Bernhard Joachim Hagen (April 1720 in or near Hamburg (?) – 9 December 1787 in Ansbach) was a German composer, lutenist and violinist. He was the last important composer of lute music in 18th-century
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 0xb0427e09e9ec6f2959ff11639b20914d504f0d1872ec9c96ed7c241f0bea9259. 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/02fc11d7-3362-493c-8713-5dd8dbd5727d.json and https://artists.proofprofile.net/proofs/artist/02fc11d7-3362-493c-8713-5dd8dbd5727d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hagen: The Augsburg Manuscript Music for Lute
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95728369ec6c4d29d993c95c74f5fa9936debaeb8a3da6d6cfca2c9656d0be7. 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/USSM19904166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf74f9c58d161d0422b9ed7d060389f94aeb938f979a55da4a9b4efc618cd9d68. 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/USSM19904167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1234d7fbdec40a0bec3b19738b0d72a628d414c71ba30f19da5bc60c1994daa. 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/USSM19904168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa98d51854d071fea2df9558c4ddfa3ff18df8a563ac9fb167396433eb9c726f. 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/USSM19904169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80445b47c292f981da8a0705d85efcdae0b17960ee34ca0aa2a0b282bda58ea. 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/USSM19904170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103df0b42166c4b8029f58eae075db92bfa9b6f49d6afa8c4d212fda86478744. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USSM19904171.
Musical cure against the poison of the tarantula (Tarantella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990248e08c9f7a07014cb6ef49e56c09f1ba502823b4dfea1741301c3483f7d1. 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/USSM19904172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf28a896d2a0572e6e285c0f1f1b1c767f35b58cd9d50730a688fed862c79f63. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USSM19904173.
La cancion del emperador. Mille Regres (after a Canzon by Josquin Desprez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70928b4c0359321abe92cb78ec24de30125a23057180864649d7bba8997b5b22. 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/USSM19904174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c53776db6eed965a957ffbc08270591edd00e015ed40092d32d3839a3dbd6fa. 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/USSM19904175.
Cancion del primer tono (after a Canzon by Nicolaus Gombert)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c47c98b7450b8796909e889617050721ec18b1913aea7fd3884afed6d3323f. 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/USSM19904176.
Differencias sobre "Guarda me Las Vacas"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212730307777537c84d92f88512f9ed6de26beffaf90e13f7a0a72d88430f0ef. 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/USSM19904177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bdd1944a6d0d3ddf44b2ddf9d2026ef3fc9d2d7f04b1cc98bc1418820a6479. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/USSM19904178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd8a3747cdc69075bcc2fefddff3e1faa1405029320ae920a4fd829629c5ecd. 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/USSM19904195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f16a521ef576e95cafbdb8c78055b0ab9829f13ee6b799270678cd11da601e2. 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/USSM19904186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb840a2f10ec276393d5e9272b8bb3813dd0aae94ce251151d720b703a35044ac. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:55:59Z), 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/USSM19904190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90e2907389df0a043c75fc6a44d5eb689edb42dfd8d0f92fb3b631f0b678ae4. 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/USSM19904192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c629f5887e80d339704cf93cf5a477df7b65964b3ae5bb5633542fceda40a4. 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/USSM19904193.
Variationen 'Nun sich der Tag geendet hat'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4bb61ae83cee6c6be65ff48f01afbfc66fb80639bbf2fde3f09f9acd6a803e. 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/USSM19904194.
Franconian Rocks (Lute Music by Bernhard Joachim Hagen)
Hagen: Lute Sonatas / Locatelli Variations
Hagen: Trio in E-Flat Major: II. Andantino
Concertos for Baroque Lute (Fasch, Hagen, Kohaut, Kleinknecht)
Concerto for Lute in F Major: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73411c5d1ad956df66b7cd39d1828d372922229e8571f2fd1c9151511ce6c84. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FROV62437602.
Concerto for Lute in F Major: III. Tempo di minuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bf21424cad97643b28c54be4937ec6175516b24cfc1b050a12a6ccb55bbb74. 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/FROV62437603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5169daa485c358fa1e1747528cd566c195841755c422a17e6dd150014ecfe4ef. 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/FROV62437604.
Concerto for Lute in C Major: II. Andante di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce83c55a8740dd40b00b623b047a2777e0f5a443319f6ca2b8420dc4f68c88f1. 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/FROV62437608.
Admir Doçi - de Narvaez: Fantasia - de Visée: Suite No. 6 - Hagen: Suite in D Major - Schmid: Memorias - Sor: Marche Funèbre