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 0xc89d31bc59b4987d9d70f2f0f4316377844f2e9544168b2a636eeccb68b30962. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b00f11ff-4a2d-4a94-8b87-30ee6d100cf9.json and https://artists.proofprofile.net/proofs/artist/b00f11ff-4a2d-4a94-8b87-30ee6d100cf9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mussorgsky & Rimsky-Korsakov: Extraits d'opéras - Glière: Danse des marins (Mono Version)
Orchestral Music - Beethoven, L. / Dvorak, A. / Tchaikovsky, P.I. / Svendsen, J. / Nielsen, C. / Stravinsky, I. (Malko) (1947-1950)
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: I. Prelude. Grave
Taneyev: Concert Suite, Op. 28 - Tartini: "Devil's Trill" Sonata - Mozart: Violin Sonata No. 32, K. 454
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 0x65734e9af66b24db69fe8e11592b57d69c2a384cbd1abac1b58642fee4c19898. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAYC2400118.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: II. Gavotte. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0782063511a24d5b59099e3ba992855d3da15173c2237bae468a7f7a5c0348. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBAYC2400119.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: III. Märchen. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2f09dc4dfb36c50d187a48ab15b2c8dc350e751748a69b563890e49e0873cf. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2400120.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: IV. (a) Tema con variazioni. Tema. Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29653819671e4687e6142a6d102724300c281d01cea8b0d26dd5ba2a3b70e49a. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBAYC2400121.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: IV. (b) Variation I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6212f9e29674106d42a37d3ab39cae858d00db6107d2da1829e80ac0b1d8e27e. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/GBAYC2400227.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: IV. (c) Variation II. Allegro energico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4bd9325cfb8882aec0d2398a440c4616b62726f236b3a8b3d04d6cccdea8fd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBAYC2400228.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: IV. (d) Variation III. Tempo di valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53533cabda2abb07232b4c33d2c21216d01aa911654240645bb9ce17c73fba84. 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/GBAYC2400229.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: IV. (e) Variation IV. Fuga doppia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b431538c96f971a5ecd5a9a8aeb9e057ca42bb0e16eec48bd56a7310bfa4ba7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2400230.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: IV. (f) Variation V. Presto scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bacd808d4acf698d5ffcc43bcad2a89550f46f5b82126a31280001213191147. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2400231.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: IV. (g) Variation VI. Tempo di Mazurka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb9ce3792740db97f33b09ed7d9b561985f24b6f431f17458266ce58ca28437. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBAYC2400232.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: IV. (h) Variazione finale e coda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb24d68ca7d5423e46546969a99fe0262fa20cbe8875d29b1863184e53afac97. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/GBAYC2400233.
Taneyev: Concert Suite for Violin and Orchestra, Op. 28: V. Tarantella. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147d1a2bee9eb49974e8b3474aca4a501ef8ba5932510f9d7d0ecb9c4aee4524. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC2400122.