thumb|Frantz in 2006 Justus Frantz (born 18 May 1944 in Inowrocław, Poland, then Hohensalza, Germany) is a German pianist, conductor, and television personality. Life Frantz began playing piano a
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6207700fa4a6dc334abdc5ea3eaf3379f40d8fdba1f65789cb1e96f603903b1. 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/6763add1-23be-4a11-9b67-c263fb66e266.json and https://artists.proofprofile.net/proofs/artist/6763add1-23be-4a11-9b67-c263fb66e266.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Best of Justus Frantz & Christoph Eschenbach
Klassik die man kennen muss! Die größten Werke der Klassischen Musik
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f3468dc4bca8de299efd386c8599eef8f7b870e83af2a88177886a873bbe8d. 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/DEE471800479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c546fbdc90502a1ff744d9be620cb0845238de1b1dbbe5e9acd4480d2d4b9d1. 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/DEE471800193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe398d80ebe15d13cba9bc38efe22c35420ddd94f4b1f3269bf70a21468b97aa5. 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/DEE471800172.
Scène Moderato - Schwanensee (Swan Lake)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f13edb3e5faea92dbc61170cc0f8ec888dc3b74c6aa529e38b24483bd5549a. 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/DEE471800478.
Piano Sonata No. 8 in C Minor, Op. 13, "Pathétique": II. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aca616554be0fafd3af64d3b4f0ab538fe5c2a648ca902d5f50b60ff6a45785. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEE479100119.
Piano Concerto No. 10 in E-Flat Major, K. 365; K. 316a: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeabcdd284c9d14a1d82aab2015715e3fcd009b619afc491e6f6dc03f2bd173d. 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/GBAYC8100013.
Classical Music Essentials - Best of Orchestral and Piano Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f13edb3e5faea92dbc61170cc0f8ec888dc3b74c6aa529e38b24483bd5549a. 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/DEE471800478.
Piano Concerto No. 7 in F Major, K. 242: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbad3828623a90582ea9a002a2553aa11ad7d07897e9f9e4599b8875812bb531. 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/GBAYC8100194.