Tuva Livsdatter Syvertsen (born 16 July 1983) is a Norwegian musician (vocals, hardingfele and accordion). She was born in Oslo but grew up at Brønnøya. Syvertsen is known from a number of album relea
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 0x756810ef16c5556af6a2ff8f59d8c47eb8854e93875f630ed05697a85fbc7e4b. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bd18b1f-63fb-4004-ba3a-bd041081a960.json and https://artists.proofprofile.net/proofs/artist/8bd18b1f-63fb-4004-ba3a-bd041081a960.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 0xd0675a61a8d9d6d8610e089950557a452a6abe03238c1b662fccd5f662709147. 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/GB5EA1703567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1437c93b64b31618d848dc664995bafd57ecf2f5821c15c09bdec4679c208021. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/NOAGJ2300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f16a6482eb018e55dc6dcf91ef8144f337eaa1fed74050ba803eb7e2bbef3d. 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/QM6N22286931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d4f590a86b85d0c41241aaac0a0b579fee00d1cde1420cc83568b769e8ea6c. 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/NOEFZ1840010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf01c698b35288f8ca0c03d2207ef760cf1f5000dbe45b9419898fc0942987e2. 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/NOEFZ1840060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6a501b9815433cdea6e54574404d910eb16e8ca4c57b2db56212218023758c. 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/NOFKF2208090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92d5b1e6a4ce91520defd5a1a760e6f420a606c2748a1c1cb20878c7e36e00e. 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/DEA891600300.