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 0x181710fc5c17bfa83b424049fb40a2934256acb041c3cc0cb8832b3a8083de78. 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/7dd6fdd4-0974-4cf0-bc23-f20543163121.json and https://artists.proofprofile.net/proofs/artist/7dd6fdd4-0974-4cf0-bc23-f20543163121.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ホルン協奏曲第1番ニ長調 K.412+514（K. 386b） 第1楽章 アレグロ
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 0x868780694406c8f9afb5c1add7f6153a16cea61031ddbbbf516c913ef2a8128a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901502229.
ホルン協奏曲第1番ニ長調 K.412+514（K. 386b） 第2楽章 ロンド：アレグロ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b62f9878c84f79d0bb1e514356ae5f1564d65a7081256cdc99d4dc9d69e04b. 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/JPU901502230.
ホルン協奏曲第2番変ホ長調 K.417 第1楽章 アレグロ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee589fa181266e02d6074ac90fc3bf1e66b43de1ce31c3652c1fb3e7fe2c2d96. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/JPU901502231.
ホルン協奏曲第2番変ホ長調 K.417 第2楽章 アンダンテ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a409fe0afdc3537287e53c8fcbc67dd2ebe93f0bbd8d51e3920750570f6f63f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901502232.
ホルン協奏曲第3番変ホ長調 K.447 第1楽章 アレグロ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd6a9721ee8a895f3d84f492475edeeefa1f875a21fdd669d45e06ddd997fc4. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU901502234.
Brahms, Glazunov, Sibelius: Horn Quintets
Mozart: Sinfonia concertante, Music for French Horn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6818e209f89a81771b6a2ea44e78a3a25ff4737aed1ba986d185195f14ecbcf. 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/CZB871404011.
Händel. Bach. Mozert. CPE Bach - Berliner Barock Solisten
Elia Cmiral: 2 Suites for Pan Flute & Orchestra
6 Stories from an Enchanted Garden: No. 1, Meeting Chloe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0641346052930371dceb1e3e5c0d81fd140293e45f0941f3117a5856244bb0f6. 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/GBPT92409201.
6 Stories from an Enchanted Garden: No. 5, Tiny Pieces of Memories
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c6b820bcb04cc2e5130c3d6863d0d5ca27bbd7c766c2e73fd24f806558325f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBPT92409205.
Concerto for French Horn and Orchestra in B-Flat Major, Op. 91: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87de49a9fb5ec66091fa808890f5e0f2f06fc943871716dabc19daf5fa5057e4. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:20:29Z), 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/CZB872110004.
Concerto for French Horn and Orchestra in B-Flat Major, Op. 91: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d20e793f37ca11b68601a710d697fc9440ef023e8fd1a633d6efadd2a341009. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:19:30Z), 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/CZB872110005.
Cuatrocientas Estaciones de Ástor Piazzolla
Pokorný, Rössler- Rosetti, Stich-Punto: Horn Concertos
J.S.バッハ：３つのヴィオラ・ダ・ガンバ・ソナタ 〈ホルン版〉
ザ・ニュー・ディメンジョン 新次元 （超絶ホルン 驚異のチェコ・ホルン作品集）
Scaramouche and Other Concertos for Wind Instruments
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa5b6392422ada434c20b805aca8a0c8cf2fa793b99fdf5d08c53cbe5f05fd75. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPVI00714690.
ディヴェルティメント K.136～第１楽章（モーツァルト）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde8f2f785a19a036e033886a30dc1e5b20bf6f1d7df536132b3f6d8105b30ea7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI00325000.
ディヴェルティメント K.136～第２楽章（モーツァルト）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc868eec2224065786d9240e8822214a18cded46d2d8514bedaf0d86566b79166. 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/JPVI00325010.
アイネ・クライネ・ナハトムジーク～第２楽章（モーツァルト）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03253a0ae50e834e9227cf90dc0311ccdd96cb11830607090cea72139ec73156. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI00325040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b70b30fabc829b94259ef76ba4536ea74e90db162985c20340531621e924293. 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/JPVI00535460.
弦楽のためのセレナーデ～第3楽章（チャイコフスキー）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb281df7be262a01cd1b2fad11cf831b2c464e577a66b74b1f5a9557628c46cdb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPVI08921040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd290405db501a57fcb569a10a524b29f0c503979e0210570590a8e434fdb19a. 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/JPVI00605680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860036dbc7f76be082cdaad12b6e49f7c5cb98633f1bb66c10a883a75423f7a9. 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/JPVI00535410.
「コシ・ファン・トゥッテ」～序曲（W.A.モーツァルト）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7b390e734556a873acdea78645e9818af97e65cc2ffcded3397945dfddf86b. 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/JPVI00908980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07933990fdb880013ff11368d9762bbf6fed0ba22ea9bc421e62b46a835c8825. 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/JPVI00825480.