thumb|300px|Stamp commemorating the birth of Joseph Schmidt (Deutsche Post 2004). The musical score shows the title of his 1933 film Ein Lied geht um die Welt (A song goes round the world) right|thumb
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 0x8141833561705aff728834c29149901ac9e23096d6e2c74c783dc064a898b272. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5c218f2a-3577-4bd3-8c74-c0370a14fb27.json and https://artists.proofprofile.net/proofs/artist/5c218f2a-3577-4bd3-8c74-c0370a14fb27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le postillon de Lonjumeau: Freunde, vernehmet die Geschichte (Live)
Don Cesar: Komm herab, oh Madonna Theresa
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 0x92dcb016baae57c31d79f1286592fe51409b386ea2e5c583ca9589fb712a2d30. 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/DEAD60401708.
L'elisir d'amore: Act II: Una furtiva lagrima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41144b6bd5d0de495e24757814840114fff4ee5bb9e501b222d31a2803d12563. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60401718.
Der Favorit, Op. 122: Du sollst der Kaiser meiner Seele sein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb45639722b512cde0250e2c992f9f5bd371d0d844c931414460642f990379d. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEAD60401741.
Joseph Schmidt: Complete Studio Recordings (Remastered 2022)
Heut' ist der schönste Tag in meinem Leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4029f92e5cd51455722caf98f27ec463c980ad2d3d8491e6e24883241fff1df0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLGL0813734.
Joseph Schmidt: The Complete Recordings, Vol. 2 (Recorded 1930-1932) [Remastered 2014]
Schön sind die sterne (From "Der Liebesexpress")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9442d039c919fb4edcd89427296981e2554c0b26ab9e8a8992bbdf62b61439cb. 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/DEL111400328.
Joseph Schmidt: Ein Lied geht um die Welt (Inspiration)
May: "Heut' ist der schönste Tag in meinem Leben" (Lied aus dem Film "Heut' ist der schönste Tag in meinem Leben")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6769e8b786128015aef820b4b58c3d5dbf8e9c6a1dee8a8503d887a4e3fc7202. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEA340702953.
Wenn nicht die Hoffnung war (Remastered 2022)
Der Favorit: Du sollst der Kaiser meiner Seele sein - Remastered 2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a00354b201c61130df9a65e56ab3b4d2d61ea9498919d1124e58ccf53a93567. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEL112201394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c1b192c112a4f6946b2682b045e4fecbe16db4e9eb40aba137ebb782eb2e06. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8XC1910688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22610d07eb72cac5e4e7288ed8617877bbbb0b7aa75b3b5ffe76e8b5c885dab8. 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/GB8XC1910701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144a5eeb0fbee84ea0fe0bc4ed5764605b4326af46833493edfe48eb677bcca4. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GB8XC1910702.
Heutist Der SchonstemTag in Meinem Leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d1484e447bfb09a9f141e00d28d98929832f5c93dc42429d279324bc380c17. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GB8XC1910703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1315d937eaa6946e159ac0c9c5e801d61b8a21d65719ba1c59244d0c96c58e58. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GB8XC1910706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c16dd22a1f51f4010441c457d8faf313fc14792f5107a5cf2a22c8145f50d4b. 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/GB8XC1910710.
Songs and Arias from Smetana, Mascagni, Niederberger, Lehar, and others
Das Land des Lächelns, Act II: "Dein ist mein ganzes Herz!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5efa22951a23b3247b78e903d220fea7b76aaec1754d790b56d0170b6a39f2. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QM4TX1706479.
Funiculi, Funicula : Joseph Schmidt, The German Caruso
Joseph Schmidt: The Complete Recordings, Vol. 4 (Recorded 1933-1934) [Remastered 2014]
Joseph Schmidt: The Complete Recordings, Vol. 3 (Recorded 1932-1933) [Remastered 2014]
Joseph Schmidt: The Complete Recordings, Vol. 1 (Recorded 1929-1930) [Remastered 2014]
Joseph Schmidt : The Complete Recordings, Vol. 5 (Recorded 1934-1937) [Remastered 2014]
History Records - Classical Edition 97 - Joseph Schmidt II (Original Recordings - Remastered)
History Records - Classical Edition 96 - Joseph Schmidt I (Original Recordings - Remastered)
Liebe kleine Frau, ich muß dir was gestehn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd369d3f6615272302162480e11dfa8ee903792f3e58e70dff9f5e8b343ef83. 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/DEHB51105878.
Land so wunderbar (Arie des Vasco aus "Die Afrikanerin")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19291c64ef57c0f90e978fa3f0ac3bcc763f464b19caf51a412e763764e7e82. 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/DEHB51105885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ffe4179d398c00145763e4124460b91bd9314d45f09cc6ca2d503ecc678d09. 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/DEHB51105890.
Wenn du jung bist, gehört dir die Welt (aus dem gleichnamigen Film)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089c34edc44c5addf3140c17274e41d7ba218f748b36510b5d2ba867c5a5aca8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEHB51105891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049fef0e6d585f30cad523335bf3d7c8a2f5447c0ff8f6f3690152eb6b8f19be. 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/DEHB51105894.
The German Song: The Voice of Joseph Schmidt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6dbcd336eff2897aa0342d406da49ee868637c94d82bd7d609123db8fd40c98. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GRHR11140102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4019c202eb384c8060ac86297acba42f6cd5eda6ca21076b5bd57d026a6a14. 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/GRHR11140106.
Schmidt, Joseph: Arias and Songs (1929-36)
La bohème, Act III: Kokett ist dieses Madchen (Mimi e una civetta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1031583a7bb7f6d8abe04fbf433ec6e0fc639bf917197bd539c3412e7d0fce5. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/HKI190758813.
Joseph Schmidt singt Canzonen und Unterhaltungslieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d8e6e40183558845d5e818cce4b907bede1b96f7f7cc38058ad8be6c70397e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130252721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb40bbaa4e6a6b91effbce1352433f0d5e897df9c885dd5b3889a7202a568c1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ATP130252722.
Du bist die Welt für mich (Der singende Traum)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7439f28a185ed1285f1911c92fc3df0b8573fb2d68ffb67853c7619fae82ec36. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ATP130252735.
Es wird im Leben dir mehr genommen als gegeben (Heut´ ist der schönste Tag in meinem Leben)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476dfca9b3bf650ffcc5a525ceb8ba25f953da7782b16f7203eab6aaf1b78770. 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/ATP130252738.
A Star Fell From Heaven (A Star Fell From Heaven)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b50f07a8f66a40d31036b8f69b108252f121e4a7d02975777fa57ccbd28499. 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/ATP130252747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9330cc4ce061f79420df0110372e84abd9bbc1e6c84b03be94fd2bc18c7bae71. 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/ATP139526816.
Joseph Schmidt - The Complete EMI Recordings Vol. 2
O marenariello - Het vissersmeisje (Das Fischermädchen) - 1992 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5aff2827400ce3f271ad9d668b57016352acfbe1d44a5e3415e1b8edd51eb3. 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/DEA340702965.
Ernst: "Liebe kleine Frau, ich muß dir was gesteh'n"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d093dd09c5754c75a5e83813ed0af476a9a6d43cdb10e1d02ff2d8fcc63b75. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEA340702958.
Joseph Schmidt - Complete EMI Recordings Vol. 1 (1929-1937)
The Unforgettable Voice Of Joseph Schmidt