Konrad Ruhland (19 February 1932 – 14 March 2010) was a German musicologist. Biography Ruhland was born in 1932 in Landau am Isar, which, at the time, was a part of the Weimar Republic. He studie
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 0x01ddc84144ba21c09f5ce57dbb1a6d4a90a0b1b83301c231e6a6322c1f47f79f. 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/9607f4b7-026f-4ae2-936e-301d9923da30.json and https://artists.proofprofile.net/proofs/artist/9607f4b7-026f-4ae2-936e-301d9923da30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Isaac: Missa super "O praeclara", Motets & Songs
The Quintessence of Chant (Gregorianische Gesänge I & II)
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 0x07fa6b74909aef6566f2d826040d0eb657886cf8cccf371f201b3d86f3fd0284. 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/USSM19504314.
Gregorianik - Die schönsten gregorianischen Choräle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1e75debe570666100de6c0e9fc1ddf1b1166e110a408fb3c03afde882a0dcf. 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/DEE869400469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac44eb79aed6a18a196935a896de9cd4192cd5ea4b8aa0ab0f148aa226c225ef. 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/DEE869400470.
Antienne: Nigra Sum Sed Formosa - Psaume 121: Laetatus Sum in His
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cf1ab25dde7061821412d58a9ecd81181a2b9ac6781756561e4611b60fb74f. 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/DEE869400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf38e706cd1bebcd1a015ab9b94bc096522bb59d653595bbe9525a9c66bbab339. 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/DEE869400475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e1765e76382ab62cdcab0cc5652cbc0720f86265c3717f701a15a7a83a99f9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE869400477.
Antienne: Cum Audisset Salutationem Mariae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225c2e820bd335dbf8c2767011ee5c4aff97de15a870cd239de317f2b5fe6cb1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE869400478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a22a468dd9b31a75297f94d1fcff619c0fbd4ea4f2fab3c40e443cd7b3a6985. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE869400479.
Antienne Mariale et Trope: Salve Regina Misericordae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8ba0ca9837bc6174d67bdf22e9d7d838966dbd2f1b240fdc0acd2577efff60. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEE869400488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ab14dc15be888c00d67bc23038d95278510fee024a754dac1a7b440044483b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19504308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fa6b74909aef6566f2d826040d0eb657886cf8cccf371f201b3d86f3fd0284. 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/USSM19504314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7df07c7979ba987303ef9c059f01061fc58aa9b8bb0eb0c272a61ee95be953. 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/USSM19504322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289e31d69c0a556c6a7cc91ec7171311ece71944b59dc659e39e06621751fd05. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/USSM19504325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d1aec63e144e4e0cc5a4dcd03c6e51e946fdc3ee30e63d1ec4d2f797fc679e. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEA299804600.
Agmina celsa sunt - Gaudeamus omnes in Domino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baf749b35a8649c2a8145c01c8ff5635b9d2cd8e8973074a4882151452a77a6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM19504330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a89cd5d15f8ac06dad5e9dd2cb92667c24df7c6cc1a4635c91c3870a691d50. 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/USSM19200451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27bc9b0bc088809179ee9b54a465c76e4a2fd91686d7e3f004f02c1007f349e5. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USSM19200462.
Ut queant laxis (Hymn to St. John the Baptist)
NPR Milestones of the Millennium: CHANT - Hymns and Sequences - Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c75daef944e1968a2315336a52703ff1f425f5d84fead2649a49e0aa31c327. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USSM17800124.