LOMO () is a manufacturer of medical and motion-picture lenses and equipment based in St. Petersburg, Russia. The company was awarded three Order of Lenin decorations by the Soviet Union. Its Lomo LC
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 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 0xf2340e6d0fd78bf433e68bbd892ec1d8bab8ae898352545cf81610deb9b89e65. 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/723c472a-6931-4728-8d92-0b92055a978b.json and https://artists.proofprofile.net/proofs/artist/723c472a-6931-4728-8d92-0b92055a978b.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 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 0x3f174a9c704d5abf666204bf53f3d767257d486ebcb46b73ae83cfa51b5cdb16. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA011803855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c800c188ac7d7c8850d095474358587e71326d00fee3f8da5e3fa7477f1ef8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWU2088105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca089cb2224cf61a252dd7835edad3e9b5e7cd78b533efc8cc11fd86bedd565c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWU2088096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfd24c9d30a3e019c8e8c3e9dd035c7775a7db7150dd421a99b50ad7ea68dd5. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZNWU2088106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf153925b88890df8c231bff6aec0aafb5b5bcbeb4cced142a59633a19b3d44c7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZNWU2088107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55feea4af976114532d9efcea62aa55ea68fe7851dd9a6adad16b5ef608626b6. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZNWU2088113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea2a65b494eec4342e5a023de7cb946c05aa116e51c6d787a418f42cc48ce9c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZNWU2088114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b062f7c7dbb5571a8a5a3addb2cd13b82dc28f91b983195338b7462d0fde0c6. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZPLS2118513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d84426afcdea7207d76767da46f29cac22236e94f77b35ac19385cf4d6e4e03. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPLS2118514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbc54fbde4380a6ab6e4a1b34a884ccdf3a19aeb9f90c4302fa9a86c3a226ea. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZPLS2118515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce24672ad042142c7e7330c879a79a4cb8d1a6638ea78792304e4b99d67c118. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZPLS2118516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c8045ecf6a75abec2e7167f202239151ed1a25120fc9d0cf7a8c1b533e3e67. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZPLS2118517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfecec6807b4664f22ee3d577b96b8f66e3ebaa66a824f0bd2e304e95f1577adc. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZPLS2118519.