Anne Sofie von Otter (born 9 May 1955) is a Swedish mezzo-soprano. Her repertoire encompasses lieder, operas, oratorios and also rock and pop songs. Early life Von Otter was born in Stockholm, Sweden
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 0x8a8f0dbc61a15ada178b5be8be1f795c3a1fa63694ed12802b99892a1f81fb28. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c113f360-4837-4aab-b98e-7d87c6dcd1e1.json and https://artists.proofprofile.net/proofs/artist/c113f360-4837-4aab-b98e-7d87c6dcd1e1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le nozze di Figaro, K.492 / Act 1: Recitativo: “Ah, son perduto!”
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 0xbbf16462ae26a568387830c1ada08f9191aaa362593bb1a84d5bf65c53453833. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T16:16:01Z), 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/DEN961531214.
Le nozze di Figaro, K.492 / Act 2: N. 11. Cavatina: “Porgi, amor, qualche ristoro”
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c5947799f3d43ed9cfeb248460a647e2abc3a79412c2a2cd8de99ea1e6fa65. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961531222.
Mozart: Great Mass in C minor; Ave Verum Corpus
Academy of St Martin in the Fields Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487ea79f17178fb1f393e07e1588785bdf2e5abb9e807f0521a46d0635617dd6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA509300113.
Anne Sofie von Otter: Mahler - Song Cycles
So Many Things (Arr. for Mezzo-Soprano and String Quartet)
7 Chansons grises: No. 5, L'heure exquise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1066b79bf6f6fa1739093389c837b9848ad54b7698f925d1a5009fca4bc3d7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ131306010.
Trois chansons de Bilitis, L. 90: No. 1, La flûte de Pan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc691d6f5070fb165e96ccc22838b1c8c94a24385aa6d31bd34f724c29a6f04. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131306120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60649c37fd5e86fc3e6dee659a2c12da78e49ee7e09ff6216703ef8b5f5d3618. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ131205010.
Ombre de mon amant - French Baroque Arias
Trio Sonata in D Minor, Op. 1/12, RV 63 "La Follia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0136bc65eee1cb8017f7553ae6e82c15bf7f288876c0614b407e5fd222f753a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960800840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0136bc65eee1cb8017f7553ae6e82c15bf7f288876c0614b407e5fd222f753a2. 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/DEN960800840.
Rückert Lieder: Ich bin der Welt abhanden gekommen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bc277b6d393fe0b6adf53dc813303cd696d3c63f8b6e8caa336315252930fa. 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/DEN960401704.
Ravel: Shéhérazade / Tombeau / Pavane; Debussy: Danses / Ballades de Villon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb341ed094d1324d134d263a811b53175261e2e12d792be3ef3ca296fe93ebe8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059901011.
Le tombeau de Couperin, M. 68: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998ea048c298e9cc9068f11e5bb0efb5c4a443634599bc206806c59a5e5e2a7b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF059901021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f96072afa3db7442327b32d4911ca9935628fa148da6d782f0c126445dcae55. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960031002.
Broken Bicycles (Waits) . Junk (McCartney)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bd06c7bc6fb96572cd454e296cfc4212fb4f5cd86a2776d948d79b3d12b2ee. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960031006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc660cbb7f49c594945b60a7b438f3369a7e1af860eb4ba1c9913438c86187921. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN960031007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329bf407a671ffc41f20b0367c229543b9692a57643d2a0795c35dafbbd7713b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEN960031008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f31672714f4553358b21d937f967b61db401c4409d3bf09d51d89cb770ad283. 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/DEN960031013.
Massenet: Werther, Act 3: "Pourquoi me réveiller"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46ad74f8c9f22b5fd1e3088ec343b6f54462ca3c6ca57e9e9aef3080987b4a5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ209516126.