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 0xdfaf6ab0c15e7b5c180a7161c855ecdbeb982083347303eb406154dca4c98771. 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/3b835ded-bd04-4c85-9fee-9d1b495a9d81.json and https://artists.proofprofile.net/proofs/artist/3b835ded-bd04-4c85-9fee-9d1b495a9d81.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 0xcf36099b56c471563ce5b9bbb2ba62ab53305eb9b8ef81f19ee4ae6ea5b19a2b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/RUB731301731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ba79294ab743357212e3a283d3a1092c4b71e9aabf3dd6ebfea961cc09db0c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/RUB731301733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b595e36466d1a1e50591c3a10a20cc6da97f22684d4fab5b0ef99b714a47ad3. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/RUB731301735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53e80f01c6e5033ff345e6f9023f2fc3d652a25ea5b55f1fd0ac2930723a21d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/RUB731301736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4477dd5f94321700e2449555f89113908719e9f69db3c0e5a7e1f31b7b749a1f. 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/RUB731301738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713aaa75cbb58c641a264838001e2febbf5ee1a40e0e5d8e29337d31e7b84c81. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/RUB731301741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c9d30c5b0591b392d6fe9c392ef39b461442cc8f5bb7506137ab02fa12a291. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/RUB731518493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faa65ff2c6de48cdc541e00dfac53114e8e8eec3ddefd49bd2716254b793435. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/RUB731534547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4499ea311ff2b2922d01559c00459ddb0d415e9ab842b570aa1d70ff720cb2. 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/RUB731534553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91666b783343a30d92ea214943f79a5ca41097d113ffd390e5e58fb3aabdb4c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/RUB732013882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea73dbe7e4cd37fc5476615bcd19a2bbd2e9c27e57d74bf01187a767a03f1085. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/RUB732023749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2aefaa0fb48e43bce172d46788b761fde3279ff5022ef868cd8061e39e02b0a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZ5AB2439512.
И зажигаются огни (Песни Евгения Рощенкова и Татьяны Морозовой)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56223ed17b69d768df5922ab74ede80abf797cd225a5207b24aa75e01a4e1314. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/RUB732080010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61c6976e554c1106345d1451bc2acd51a6389cce6b6baeb8f48ecd72e7fb07c. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/RUB732500864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9628f4f4a8c25d6ad280140d7ee994b4177936bdede4ca7314dbe7490b90f75. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/RUB731301747.