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 0xd7efb29b5f463f6a73faf07ca1eefb4470e68fd6996ef08ac6a9f64a61857fa2. 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/ff23a233-7225-4b69-8d66-276d1a4d46ca.json and https://artists.proofprofile.net/proofs/artist/ff23a233-7225-4b69-8d66-276d1a4d46ca.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Rimsky-Korsakov: Flight of the Bumblebee
It Is Written in the Stars: Classical Music for Stargazing
Gymnopédies: 3 Gymnopedies: Gymnopedie No. 1
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 0x63ed804882ee5fce7b7d63c0794130c99cbfd663c0d6f562e2f926cca7760899. 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/HKI199298726 — a six-check JSON result.
Festgesang, MWV D4, "Gutenberg-Kantate": No. 2. (adap. W.H. Cummings as Hark! The Herald Angels Sing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef896206bfce3c90ef61c8d21c6f6faabafb25d82bd25da9e160a053cb0c25f2. 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/HKI199337019 — a six-check JSON result.
A Guided Tour of the Romantic Era, Vol. 11
Rachmaninoff: Symphony No. 3 in A Minor, Op. 44 (Digitally Remastered)
Rachmaninoff: Symphony No. 2 in E Minor, Op. 27 (Digitally Remastered)
Glazunov, A.K.: Orchestral Works, Vol. 16 - The Sea / Oriental Rhapsody / Ballade / Cortege Solennel
Rimsky-Korsakov: Maid of Pskov (The) / Fairy Tale
Piano Concerto in F-Sharp Minor, Op. 20: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd94827e49e59e1ae851ddd94e8e6d477dcfb3509c78424fb2722267e22b330. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HKI199702701 — a six-check JSON result.
Piano Concerto in F-Sharp Minor, Op. 20: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5a2e74cd1c25093e92366455c74fbf72c0393b50f4bcde70df2a12f6d717fc. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/HKI199702702 — a six-check JSON result.
Glazunov, A.K.: Orchestral Works, Vol. 11 - Concerto Ballata / Chant Du Menestrel
Chant du menestrel for Cello and Orchestra, Op. 71
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee091c3c851b7be2c742cc88b2399d7320d421aaa45cc8032087011c18fcfc1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199645302 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f1122d30baa4d3f79438a71f7b2495909371ab7b01f759262cdc3ef9172e07. 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/HKI199645303 — a six-check JSON result.
Glazunov, A.K.: Orchestral Works, Vol. 10 - Suite Caracteristique / Le Chant Du Destin / Preludes
Song of Destiny, Op. 84: Le Chant du Destin, Op. 84: Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8aad8a455c715bab6f7bf539ae9498b7e22096a3626850ad7ac335667bc4f3e. 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/HKI199624701 — a six-check JSON result.
Suite caracteristique, Op. 9: II. Danse rustique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e07cbfe173343c495193c6f60de20e2018fd2489329801217ecdacb57a3fd6. 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/HKI199624703 — a six-check JSON result.
Rimsky-Korsakov: Pan Voyevoda / Sadko / May Night
Glazunov, A.K.: Orchestral Works, Vol. 9 - Finnish Fantasy / Finnish Sketches / Karelian Legend
Rimsky-Korsakov: Christmas Eve / Night On Mount Triglav
Medtner: Piano Concerto No. 2 / Piano Quintet
Piano Quintet in C Major, Op. posth.: I. Molto placido
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7bf6c001d532526c5aa55dfdf51c014e73f5169ea23a197eb4d078051996af. 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/HKI199642904 — a six-check JSON result.
Glazunov, A.K.: Orchestral Works, Vol. 6 - Carnaval / Spring / Salome / Concert Waltzes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eebd5c14c6b2cb5a13ec92c5e709388e8ff5f0104813578020e9a042a977543. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199620403 — a six-check JSON result.
Scriabin: Symphony No. 2 / Symphonic Poem in D Minor
Glazunov, A.K.: Orchestral Works, Vol. 3 - the King of the Jews
SCRIABIN: Symphony No. 1 / Reverie, Op. 24 / 2 Poems, Op. 32
Balakirev: Symphony No. 1 / Islamey / Tamara
Scriabin: Symphony No. 3 - Poem of Ecstasy
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e065d6e925b907af161dfc34fd47962ab56f048b5bbf58576b9495918fd0ec. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI199207701 — a six-check JSON result.
Relaxation: Soothing Sounds of Classical Music
Peer Gynt Suite No. 1, Op. 46: I. Morning Mood (arr. D. Sosin for flute and harp)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe8e64320949a0ac33a491d01e7d761bbecf85406e8ff2440d4546eec379cf5. 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/HKI199717615 — a six-check JSON result.
Bach-Humbug: Classical Music for Christmas
A Guided Tour of Nationalism in the Romantic Era, Vol. 5
Symphony No. 4 in F Minor, Op. 36: I. Andante sostenuto - Moderato con anima
Polish National Radio Symphony Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221419436808da885f2c7966c4e6859bf2ec5854eca6bc5901770c1d05ff9d8b. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/HKI199317405 — a six-check JSON result.
The Nutcracker, Act II: Dance of Sugar Plum Fairy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2951012faf8fa25c2a8106083adcb0c6f371e6e2af66b38973b949d85727a417. 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/HKI199339803 — a six-check JSON result.
Rimsky-Korsakov: Scheherazade - Balakirev: Russia