thumb|Dieter Zechlin Dieter Zechlin (30 October 1926 – 16 March 2012Pianist Dieter Zechlin gestorben. Focus online. 19 March 2012. (German)) was a German pianist. He was one of East Germany's most pr
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 0xc104691bb505214c30dc1e1d16c7f1cb45ca2ab242b447ff475dea5bedace6ae. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95d0e2be-2a3f-4fbe-a2ef-db823f39b98c.json and https://artists.proofprofile.net/proofs/artist/95d0e2be-2a3f-4fbe-a2ef-db823f39b98c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Nabucco, Act 3: Va, pensiero, sull'ali dorate
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 0xb685f736b5e571c2028bb281404e4c6a3b2e7c8ce5cfbe0d0b1700e5331d8d46. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380001838 — a six-check JSON result.
Die 50 Klassik-Hits zum Entspannen - Mondscheinsonate - Schwanensee - Symphonie Fantastique - Blumenstück
Symphonie Fantastique, Op. 14: II. Un bal valse. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5488f773ae8de8742d672793d67a16bfbb46fe6dd7d32674046ac4203d90e2ef. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN060801534 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01786b2ae3f46ef064c79a2b02de215f2b272d1dd1522a707aa5142ca5656046. 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/DES380013262 — a six-check JSON result.
Piano Concerto No. 21 in C Major, K. 467 "Elvira Madigan": II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77abea8350da030f2dd3f56e40160e3d3f26977d744fb2568a38ad13390114b. 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/DES380013625 — a six-check JSON result.
Suite No. 2 in D Major, HWV 349 "Water Music": II. Alla Hornpipe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14a2109c6abc5018680c28084735db81c087ef2153bcdf95995e9229d782fba. 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/DES380620013 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7872e09bdaa9daeaa725f0e12b088aa4cab7a8c6d8246b1461821f9cf85d59. 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/DES380007005 — a six-check JSON result.
Concerto for Clarinet and Orchestra in A Major, K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a84e28a4faecaa9fa22b5f01d44e6ba72ac325a8cf22b325a55ca1556662a36. 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/DES380740002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6992f2b9e4de2b2d909eac0ea16fca73eb4fdba5592146c19c1dfee595b13d5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380823007 — a six-check JSON result.
Lyric Suite, Op. 54: IV. March of the Dwarfs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979fb15952ae6a824acc5e5b25067f7efc1405d44dbd20d4b0d0bd85e9ba3e12. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DES380014350 — a six-check JSON result.
Symphony No. 102 in B-Flat Major, Hob.I:102: I. Largo - Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19df2fdb0c84b4e8ee8f34a662546f454d4b8caf963c5d105fa3df5f1d8a6b2a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380009715 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bff21f56a3f162476098f31f40338c8cf332c0185ce586ba610ee0c2aad9cb. 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/DES380000623 — a six-check JSON result.
Overture No. 3 in D Major, BWV 1068: II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d1492d8d3a4fb04658f84c7a1f49055862ec3731eb4b9f626991739be49fd3. 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/DES380519101 — a six-check JSON result.
The Nutcracker Suite, Op. 71, Act II: "Dance of the Reeds"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdbd96de454d6011da9e846159ed5aafe54f33177c2fc31e53cd0f3f93b4646. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DES380519102 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4287ff937b3531f8ef21b08f29ce7bfc5a4ea4715489304326ada938a4e994b4. 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/DES380519103 — a six-check JSON result.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27 "Moonlight": I. Adagio sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aee11114fba86ca558d629012316f8f6dfb3731376110c72522bfd0e8052da2. 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/DES380519105 — a six-check JSON result.
Clarinet Concerto in A Major, K. 622: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc2e95b046e7aaa8473c32d556eacaf16d21417c634eb042d69851742043f34. 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/DES380519106 — a six-check JSON result.
L'Arlesienne, Op. 23, Suite No. 2: I. Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78a47cffa6dcebd909c68a926a7675eb1ef23ba82dc2c29b4af2d42d18979b8. 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/DES380519108 — a six-check JSON result.
String Quintet No. 17 in E Major, Op. 13 No. 5, G. 275: III. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac226011fcf6ddc6d96a25ca814764b01ceb490b9dcb437a27ff2c85ba9c4534. 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/DES380519109 — a six-check JSON result.
Symphony No. 6 in F Major, Op. 68 "Pastoral": I. Awakening of Cheerful Feelings Upon Arrival in the Country
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad7dcb70e96b28252cf2c7a4b4dad6f203370ea116874b4f4790592f5595888. 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/DES380519110 — a six-check JSON result.
Piano Concerto No. 20 in D Minor, K. 466: II. Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11d8f91b5a108f6653d8bbb787b9ed3fcaa2496676bcd5ddcd2384540c3a5ec. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES380002463 — a six-check JSON result.
Piano Trio No. 2 in E-Flat Major, Op. 100, D. 929: II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626ffff467f35ddfb7375ad0cf2abcff623f7e5d62b803ab3e239e2a51c5de68. 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/DES380002464 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b5688a07539aba97f27ed28d9f298a5f480a493fb373ab38fa99786eb3eef6. 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/DES380002465 — a six-check JSON result.
Antiche danze ed arie per liuto, Suite No. 3, [P. 172]: III. Siciliana. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd1bfdc777c959e82d008179f63344d608bf9ef6b67d84872f9d38223b85da7. 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/DES380002350 — a six-check JSON result.
Summer Classics - Klassische Sommermelodien
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855603b36f5200ee5abfb6af1c40c1e2a49bd50ce7d79de9f921a88938e1c783. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DES380000185 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed55b4ef361196ede439789f14e603cf2d96228bab958d9dd170752c262adb48. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DES380001827 — a six-check JSON result.
Beethoven: Concerto for Piano and Orchestra No. 1 C Major, Op. 15
LEIPZIG GEWANDHAUS ORCHESTRA - Legendary Masterworks Recordings
Van Beethoven: Piano Concerto No. 5 / Piano Sonata No. 26
BEETHOVEN, L. van: Piano Sonatas - Nos. 8, 14, 23 (Zechlin)
SCHUBERT, F.: Impromptus, Opp. 90 and 142 (Zechlin, A. Schmidt)
Schubert: Klaviersonaten D. 958 & D. 625
Schubert: Klaviersonaten D. 894 & D. 664
Schubert: Klaviersonaten D. 566 / D. 557 / D. 537
Schubert: Klaviersonaten D. 157 & D. 459 "Fünf Klavierstücke"
Schubert: Klaviersonaten D. 575 / D. 568
Schubert: Klaviersonate A-Moll / Klaviersonate C-Dur
Schubert: Klaviersonate A-Dur / Klaviersonate C-Dur
Franz Schubert: Piano Sonatas Nos. 19 and 20 (Zechlin)
Beethoven: Piano Sonatas Nos. 21, 22 & 24
Beethoven: Klaviersonaten No. 5, 6, 9 & 10
Beethoven: Klaviersonaten No. 23, 25 & 26
Van Beethoven: Piano Sonatas - Nos. 15, 17, 21
Brahms: Zwei Rhapsodien, Op. 79 / Schubert: Klaviersonate No. 19
Beethoven: Concerto for Piano and Orchestra No. 3 C Minor, Op. 37
Ludwig van Beethoven: Piano Sonata No. 8 in C Minor, Op. 13 Pathétique: I. Grave - Allegro di molto e con brio