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 0x025c2ffba7cc69833b00357270264f228cdfd3b402694372b5e7d08e29a1eb97. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb8e9edb-da1f-44f2-af33-90de574b88b0.json and https://artists.proofprofile.net/proofs/artist/eb8e9edb-da1f-44f2-af33-90de574b88b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Balakirev, Glazunov, Kosenko: Russian Piano Sonatas Vol. 1
Violin Sonata No. 2: III. Burlesque. Vivo
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 0x16df0028bf3b067b965d658aa3fa86d916dd65599a36fad1ec0a1e8696d9307b. 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/HKI192311105.
Images from the Great Siege (Version for Orchestra): IV. Solitary Rider
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff5732c0d153e5362bbbd27aa3fd01e3eff72dd3ec4eba530daa99069283106. 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/HKI192014404.
2 Dialogues with Postscript (Version for Piano & String Orchestra): No. 3, Morning Serenade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50479e2ed32accb8edcfb9c0505d609aef14e3c48e004f379a567c994148d74e. 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/HKI191628903.
24 Preludes, Op. 53: Prelude No. 5 in D Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9f3eb5df9d95a8e904241f978ca3df445baf6fe6c4967796f50f62a3346a08. 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/HKI191063413.
Consolation: Forgotten Treasures of the Ukranian Soul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd628ab31872357daef6f73adc0f69b22e100b6eb0a8186771744d66f3b77497b. 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/SEAEX1622020.
Album from the Summer of 1901, Op. 39: No. 3, Élégie. La tristesse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd0a4985b2fa23f9a0470b0185c6bbf0cf464efbfb94ce61a12623e6e1c312a. 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/SEAEX1622040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3fecf078cbe343cda9ad93887a087d3e272e93cc69b02408b35105545605dd. 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/SEAEX1622070.
Prelude, Op. 1: No. 2, Allegretto pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dc6ef99bf6c37a6e993204518ea4e7cf06c53013a2d01a1982d73b8dfa656a. 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/SEAEX1622190.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe7810757cd9f63e4308b52d9de7bf7f08b4e111adf1a2e1e41438216de469e. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/SEAEX1622030.
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
24 Children's Pieces, Op. 25: No. 15. Lullaby: Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510d0ad972c9e47dfa3ec8d1910223550e3419adf1244c4443150b7e35ecd007. 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/US8271500516.
Kosenko: Piano Music, Vol. 1 - 11 Etudes in the Form of Old Dances
11 Etudes in the Form of Old Dances, Op. 19: No. 5. Sarabande in A Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadfb0bfb939930c833cf8cc572b1ad406a1c15ea322c6aad8ea3731ed8e7fc76. 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/GBJZY0600029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9b27ea80c186039fe47a9301060ac005d7a8cfa00890e961f39e1de61620be. 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/DEFG22375721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff41cf962db075d43eb6a186f25a607e3d10ce2b841cda4429f19e426fe4917. 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/QZNWX2141565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c9f1f4182e99ad5574b28ef7cb9b61ffe92c437f1a49298052432a6fec736c. 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/QZTB52281823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95193269f94e708c99e4196d69509ed0d4d529e585d6530708e220f184f17ef0. 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/QZNWX2141580.
Nocturne-Fantasy in C-Sharp Minor, Op. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fca75f040caef31348fcaaa87a35b8668b18d99fc1dda29dd48b46a8e84d97b. 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/DEFG21519504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5774297f750846c130e54d64fc9a9988a3c11d4c0f10dc662ea671cdceaa54ae. 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/DEFG21519509.
11 Etudes, Op. 8: No. 2 in B-Flat Minor, "Melancholic Etude"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b70dc99aa36d0bc21115db6b70ec717f72a8d6e97f00c1d795597c0d5e99dc. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEFG21519505.
11 Etudes, Op. 8: No. 8 in F-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c73c0da1a44f83fb61f401f81b651e03b3ceffe3a8e4c23f3780ecbe1464ae. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/DEFG21519506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd74a1165fd78bfdd3d3988b76c769b335398593b07d7cc0d0baada3ecf2d355. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEFG21519507.
Smile !!! Works for Double-Bass (Arr. for Keyboard and Double Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b94481413a3fc2efa44dc64d9871cd7c966e30e32610a3bc41cf01b6eaf7b8. 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/UK2Y21301538.
Anthology of Russian Romance: Boris Gmyrya, Vol. 3
Klassik aus der Ukraine/Класика з України