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 0x878a2480b447a0d5fcdfdf31ec8bffac5cad947edf4318009f6112970fd41f9d. 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/d9a04518-c708-4206-8af2-d3826bce58c6.json and https://artists.proofprofile.net/proofs/artist/d9a04518-c708-4206-8af2-d3826bce58c6.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 0x1eaaf4893d12811de46ca5f95d1140601d83992bd9274a91c7d521bcc5ae01a4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RUA1H2072862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edd881cdbe0136c9ad77ee923e2fa75ebf3de3fad07d771d597e6b35d2873b2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKR6V2309805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f4068ac4c7f9db2d5bdae465a58a721d1974dcdef87266bc2d0c9f6eb557de. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/UKR6V2333359.
Романтика (OST "Согрей меня лучами летнего солнца")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c705199fa8f1c056cb832baf1df1c9efff6c8f07ca07da893c3ec32c5b6568. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GXBNP2488924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ac76794866839e6d1d4be98b4eaf59d795e0527e930ffef855509b94404048. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GXBNP2535568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf091b344e71b9b3b68e4dc4b67c8efb3da85f0f1f99c9701d9db3b8a5856deb5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GXBNP2560277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971aef1fd6897a82376f8e41fe6f87c5dfeba079bc14c1fdde2339bf4e92f713. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXBNP2570394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ade2bdd7575f797ce31e448646d33a41427172298e039b4ef991859ffcb6d9. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/GXBNP2570395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a7f4cb5235a4bb508eafdddd5d31de3830b7380ea456e7d2eb61f8eb8b63eb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GXBNP2570396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2191ed11ad65b858a4a6ab109956db3f7e9f909e271468382a0ccf87bba17a74. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/GXBNP2570397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ddf48a89d7295be329a98fd53ca506c8bdc0367153e3485bfde486762fd5ec. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GXBNP2570398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6d945b155ea3991695025439591bf7c4555a89b2ddbac134266592a43a001a. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/GXBNP2570399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85653488245a92d3c1579504d6ec99982486d5d813baadfd6917f24920a75cb8. 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/GXBNP2570400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6988c92ff8a09f00286bfa7090fd6f82ee594cb6430d348ad4e5d51f72ba1e7. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GXBNP2570401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c19528453fe66b827a27825c0928426ee687125e7395b4c78c47848cb5eb98. 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/GXBNP2578750.