Ulla Ebba Ingegerd Billquist, (née Schönström 14 August 1907 – 6 July 1946), was a Swedish female schlager singer. She was successful during the early 1940s. Personal life Ulla Billquist married thre
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 0xb4d22acb3aa8c469bfaabf052813eb53950766b6e1b91c97c236fa4241ddeb2e. 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/0cc2c301-fce4-4c1e-b4a4-3a93b76c0827.json and https://artists.proofprofile.net/proofs/artist/0cc2c301-fce4-4c1e-b4a4-3a93b76c0827.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0x6545ea4aa64779f57980e1228cbf9ab6ce1b2e273bfcc217904463812e26276e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOX9X3742807 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62abbe94845d18a79031d860d43c4fe299258cbe74b08ebf83becbdbe4071623. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOX9X3742809 — a six-check JSON result.
Kring De Små Husen Vid Gränderna I Hamnen (Under Der Roten Laterne Von St. Pauli)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe63945c6646f2e8c8882fa98d851dbb5be4ec29169cb5ced695b34c4af7f891f. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOX9X3742815 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010848bd2abe57f18d4ffdd0307d4d6756261e9d6f8529c76c854075da45c4d5. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOX9X3742819 — a six-check JSON result.
Ulla Billquist: Viklen melodi det skall bli – 21 Original Recordings (Recorded 1939-1940)
Vilken melodi det skall bli - 21 originalinspelningar från åren 1939-1940
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae687072e16c2e8ce996d5e52a4a239bac9b2dc9833e5d5736ac63227cdfe2d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVCE1000806 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8945accc5b3655e7028db5e3ee0dd4593b675d9551613263f560c24757b1326f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVCE1000516 — a six-check JSON result.
Godnatt-Valsen (Auld Lang Syne/The Farewell Waltz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152f335c8600b1bf116ab7fd374fd1c60aa50a835fd3b19a9b59f01ae26ee268. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVCE1001208 — a six-check JSON result.
Den Kompletta Ulla Billquist 1931-1941 (Bonus Version)
Den Kompletta Ulla Billquist 1931-1941 (Bonus)
Den Kompletta Ulla Billquist 1941-1943 (Bonus)
Den Kompletta Ulla Billquist 1941-1943 (Bonus Version)
Den Kompletta Ulla Billquist 1943-1945 (Bonus Version)
Den Kompletta Ulla Billquist 1943-1945 (Bonus)
Ulla Billquist sjunger Jules Sylvain, vol 1
Ulla Billquist sjunger Jules Sylvain, vol 2
Jultoner från förr - Originalinspelningar från 30-, 40- och 50-talet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8861c33b77699c1f38e2f68aa0e611fd380a67d5eef8e32bd59704051c6152f9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190615202 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebbe1430288fb98d7e96b7ed2f4958fc05e33667f0d1d2d795a66054d631f3a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190615242 — a six-check JSON result.
Sommartoner från förr - originalinspelningar från 30-, 40- och 50-talen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d28bc4ffe028a63d31fa2c383ede554201c9a394e1862f40ea87e39cc0db25. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMDA61872433 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a01a5707dff52d9cf045f15ba8a6855134cf880635b03bbbd35a58ff22a2a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAZE9412010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ad5160c7437d08597b7c97d51e5eafca0e420007cf41ae7cd3bed5c2259503. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAZE9411040 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a53cf1d7a726de735c4395a1b6d4de58f8aaddf5654af8196cdb564e8e7bb0. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAZE9411090 — a six-check JSON result.