Henry Krtschil (3 October 1932 – 7 July 2020Private Traueranzeige in der Berliner Zeitung vom 11./12. Juli 2020, S. 6) was a German composer, music producer and pianist. He worked for 25 years as a fi
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 0x53121393e1b8ca1a5d2e5a485cb2992eb0696a43639d18be473aec1005d93a6a. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de27b650-ea6e-4bc0-bd5f-62374c033552.json and https://artists.proofprofile.net/proofs/artist/de27b650-ea6e-4bc0-bd5f-62374c033552.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Die Rundköpfe und die Spitzköpfe: Lied von der belebenden Wirkung des Geldes
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 0x4101ddf39ac68db4bafc5115c7c30e54f4992160c9a521fb69976e8917af1cb2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380004185 — a six-check JSON result.
Schweyk im Zweiten Weltkrieg: Das Lied von der Moldau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a31450eaa6635c35a10c1e782bb63e38e85c10da81c205426c72fdcd60ab795. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380004191 — a six-check JSON result.
Mutter Courage und ihre Kinder: Lied der Mutter Courage
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7611c3e6d39fefccd39136056a259e9077ccdcaa36a1725d6931656b13ec62. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380004197 — a six-check JSON result.
Mutter Courage und ihre Kinder: Salomon-Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27df5496e40fd3e9a091bc1c81cafc54411ef4ab1e6703ef8df892daf148876d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380004199 — a six-check JSON result.
Composers In Exile - Zemlinsky, A. Von / Schreker, F. / Schulhoff, E. / Ullmann, V. / Hindemith, P. / Schoenberg, A. / Milhaud, D.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144cc490cc6615a5d71eb84fd77134e45a833031c9a8ff93a378b569fc4c1b67. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0943804 — a six-check JSON result.
Duo for Violin and Cello: II. Zingaresca: Allegro giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9644b8ffaadab9d564a8e71f56ea7da8b5fe04719a1b94f19d6fda51a41945. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0943806 — a six-check JSON result.
String Quartet No. 1, Op. 5: I. Rhythmique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d40f1d0fe741e14cff3921e020cefb72ede2f0ad01bea6c552cccb587238398. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0943819 — a six-check JSON result.
String Quartet No. 1, Op. 5: II. Intime, contenu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc48b9e217f7398903b037398dfb7b0c5161df313b747d93ccd4a2384fc96b2e6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0943820 — a six-check JSON result.
String Quartet No. 1, Op. 5: III. Grave, soutenu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a72fbe81980cfdae1d86a015af8f09f50cb9e04ab75f406ed11df7d3737387. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0943821 — a six-check JSON result.
Kleine Sinfonie, Op. 29: I. Thema mit Variationen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9241d673635c0d57c6fa275d7d8cdecb6d2cc5fb0660b611e63b11e9fc5afa4d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US2TL0943823 — a six-check JSON result.
Die sieben Todsünden: Vom ertrunkenen Mädchen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c2d66ecdb327abd6a4344bf453ea8dfbfa3d8e985b023f092d9902c73fa332. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331510781 — a six-check JSON result.