3aaecac4c74b0900efacfc530835b36574f3d5433737f980ce5. 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/SEPEL1100501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95f7679230938e36f5335ce247093f9214992f37865442122ecbf7e415009da. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:52:20Z), 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/SEPEL1000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52230623d3f6900d7ba9d0a7a42ab642bf031701660c7183561ab84df9beb698. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/SEPEL1100702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b531f28378c8c76bb6670346fdac3419bbffab4e2dcca865df90235bd7d10f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEPEL1100703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d551defe50126e89bc8a6e0ba60072601f7db9f4d37b048175407f25dbd19e7. 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/SEAMA1201257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8199e98033368a452e06493d97cbc12fa384c494f1b7a32faf945894fde212. 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/SEAMA1201266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e73d98f61e629adf050b32ea3c739cc5213843b28c9955a6877deb6fd8c1b0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SEPQA1300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d73b28e870266b47ced07a95680304bf560cba890a05e02ed6449b68b4bf63e. 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/SEPQA1400296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dd9d2488ffc10780e3789cac6b007b8c7a3b6ee5cf5bf9817dd35d78f90c94. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/SEPQA1400488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25876ab7997f0859e3f9eb432469648b6193cae744fa1d0c0eda37f429b235d6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/SEY051400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c138c4fcaadb4103f060489ea4915756c6ee8e48249dbf3fde25c4e63ee068f. 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/SEPQA1500770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31b2641fd29ed5089e1563824f0ec4902eda2c389f7e9f40962d89f2d196195. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SEPQA1800148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e547de990d6cfd39da1aa1cf10bd599da61a1c59357cd844a837264b489049. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:21:06Z), 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/SEPQA2000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3efae2b53d55c0554b2897d064b9a4adc1a3c69344ec8c59ddb32cbbc37063. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/SEPQA2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e547de990d6cfd39da1aa1cf10bd599da61a1c59357cd844a837264b489049. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:17Z), 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/SEPQA2000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588b06d6d87e7a4072af492666e053883fdb8aef5d86fe0ef318536a133f719e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/SEPQA1800340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abb308cb71cc00ff1fb52c7c9726c242e3cce2731a98530c9488ba2b8377ea5. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/SEPQA2200229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd76bc91fe9a48d2913c0569f26a6a06f298ef0521a4a9f0ee4f5099079e6ba9. 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/SEPQM0613057.