Nina Söderquist (born 6 May 1972) is a Swedish musical singer and actress. Career Nina started her career on Wallmans salonger and as a chorus singer girl behind many of Sweden's most popular singe
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 0x327c0c93d3c3e2f40829c32a91b6a7a506c72b5dec2472fa2550e78b3e9cc018. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0eff109-296c-41c8-ab1b-da9543c77a4f.json and https://artists.proofprofile.net/proofs/artist/f0eff109-296c-41c8-ab1b-da9543c77a4f.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 0xf8c7044858f86cf80bb040aed8eef81ea8dc79a518c08ed5909603325c06145b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SEVGE1701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9950841dad2df067671fccd004d88b0f7c58c5767f80bda5f9170027dc5db8a. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:22:17Z), 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/QZMEN2388692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275043ff4b164f2ed032d4205a766952293c2f1c78f316f405166ed8609b88a6. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:08Z), 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/SE6UB2500301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f3a3b9a39b3c08ee2bd4604921cb818b373e8b361d1b4520037ef25a8d47b2. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/SE6UB2500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b900448b88d30b233b4f800fb58836be2dc42d882772c26ab2153ad1a7687ae. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/SE6UB2500402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028a1a6146e1d025e96c689a8ee34b513dded5919f3f484f923c585a51c28ce3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SE6UB2500403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c7b70265c5a8170af5daf25ec256f7fe420a977cb5de4a5db1cf8768f171ed. 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/SE6UB2500404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55176826ca266e29fe6a0933893e0c24060742614f10c2d2cd558a427ba0f29. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:26Z), 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/SE6UB2500405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de66af3f13f1760c5cbf315b79d1507bc322ba581c7af38e7ca512fd47869e0. 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/SE6UB2500406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a0c1c22ff24647368e4f673d658ac09f213ca95e33c1f00ea58e332add66ed. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:26:43Z), 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/SE6UB2500407.