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 0x075b4e5e9d142f2257563a7e48a091d45aed65e23e24aa21509746061ef86501. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7690f99d-d3e8-4af0-9733-ff71a79c77ec.json and https://artists.proofprofile.net/proofs/artist/7690f99d-d3e8-4af0-9733-ff71a79c77ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Elgar: Nursery Suite; Serenade for Strings; Dream Children; Sospiri; Elegy
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 0x708f5d0feb9a64e5f399633c582128eb863709e0ff237b832dcd471bae36e1fe. 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/USHM10025801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c35124eb0f7d0c478fc8f12fcc93b1954928bc9af63505b502599c219757db. 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/USHM10025802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93af48a6f54e26c3984c8b78dc692780e419ed068e6708f0b4c51c385c99912. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USHM10025807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d863c365094c8e23fd1f0ea76601f698a23077e16afc3ce1ac5a171bbe14dd. 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/USHM10025808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e43f45f21b8b7c18a010318fd5120b9f4d6a06ae3fb8b30754454c86ebad8a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM10025811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8fe28458b7ccc9dce6aeac14b469442e73af3400c1b114cad946f61d17791a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM10025812.
Serenade for Strings, Op. 20: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220220f9b5738c18e593810deb76ed3c13c63c87e1a08bb6768e8a936c846435. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM10025814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a45ede880fb52ae38a1112aa683de3ab502010b3e7ba478f74b56f7672272c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USHM10025816.
Mozart Wind Concertos: Clarinet • Sinfonia Concertante • Oboe • Bassoon • Horn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2c9f011ef284d5b81e9984979b7b7267a4ff0d2462a5a40d43e9ac50b3a325. 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/GBAYD9800377.
Traditional: Scarborough Fair (English Ballad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e9e503d9604a8d12158dfb50b5ed6b7c4c347fd387cdac260e0711a79ae2d9. 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/GBAYD9800378.
Brahms: 21 Hungarian Dances, WoO 1: No. 5 in G Minor (Orch. Kennedy, Lenehan, Messiter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef6f683ec77a9cf9146e32f564b3d4a0b59301b2a6e08b267011dc7914c1678. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYD9800379.
Bach, JS: Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd38a9777acb37a5e30cd02071a5bbb50c15239de9a6fe13ca983f9aca09c8f17. 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/GBAYD9800383.
Traditional: Londonderry Air, "Danny Boy" (English Ballad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55115ac38f4e861dd414d3b734647e4e62ff817e008341f7feb860c5c6de0877. 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/GBAYD9800384.
Monti, Vittorio: Csárdás for Violin and Orchestra (Largo maestoso - Allegro vivace - Meno quasi lento - Allegretto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83cc24396e918221f97a96f48e2a62e994d2b8bdb336336a64aec7ae0eee5d1. 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/GBAYD9800385.
Gounod: Ave Maria, CG 89a (Version for Violin and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b9c67317ed496252e485c34e7b9fe529526064c1fd775f638a09a913648eea. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYD9800387.
Debussy: Préludes, Livre I, CD 125, L. 117: No. 8, La fille aux cheveux de lin (Arr. for Violin and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0282e33e2fba8868dc6821098abd5fa38de37e328e3621e16f4ed4be12dc9a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD9800388.
Satie / Arr. Kennedy, Lenehan & Messiter for Violin and Orchestra: 3 Gymnopédies: No. 1, Lent et douloureux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c8f1e9f667d06e09cb0b1167b9fd1c186b73e7bcee2654539c31ff6c30db47. 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/GBAYD9800389.
Gershwin: 3 Preludes: No. 2, Andante con moto "Blue Lullaby" (Arr. for Violin and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5804bad801890c1bf8e21b118da3ac68d18bf50ea8210924678d0d0a39ae6f9. 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/GBAYD9800390.
Kroll: Banjo and Fiddle (Orch. Kennedy, Lenehan, Messiter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81c850aceaa209424d1009b248af5fcdce7b101fb9d5fa32d86f2f55dd5e103. 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/GBAYD9800392.
Mitchell: Urge for Going (Instrumental Arrangement of the B-Side Track of the Joni Mitchell Single "You Turn Me on I'm a Radio")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72dd0a9e5c8a407dfdf6a343cc6290a9d080511cd3d0d1c411ff43f192b4c5a1. 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/GBAYD9800394.
Vivaldi: The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98889fc823c660c955273136bf344b213508f875bd294e18a04fc36e07fa5905. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8900145.
Mendelssohn: Violin Concerto in E Minor, Op. 64, MWV O14: I. Allegro molto appassionato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36625d8500e800e1fbbf99073a49f1bb664f38f94daed4dbc9bd3d6006188cc. 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/GBAYD8700578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2c9f011ef284d5b81e9984979b7b7267a4ff0d2462a5a40d43e9ac50b3a325. 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/GBAYD9800377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c8f1e9f667d06e09cb0b1167b9fd1c186b73e7bcee2654539c31ff6c30db47. 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/GBAYD9800389.
Vaughan Williams: The Lark Ascending (Excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0986113b648fda5be81b63f9a6c4cb522bb5e52ca8d093600757f10839e6e6. 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/GBAYD9700153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0282e33e2fba8868dc6821098abd5fa38de37e328e3621e16f4ed4be12dc9a. 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/GBAYD9800388.
Bach, JS: Sonata for Solo Violin No. 3 in C Major, BWV 1005: IV. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4984e7298f58c92e55378aee7e166b69ac0546e6837bca20e69991fed22945. 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/GBAYD0000149.
Bach, JS: O Ewigkeit, du Donnerwort, BWV 60: No. 1, Aria. "O Ewigkeit, du Donnerwort" (Transcr. for String Quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5498c88203b5b4bb5e3dd5aca0a34777bd8bce6e15ebf7c5717e2717a2319b97. 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/GBAYD0000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55115ac38f4e861dd414d3b734647e4e62ff817e008341f7feb860c5c6de0877. 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/GBAYD9800384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e9e503d9604a8d12158dfb50b5ed6b7c4c347fd387cdac260e0711a79ae2d9. 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/GBAYD9800378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270ef80a2922042b8a5b9ba674a3fa323b547915b86f1e31e3b46ffbe5bd1ddd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC0203076.
Vivaldi: The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30b7fca374b19c84a3b82ff2f4493ea8f152b96514fc5bcba5a0b6a5f60530d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYD8900151.