Wolfgang Boettcher (30 January 1935 – 24 February 2021) was a German classical cellist and academic teacher. He was principal cellist of the Berlin Philharmonic, and a founding member of The 12 Cellis
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 0xd2457016ad8f7167aa3aa8871ac4674eca444282294c04102f4ae2e2f07ebdce. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5ff08ab-27b1-470e-8178-68c30b0a1723.json and https://artists.proofprofile.net/proofs/artist/f5ff08ab-27b1-470e-8178-68c30b0a1723.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Trio for Piano, Clarinet and Violoncello, Op. 114: I. Allegro
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 0x114d2aad026f8f35fbd9f9d76f137c467a2075e78e60a9d2544859615a5e637d. 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/GBAJU9700660 — a six-check JSON result.
Trio for Piano, Clarinet and Violoncello, Op. 114: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582d2b78870360986091f3bc134d4e8cde19f49a253533d81d504f80b555931d. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/GBAJU9700661 — a six-check JSON result.
Trio for Piano, Clarinet and Violoncello, Op. 114: III. Andante grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06778396e50a67e07f337b024b53692c748d4828dd734790340cabe1757a28a2. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAJU9700662 — a six-check JSON result.
Augustyn Bloch - Oratorium / Suplicazioni
Beethoven: Piano Trio, Op. 11 "Gassenhauer" & 3 Duets for Clarinet & Bassoon, WoO 27
Toch, Boccherini, Bloch & Schulhoff: Duets for Violin & Cello
Haydn: Cello Concerto No. 1 in C Major, Hob. VIIb:1 & Symphony No. 104 in D Major, Hob. I:104 "London"
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505ea581c643ef2b5aa2b5dfe824eb0edc6b4042d700db14600bfaeb3bc66ccd. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBAJU0800760 — a six-check JSON result.
Offenbach: La Vie parisienne: Gaîté parisienne - Can-Can No. 4 (From Orphée aux enfers)
Orchestre National de l'Opéra de Monte-Carlo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0af897014915baea37bc6955ae33bf332f87860aeee80fffb98796aa364d64. 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/GBAYC1204881 — a six-check JSON result.
Offenbach: La Grande-Duchesse de Gérolstein, Act 1: Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4000607817e14ea07c58196b63a89afba457be3c9658590cc3bff9afe40dfa. 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/GBAYC0402545 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b317d0b915e6e9790e4bd9993c743e031f639800a1fca222371feae53be7d4a. 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/FRZ118802739 — a six-check JSON result.
Offenbach: La Vie parisienne, Act 1: "Je suis brésilien et j'ai de l'or" (Le Brésilien)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe053d3cf9c229092bac5a3443e889a8c2cb2bf9baeece584ad7a1ab2e9750baa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605401 — a six-check JSON result.
Weber, C.M. Von: Bassoon Concerto, Op. 75 / Andante E Rondo Ungarese / Brahms, J.: Double Concerto, Op. 102
Bassoon Concerto in F Major, Op. 75, J. 127: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x442c1ffaf19d2cc540d0156e8979525548ca7e695fff41556a5becdddebfd883. 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/US2TL0909201 — a six-check JSON result.
Bassoon Concerto in F Major, Op. 75, J. 127: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc869f7c311c799e65e95c5f6823a4b355acfbcd34b0ce36715f57ab9484cbdf2. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US2TL0909202 — a six-check JSON result.
Bassoon Concerto in F Major, Op. 75, J. 127: III. Rondo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fa65497f19d2786db5206c2906d6a33e1cb31e8c3835e41d08883b2d082534. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/US2TL0909203 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2671029cc4cba472ff0a84161bc0a4d0db92b0b74815cc4a32b2b9d8cf1fe14c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/US2TL0909204 — a six-check JSON result.
Andante e Rondo ungarese in C Minor, Op. 35, J. 158: Rondo. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f273d3b1b31f0e13fbe92592c5b19583900ea44c30630ad28b3ec138cfea73a. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US2TL0909205 — a six-check JSON result.
Plaisir d'amour: Souvenirs de la Belle Epoque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8285c20944b2cba3473c0617121e0c9355b68984ff313ac13a4c96070c0557. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBAYC0600575 — a six-check JSON result.
Godard: Jocelyn, Op. 100, Act 1: Berceuse. "Oh ! Ne t'éveille pas encore" (Instrumental Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d3f1e9a10dc4d9f4649a7b4504b39c1a2cf6e9f745ef0bcdd35b47739ee809. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEC628700417 — a six-check JSON result.
Wie einst in schöner'n Tagen - Salonmusik der Belle Epoque
Klingende Kostbarkeiten von Conradin Kreutzer und Franz Schubert