Tuva Semmingsen (born 13 January 1975) is a Norwegian mezzo-soprano and coloratura singer. After studying at the Norwegian Academy of Music, she studied at the Opera Academy in Copenhagen. She made
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 0xc61b16044986fbdc0d1a07e8cbd48567ac3833ebb829f9dd53777f5bcbee7ab2. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79402fd8-1569-4905-9728-548ed194e718.json and https://artists.proofprofile.net/proofs/artist/79402fd8-1569-4905-9728-548ed194e718.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Gloria, RV 589: I. Gloria in excelsis Deo
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 0x3c8d4f1559fa58c5deb4f5d29c72b5d5471a1868b0601846e37ca462537e8808. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0484901 — a six-check JSON result.
Gloria, RV 589: VI. Domine Deus, Rex caelestis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246804de5cba34450426462c7098c2d51bbc02d1fadb27a708c11a23717063c3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBAJY0484906 — a six-check JSON result.
Gloria, RV 589: X. Qui sedes ad dexteram Patris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a07124ecd2b96fa6236c7bd6e1a38c95119cf53d3dda42745443eb5435e0fe1. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBAJY0484910 — a six-check JSON result.
Nisi Dominus, RV 803: I. Nisi Dominus aedificaverit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4632b1a42f2edeaebd3da9415ecb81c6445757273d06d5e5d99e6428bee7d49. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0484913 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0dbc80ed2f9568e159f90c1587b9740fa8c7e87fce46fdfa9e065144aceba8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY0484919 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea8f9afc2cab17e474d9d27f996017d6b9e22d2c96f926fe37f669927a1e798. 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/GBAJY0484925 — a six-check JSON result.
Vivaldi: La Senna festeggiante, RV 693; Gloria e Imeneo, RV 687
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a875128bcb12bb6a91defd0c5103a22708b805fc44027790dd04c342aa228f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEU901501322 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3f6a1505adef819f90f9f3394acbc49e558513c5a37eeee32560e137167a9c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501323 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7026ade12af5dd889b1b1a3c6ff6f975d3e58c152fa383a227cb0b40e27fbd. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501324 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076021ce3b97ab365bd9efd96bc3a4415ab650475428f4ce0dcc48dda8357d66. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501325 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bfe54182112c779b3cd599808c34725d1199db8ff35e1d67a4b3c4c7b484ba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501326 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad9386034ea9bcf7e11c3deec6ccf235a0d1162d7665005108b8151fd03f28b. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501327 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75f827757ff2dcc531ebcf1ef4c3cb52ca0648e9316f8d476ae4c8f3a854bde. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEU901501328 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa160565ba02ce7df7907070baa636ad285dae4efac37c933ec7d093c7c13d9fa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501329 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc7232586c307e703899f155633f1d8fcaa473e7ff13d1d2f6f9923af523040. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501335 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8ef4103490bc048b74a20ada2f2b6a5ab090dd5b272f664088bf9eb7484365. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501330 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86db7952415bd0154e5805b591473e0fb9a3e6d3b4327ceecb2835c60afa342a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501331 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558aa9fd405894fee4d47a82cce873198e3ed5234874168206cf26c87e8d530f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501332 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2b6017ba9253c775a22159a2c68567402321e1477b803ce834ced2425860ad. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEU901501333 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9270187cd1c3bdb400c59e091fb4c1645a5540fcec194150575194d3d2d15df. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901501334 — a six-check JSON result.
Theodora, HWV 68, Act I: Air. As with rosy steps
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02c1520b5c6e8e6597a6850d892f28a1f0cb134bc6f3faffe5d92c0c8f62f5a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SEAET1297120 — a six-check JSON result.
Fantasymphony II – A Concert of Fire and Magic (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5661e5dc97377de84c5b13f13f53d204984f7c7ac01316e25f248715a1c0072f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502207 — a six-check JSON result.
The Rings of Power: Main Titles (from “Lord Of The Rings") - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c7659b4e84e139af1357ad8ec50bda466e604e34d99bb82096f13a1252ea95. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502208 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85eb48caa4bca8ee2466d6ebadda1bfb90b729bbdc184c0788a0ec3cda65024. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502209 — a six-check JSON result.
Warriors (from “League of Legends”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0e99e5a60290b32712bc47485083f6bd4bf76e4860413536f703eff78118d3. 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/DEU901502210 — a six-check JSON result.
Dragonborn (from “The Elder Scrolls V. : Skyrim”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612391c2359bd3b86ddb58d1143b36fc40de35e752f455cc7d412ac72762819f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502211 — a six-check JSON result.
Elden Ring & Malenia, Blade of Miquella (from “Elden Ring”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee551137c03d145109ccb6a61b4ffc9a08c194251cdc14dc9bfc10173e2796cb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502212 — a six-check JSON result.
Double Trouble (from “Harry Potter and The Prisoner of Azkaban”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368d51eabb28009af31f4bc4f2faa1aaa5055fd338c26850ffac615d3506b7d8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502213 — a six-check JSON result.
Fawkes The Phoenix (from “Harry Potter and The Chamber Of Secrets”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be8ff8134161713ae9bf89ac4027e96e1b310260f2e8d3a78e9881cad41daa3. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DEU901502214 — a six-check JSON result.
Fantastic Beasts And Where To Find Them – Suite - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae60b83408451008bccacf8c149b94110018d0d9b401f74e0aca9d1f448d5d8e. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502215 — a six-check JSON result.
Breath of Life (from “Snow White & The Huntsman”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d199c7f5319e5c7a7c765b1f45b5bf6a57809ad4c9c80ac3cd087b4af5a3b0c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502216 — a six-check JSON result.
Jenny of Oldstone & Main Title (from “Game of Thrones”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ae200daa76f460b909672f1a53310b8301d0a9d305d2cad748a8be10292446. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502217 — a six-check JSON result.
What Could Have Been (from “Arcane: League of Legends”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd152f7a5f05190afe8412fd39a8b6a002dad6526a0bcadb7fe73d9a38b74b811. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502218 — a six-check JSON result.
Geralt of Rivia & Toss a Coin to your Witcher (from “The Witcher”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616e98e649a422378f3685d7f4170c9c3450837b5153a9df8b4f8596f347c88b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502219 — a six-check JSON result.
Scholastic Sanctuary & His Dark Materials (from “His Dark Materials”) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe9b5780695852ae526287d0e40eae79e7106de12c69bd8422495902a0eee9f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502220 — a six-check JSON result.
Arvegods - Sange & Romancer af Emma Hartmann
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb00dc2e0acb0c5a10b33856264b0b2c68558ef88ad01353a84183769f25f49. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEU901501480 — a six-check JSON result.
Breath of Life (from “Snow White & The Huntsman”) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d199c7f5319e5c7a7c765b1f45b5bf6a57809ad4c9c80ac3cd087b4af5a3b0c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502216 — a six-check JSON result.