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 0x04b1825e5f73969cf0662cac6a5b2e2dee27a54503b8d7d87eb809781aa71051. 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/b1d7caa3-b0f7-4429-ad66-08df53521798.json and https://artists.proofprofile.net/proofs/artist/b1d7caa3-b0f7-4429-ad66-08df53521798.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sinfonies de Fanfare in D Major: 1. Rondeau
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 0x36f9e345ccd6978598335f60ae3d4c9267ecbd748cd75bb174ef31a263fd7ec7. 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/DEF058501881 — a six-check JSON result.
Mille ans de Noëls, orgue historique de Villeneuve-sur-Yonne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61744c71d406c590c0d383dd2ec627c86fe092446a65d56b28731c18457b0a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CH6542374098 — a six-check JSON result.
Giovanni Battista Pergolesi: Stabat Mater
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab8a5b709e5e9b2bd154e3faf8d96f22aa23a3e6a1ddeda942475a02741efe6. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEN421521005 — a six-check JSON result.
80 Pieces of Keyborad Music in Baroque Era
Advent Music (Choral and Instrumental Pieces)
Regensburg Kirchen Musik-schule Instrumental Ensemble
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53ddc6e3f373b69f2acc66c6bc5923ad621847abfae22ce69440003c26bc33d. 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/DEB908700102 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd14f089cce3a02a6fe8659d0f09340be581e1ec8fe3e6f69b3248d1e62c436. 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/DEB908700103 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafada0cb40fd737faef9d4e3fb2a59d9add91239b09e493769deb3b3522d0026. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEB908700107 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b302b7d4634c33323f3ed1cda2ebe5c00c42e9530ffeebab55720dd6ae8650. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEB908700115 — a six-check JSON result.
Trumpet and Corno da Caccia Concert - Sprenger / Hertel / Telemann / Haydn / Mozart / Torelli
Overture (Suite) in D major, TWV 55:D8: IX. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66642cb04bc0df16ba96ade7cf8566a205dc57e5f0c04a80e2551d3d3f18e404. 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/DES380008802 — a six-check JSON result.
Zelenka, Rathgeber, Vivaldi, Fasch & Sperger: Concertos for corno da caccia
Ludwig Güttler - Festliche Klänge aus Dresden
Bunt sind schon die Wälder: Volks- & Wiegenlieder (Inspiration)
Valentin Rathgeber: Augsburgisches Tafel-Confect
Der Heiland ist geboren - Arr. for 4 Trumpets, Percussion and Organ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe798b24014ff93f127f902f2d39945c555cbf19a144a8979951c40f83abbcc9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DELJ81616018 — a six-check JSON result.
Handel, Molter, Hertel, Rathgeber & Sperger: Trumpet and Horn Recital
Concerto No. 17 for 2 Corni da caccia and 2 Violins in G Major, Op. 6: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeab42a6760a1502b40ba56ac6aeb5537225540a46039087c991862cec14238. 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/DES380004275 — a six-check JSON result.
Wagner: Baroque Organ Music - Organ Works
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f4a321a55c17fcfa68548e8302fbb043530e5623419aa354f79a60266fa9fb. 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/NLB150551176 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb413b02e955b77c3be33cbfaa6770cae7614bea5bd2c8c93b500b4d694555cd6. 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/CH6540833954 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d9e9eac849d45e13c9449ddcba10e014e0aa80720da131ec08a594825afa50. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/JPP592354126 — a six-check JSON result.
Serse, HWV 40: Ombra mai fu "Largo" (Arr. for Piano by Genta Takaku)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602ff46fcdf3d2d266398a19b19c616ca33528b49ae7ef7e41fe0cd9f771d47a. 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/JPP592354171 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a85d06eeaf9e7bed648d165240d3e0aa99356a09716126088beea0c749feda. 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/DELJ81618814 — a six-check JSON result.
Reichenthal: Organ Music by Martini, Scarlatti, Gheradeschi, Moretti, Rathgeber, J.S. Bach
Jacob: Missa dei filii. Music from 18th Century Prague
Trumpet Recital: Vivaldi / Zelenka / Neruda / Hertel / Röllig / Franceschini / Mudge
Nun komm, der Heiden Heiland (Weihnachtliche Musik aus 5 Jahrhunderten)
Violin - Collection vol. 2 (classical music)
Bach, Pachelbel, Buxtehude, Grünberger, Königsperger, Desponsatione, Rathgeber, Muffat, D'Aquin, Dandrieu - Christmas Organ Music
CLASSIC TUNES - BAROQUE composers, vol.2
Christmas Music - Eberlin, J.E. / Rathgeber, J.V. / Corelli, A. / Vivaldi, A. / Noelli, G. / Gruber, F.X.
Gloria: Festive Music for Trumpet & Organ