thumb|Andrejs Osokins Andrejs Osokins is a Latvian pianist. He is laureate of several piano competitions, including the Arthur Rubinstein International Piano Master Competition in Tel Aviv, the Long-T
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 0xe622ee85e6795e12b72ebf2414fc9f32c624cf72a4ff5b668879fc54ea33bf66. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e7fdb65-f426-46bc-8210-00a13f3ce5fe.json and https://artists.proofprofile.net/proofs/artist/4e7fdb65-f426-46bc-8210-00a13f3ce5fe.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 0xd56c8966560dda47593fd26dd3e393b500bd532dd1ded8c11d0bdd2f08304c27. 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/QM4TW2250757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859b147a635b89b6ef4b6fb45bbcaca0ffc5282e2da3bad74fb651b961f4b416. 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/QM4TW2250761.
June: Shimmering Fields and an Awakening Heart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d684d9a5b19c7cdc6f794d8c8ff4a42fb8f1132e2bb9390ed81c48162909915. 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/QM4TW2250762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x081244a6f26bd8f05b0129d5c199a9ad7b1781ec36bbfe50287c1526392ed305. 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/QM4TW2250768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c34c10d9c5c9e63b0cb6cf07b7090f401e2131ab51d3d9cce44f5158dc5430d. 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/QM4TW2250758.
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 0xbd2afa235ba2c5530baad8e3997c5c215a9515ace322bec51fed263d14d1e25b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TW2250759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b2390450122180368089e8cb9e29436b0f570b137ff8cfd0ad0e50e7b5f7ef. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TW2250760.
August: The Sun Lays Down on Lavender Flowers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828f5e6ceee3d1ff00efa532139fe905461f8d2a16ae3f7dc4831739801a3842. 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/QM4TW2250764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb9d543320856c747b6c6a88ff846b7c0817b5fac3917ddfb1b621f3ef36f22. 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/QM4TW2250765.
Children's Corner, L. 113: VI. Golliwog's Cakewalk
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5e9562d851c83ea0e9a956ccb988439cfcfe0728e9a765021a52018a5c0449. 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/QZDSS1900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3a68552334ee2daccfa420a4d398072d7b1edb085e3c295b09400803ef2cdb. 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/QZDSS1900133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf199ff91b3097c6db41c75f0d3843c0daee37685dcd9d6e82d98009095f23edf. 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/QZDSS1900138.
Préludes / Book 1, L. 117: VIII. La Fille Aux Cheveux Du Lin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b8587a34c1b9aa50f69ae6b041c326a8a812d922b2ecbf1e8af2c1cf2294f2. 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/QZDSS1900141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eba29b3316a93777e1c772b77eac72050df40603ecc7f1f7a4c3507f98e5590. 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/QZDSS1900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5a07ab3e898c78e0cf866321d39e47c2bf0cd688cb7b499c4c725a4d8cf820. 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/QZDSS1900130.
Suite bergamasque, L. 75: III. Clair de lune
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae294e70df7909e842d231707ccc27f3ccee55c514e75a30ee9621b76aec3ee6. 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/QZDSS1900150.
The Three Osokins in Latvian Piano Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b61123efaa76ace4b7fb0b01a887158c49ff5a6294ad27bdd3cc16c435f239. 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/LVL151707434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c6b930bc06bfcfc91de0e3a68e05c00fc7aa726abb376178394ca6773818b7. 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/QM4TX2329397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743523eb3350bdc855295ac23fcd9deeb98c3180f91e20e47c738bc291296fc0. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QM4TX2329399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dd9b1614b6307be38bd72c1d4f5c0b0fd9a5f64ac50695a9bc45bec3fc1913. 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/QM4TX2329400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4ba6e5a981bc3a690f35dd26d795a34136ff38d2f22c8458fab504a8ffe3ff. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/QM4TX2329402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a3709189011f4d6582baa9f241093a11fa0f528bf64e67a9e96ef1ec693b5b. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX2329407.