Annemarie Kremer (born 2 June 1974) is a Dutch operatic soprano, known for her performances in the title roles of Norma, Tosca, and Salome and as Vitellia in La clemenza di Tito. She has appeared at a
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 0x2af649b57a4d1e68bf8d0fd183399e35ff096c3e845fab997251a05d0f3f9a2f. Chain 2 (Bitcoin): anchored in block 954556 (2026-06-20T12:14:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/af5fc68b-4cb1-47e5-b8b7-edfc517db7a8.json and https://artists.proofprofile.net/proofs/artist/af5fc68b-4cb1-47e5-b8b7-edfc517db7a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Beethoven: Symphony No. 9 - Complete Symphonies, Vol. 5
Choral Classics: Mendelssohn (Sacred Choral Works)
The 5 Psalm Cantatas, Psalm 42 'Wie der Hirsch schreit', Op. 42: II. Aria
Württembergische Philharmonie Reutlingen
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 0x2a6687d5541c2b37d7082d850a6b9704bc564ff76ba3931b191d366f0c00c03b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331106629.
The 5 Psalm Cantatas, Psalm 42 'Wie der Hirsch schreit', Op. 42: IV. Coro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5a5f43f0f4181533a70ece86e20dc3e77904960b3f3017fabfd06d7482c67. 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/NLY331106631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4370a4dd252f2ae413bd9a90d20acbace94c80de06138b520e63bc751f4e30. 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/FR8Z02000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338b4133fdbcefad70c32221e923ab776826d91bc3b684384a8f2ec6bf59d7f3. 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/FR8Z02000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0971b0f5d217cb9b6607fe644df14830aefeeaa1fd5eb7be4036722f2bad1c9. 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/FR8Z02000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17a091997ef060c5a1423889157e50cffc1ffd2af7bd9caf2374d7b1697b6d7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR8Z02000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db166f92375e5c3c8c62b0fcfd1588b4ea3c06ba822f4e6ebf438b2ebaef39b. 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/FR8Z02000083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0173781964e93a238a65e7e31ccc0a28cb6e228ae63ac051c2f81385385da6db. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Z02000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f8ca181e6d2d0ec994d128306c4ede96b0fd04fe592ebfc20831c01d9b2769. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR8Z02000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2cbb0fddb6cb834d50cb1adc4ef98d1eda8a1eca34dffab312982c3a2b0598. 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/FR8Z02000088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae83b7ee78fa28a0cd89c158fb4054a5c3e23fe459b10d23542907ff96d35a95. 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/FR8Z02000089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb824fe09312123d7a7431954a4a00dfdce7db4f374e1190d5ca5da3b1e6fc459. 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/FR8Z02000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826337fdf1b4c8d4b0c13b8214c859e37745d7207e26aa22527f5f54941dd464. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR8Z02000093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ab270e1e2bf323af60d6d988717416448eafc77664790e3f56ba9735a2e51f. 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/FR8Z02000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525ef7e2425457d5a372f5ad0927352ea9c2d530e1b566815b98e9f7b256b485. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Z02000095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ba07ddc5780ad3f474d277219be3493426b5ea75ec417c2823388e10471b7b. 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/FR8Z02000097.
Messe solennelle en Ut Majeur, dite messe du couronnement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e630965d27b488133cea80e8bd1a1191fdc0a503e2b61032e064c96486b6d6. 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/FR8Z02000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99bfa80fdc8b52b49dfbf77dee2cce778cbd8cfccb7b44c3978f82a44a7043ea. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Z02000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021bc256f1cbbffde3f5bf85f415257c3d85a14629270db137c6daf0921e563b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Z02000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f86e3ff1a8759d95928f8261e7ac9d45c5f8163e808c9ac01b8d980c13d32b3. 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/FR8Z02000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25c0982d4564cd02c81c6e77eda8dc78a6b57e883db2eb42d775e3c05d61d7a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Z02000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091313759719183ba0c131612890008a51f64e849deffab0f296ad0a4f41924d. 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/FR8Z02000117.
La flûte enchantée, air de la reine de la Nuit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23005fa999f36b4a89ac6da7124172ab61573dc17485acbb15fb6f52670ff79c. 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/FR8Z02000123.
Grosse Messe, Great Mass In C Minor Kv 427: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad9e47160a7ae65e02b1a14f5cea63f59370276bae6a54cbb36fee59151fb95. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLN580515558.
Missa Brevis In B Flat Major Kv 275: Kyrie
Kurpfälzisches Kammerorchester Mannheim, Nordic Chamber Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2304e74ebba8356b2c500ae06a02ac846eb5b45629b3b7f74a8fad3d5a509dbe. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580515585.
Missa Brevis In C Major Kv 259, Orgelsolo Messe: Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ba522ce8c5ae72574f3e7f646d3c660a46904b5ed6adbc5ce42bd3be819dfa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580515597.
Missa Brevis In C Major Kv 259, Orgelsolo Messe: Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98d547acc99f25099791163f83c8395367fd157c8eeb184c2c10d8a6a44bd5e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580515598.
Missa Brevis In C Major Kv 259, Orgelsolo Messe: Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22c5dc40c6b3ae7ef9bd8d6076495b2d683c253d8e7e7f460953cb724e5d106. 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/NLN580515599.
Missa Brevis In C Major Kv 259, Orgelsolo Messe: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169556e740979223f3725ffe6985c6c3511df51ce68ad262a7f3a9d560d74487. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580515600.
Missa Brevis In C Major Kv 259, Orgelsolo Messe: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a87c394783a2c4084878f26cb5d0d4fa066f89e28c2400111925aaf706ebc8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLN580515601.
Missa Brevis In B Flat Major Kv 275: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca2dceaff5ad2a7f13e7d6a9475485fcdc0b896d6a0201cd84ba790a370e346. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLN580515590.
Missa Brevis In C Major Kv 259, Orgelsolo Messe: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453b871ff2ba102f4be2344e68fdf6a0e700044ec41b8821d13106a8a924eb60. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLN580515602.
Missa In C Major Kv 258, Spaurmesse: Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee14d722ba1354c66cfcf3ab96cf21fd8084be7252eee69dab4e1b7fd1605a7. 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/NLN580515607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9b56bbf8d096a55d6f07e1eeafbcd91c20c72f3884e9a045eb358da3ad3b7e. 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/NLN580529173.
Korngold: Das Wunder der Heliane, Op. 20