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 0xd7f61ae0a250bcac007b543f82dcbc756782b7092fad4f3d486b80c01d41519c. 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/a38ee52c-8108-4517-9381-50bd9ab5f9f1.json and https://artists.proofprofile.net/proofs/artist/a38ee52c-8108-4517-9381-50bd9ab5f9f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bacewicz: Complete Symphonic Works, Vol. 2
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 0x72ff5b17a6c8852e00cbc157ae54c48b21e95e970cc7aa0005fd8445acbaf054. 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/DEB202366001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee411622bb3972e4e17340de35c5b739c1537dbb4495748ba9b623b33e1d0924. 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/DEB202366002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ba0d9f9647757dcb3fe18133400e2fa1d3cbeb4733ab7e20e0d37fec0965a5. 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/DEB202366004.
Symphony No. 2: IV. Finale. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa282af1aa6f3f2b93ee6fff06fc0b21b4b51e701d878f2f8d85cfb28d0a17e0a. 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/DEB202366005.
Bacewicz: Complete Symphonic Works, Vol. 1
Urlicht: Songs of Death and Resurrection
Königskinder, Act III Finale: Verdorben! Gestorben! (Fiddler's aria)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9944c2285b8b37bf34ab9d6feb69f01740bc319b08bdab863d512e153428261f. 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/FR7JM2376020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a3af0c475f2aa7f6fa61f8aacbcce9471d38558d05a476c8d4b6a9873f7283. 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/FR7JM2376040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dd4fc42f505267107839b009fb192014fcc8b70f822cf7bacc2ac01c23e57a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR7JM2376010.
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
Die tote Stadt, Op. 12: Mein Sehnen, mein Wähnen (Pierrot's Tanzlied)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e14c69bf20c78df373712f638b6d14f7004664ad749be8a48c24f7183ea98fa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2376030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45f37fbe4ee96448e428dabac36ce865b56d858def0966d25cc47c814f261ac1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM2376050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb4c6390edb728ca4e72458fd73cb71faedf5b5d07421df7209f25195eb3a0c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR7JM2376060.
Rückert Lieder: Ich bin der Welt abhanden gekommen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656cc1a99ddbced9b4d33d2342fce0c5a6f92ad5efd216e3f55ebca9c6ea6a0e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR7JM2376100.
Feliks Nowowiejski : Piano Concerto in D minor "Slavic", Op. 60, Cello Concerto, Op. 55
Myaskovsky, Lyadov & Rimsky-Korsakov: Cello Works
Halka, Act IV: "Nieszczęsna Halka! ...Szumią jodły na gór szczycie" (Jontek)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2c2c50aae22a9c1914d4c9aa606d0e09f09d1d84705b886cda0d4480e326b0. 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/PLA392100123.
Poradowski: Violin Concerto, Op. 70, Double Bass Concerto, Op. 26 & Symphony No. 3, Op. 29
Gablenz & Paderewski: Piano Concertos (Hyperion Romantic Piano Concerto 83)
Tcherepnin: Prelude to "La princesse lointaine", Op. 4 & Narcisse et Echo, Op. 40
Prelude to "La princesse lointaine", Op. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910edaa9e4c14fa114f158c0b12aa0ad4c4abe73a9ceed753458df278ca24208. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB201825001.
Ben-Haim, Bloch & Korngold: Works for Cello & Orchestra
Wielkopolska 1918: Songs of the Wielkopolska Uprising
Alfvén: Symphony No. 3 in E Major, Uppsala Rhapsody & The Mountain King Suite
Alfvén: Symphony No. 1, Drapa & Midsommarvaka
Bruckner: Missa solemnis in B-Flat Minor, WAB 29
Sinfonia Iuventus. Muzyka Polska Na Fortepian I Orkiestre
Vaughan Williams: Riders to the Sea, Op. 1 - Holst: At the Boar's Head. Op. 42, H. 156 (Live)
Stojowski & Wieniawski: Violin Concertos (Hyperion Romantic Violin Concerto 20)
Violin Concerto in G Minor, Op. 22: I. Allegro deciso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b84fd3770c2eb8479762c1df27b9d32e5cdb011db542d2fda1313fbf87c5f82. 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/GBAJY1610201.
Fantasia on Themes from Gounod's Faust, Op. 20
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847dc9ee3b2861a2210a958e792f54f99b54ecd3215be33c77ccab1dd8328541. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1610205.
Różycki: Piano Concertos Nos. 1 & 2 etc. (Hyperion Romantic Piano Concerto 67)
Piano Concerto No. 1 in G Minor, Op. 43: II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a6d87edf90e9d0eacd681d019ac3c109d5dea40bdd0dbdc36b79a07aa4674c. 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/GBAJY1606603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68776f897f2814d5372dc12e8c34fcb0400c9101d8394469e3307ab7ccf537c1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAJY1606601.
Lucrezia Borgia, Act II Scene 5: Il segreto per esser felici
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48178b18abf8b5da86d6847855f6dba99eed789e2a49d6c6222f0dd0ac0962f0. 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/PLA161413405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6d19854b4db26db9c769f8ba65f0ead26f3979a7ca60607a57f1165ac60d22. 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/PLA161413410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcb8d21f5cdeb6d9ccc3ab2656f7bcf4e41755ddcf314c4ed4033697e7dffcf. 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/PLA390918916.
Andrzej Panufnik: Concertos (Symphonic Works, Vol. 8)
Scharwenka: Piano Concerto No. 1 in B-Flat Minor, Op. 32 & Symphony in C Minor, Op. 60
Bacewicz: Complete Symphonic Works, Vol. 3