Alexey Ivanovich Botvinov () is a Ukrainian pianist. He is People's Artist of Ukraine, Knight of the Order of Merit of the Federal Republic of Germany, Knight of the Order of the Star of Italy, recipi
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 0x8cfdf28bf791707f06ea17323a362547e44d52ec3bb0a85ea3cc6cf7501d8718. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3158c85c-18ca-4d06-82c1-06961452518f.json and https://artists.proofprofile.net/proofs/artist/3158c85c-18ca-4d06-82c1-06961452518f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x2a9b022cf159db73b4243d76d95c53d99ae34903ccb745d772fa9fd8bdeadfbf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEN962300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fda98813e99d59e9a38e9d7dd97041f40ca1897d0e3744045322bc9849730e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962300312.
Double Concerto for Violin, Piano, and String Orchestra with Percussion: III. Misterioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672d296ebcee120d3922bfd5ab360634afedae550d307356ec844119d6623f87. 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/DEN962300323.
Lament for Solo Violin and String Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083911557647adc54fefb6bc3c8d068bfa7ece41040b0577b37401f4dffd9ec5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEN962300330.
Piano Concerto No. 3: Movement III (for Arvo Pärt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7fd8c57a3a088bfea6def1785053b44c39536c425850e40d20bfa85d306f2. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:32:15Z), 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/DEN962300313.
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
Double Concerto for Violin, Piano, and String Orchestra with Percussion: I. Misterioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa33e661533bdb270cb4a2b66609a7bbf14f988c04f0a38b1032301053c9511. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEN962300321.
Double Concerto for Violin, Piano, and String Orchestra with Percussion: II. Misterioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538dce4a0e07e8b8cee2ecd664ff05942c6bd190dcc37969b9e736db88935713. 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/DEN962300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72e01c1b35be93be01c21fa977208e9af68b328ccd28cd6a6ffd0ce9081cd0e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN961904221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a7daeb8a4a36003e0d3056e4022c9b1131895bc8608739341f5f452b377867. 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/DEN961904223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939868536faa66ffdb95e60cc406a7eb482b15bfdeb2be30886ed4b0f3b585dd. 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/DEN961904230.
Tango (Arr. by Andriy Rakhmanin for Violin and Piano) - From "Agony"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6eacf29fce5bd9bcd3eef5ccbf95afff7875bf4d2a52d85221773d96941e832. 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/DEN961904240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bcfd2513318980e348762e444bb0e1c1f4922e59fe5ed58e4906ea88dd0a7f. 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/DEN961904252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6752cf5d3b3b686fbe648843bd74ac79841a64c21c757f52625ca05c065e930f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEN961904222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919945d64cc31bec8818e0c8bc42b70fe96be2bd6083b3592a508b82adf27304. 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/DEN961904224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d95d74de8edaec0e9244df6aef17d5c78b43e81ef33979f4801745ef9ba96c7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEN961904225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3681033c97af270be37bbe0b6d4e65e03e69c13f3eef255b83829f977e2e151c. 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/DEN961904251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece2f38506a61e47dc188ed843dfa59d48ef9ace4a0a4d9fe44a1e97b3ce9196. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEN961904253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf383aa3a745b3f41e4758225c59522eb7d9e8b159a57ed0511ae8f3e70d3dd7. 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/DEN961904254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e270dedfa040d069466ccba516dfeefef03a4b3189d6d0c2277556ff226749e. 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/DEN961904270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a0338dc203f1b50358128cefd4154ea3857d9a1598cefaf1553a0697c973a9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEN961904280.