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 0x01fe0747e03dcb702d858b349feaf415f64c5dd81a6d26924b5d5cc136542659. 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/81873ae1-1e60-40f8-a7c1-7e6fe3ca1f41.json and https://artists.proofprofile.net/proofs/artist/81873ae1-1e60-40f8-a7c1-7e6fe3ca1f41.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Maidan 2014 / Cycle I: I. National Anthem
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 0x970d7d86cf744a59e26ec4c2d00f7420a699e27b0db9e85150f9aeac85b09a2a. 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/DEB331635901.
Maidan 2014 / Cycle I: II. And Glory, Mountains Blue, to You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804fa516579c24ac8c3f9893192c6019cbac0be4f5841ce5cc3b0e8b36a0d131. 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/DEB331635902.
Maidan 2014 / Cycle I: III. Give Rest, O Christ, to Thy Servant
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14eed8e75e2af946187aa8fcb527707c303ca270e431fe79a6002fd55f18d46e. 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/DEB331635903.
Maidan 2014 / Cycle II: I. National Anthem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c5271e367bbb7c0d89d80ec98fcc1d94fa2e3bebf1cebf88835529db862343. 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/DEB331635904.
Maidan 2014 / Cycle IV: I. National Anthem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0cf2b2b673b8d102199f24c45a69654fbaf1853cdec726d7e73936367a8cd0. 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/DEB331635911.
Maidan 2014 / Cycle IV: III. Prayer for Ukraine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c427d1c2b3cb85c601c094e2e90c5d6026be396fe64c5cdb8e1d9915023b53. 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/DEB331635913.
Maidan 2014 / Cycle IV: IV. National Anthem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8df0925989e584fe4f0538a47fe4897d3bbef0ff4798c3aa2463b0af76eef18. 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/DEB331635914.
Four Songs: III. A Cherry Orchard by the House
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb32738b7785e0b51f643d21c4fd4a45cbd11d0d0801f8c0dbc716245cc000aa. 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/DEB331635918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b56f798b864b9feb21b18f660c229c7624cbd697f0b6be969673e43d26b98f8. 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/DEB331635920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2d2267e92ec7927134b0e3700fc0e6fd7dad4f912721ef965349822fbceb05. 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/DEB330827902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f2bf368183575d865b1a23701387445180bda4402eab7a69f7a9230bf955f3. 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/DEB330611701.
Liturgical Chants: 2. Four Spiritual Songs: Christmas Song
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e3e2e5782c526ecd4ea89c4d58c4f0cc0f736bff0024ef48f3512f4c8297f3. 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/DEB330611702.
Silvestrov: Maidan 2014 / Cycle IV: II. Elegy
Silvestrov: Maidan 2014 / Cycle I: III. Give Rest, O Christ, to Thy Servant
Silvestrov: Drama; Post Scriptum; Epitaphium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5203ad436a0dbb33116bdabc7922239d6a44afc3f0517411034c5ba1e7699fef. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLE422301823.
Consolation: Forgotten Treasures of the Ukranian Soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e022c6de31cdd36b8e939a3cabf75944a9865eeacae208292a522b4fb9078c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAEX1622200.
4 Postludes for Piano & String Orchestra: No. 3. Larghetto, con moto (poco rubato)
Ustvolskaya, Silvestrov & Kancheli: Works for Piano & Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73e3d40210888dfc2d1ae052f6ec08285fef4ca0cafd4ba14863b49666754fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI191535304.
4 Postludes for Piano & String Orchestra: No. 1. Larghetto - Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3fce350703dee0b219ccbe983a1764d3a1421f594e93d76e48385a4c035702. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKI191535302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbdd644ab31b37bac3e6b77545ee8b7a116cbbacbb74263c83a27f05151a967. 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/HKI191535307.
4 Postludes for Piano & String Orchestra: No. 2. Moderato, con moto (poco rubato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b827da0c91342fd3ebaefd9116e45c7286c10f98af0f25d6a9db4df126c56c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI191535303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4a2f2414aff20de18c43a6bfacb2d05b97f3a98c352845e73a1731b6c58aff. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962302130.
4 Postludes for Piano & String Orchestra: No. 4. Larghetto, con moto (poco rubato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc27a8f32ad4ee488dc96b707b4a2b4b46b0d470a03fbf253f397ca67115a31e. 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/HKI191535305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb51b9f487434e06ee846a6f9a551bc065e432d4bf4f76061b36c50ad67e601. 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/DEN962302140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e99cb03f22371a80d80e5f1b29139c4becbc089d78dadfb81912fddb4e4ca1f. 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/DEB330077605.