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 0x9114df160c386ebaea6e50fa59e7d671638603aeb89e87ef0900a55cbabc73fa. 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/382b179f-c60d-44bb-94dd-f57af99e7a4b.json and https://artists.proofprofile.net/proofs/artist/382b179f-c60d-44bb-94dd-f57af99e7a4b.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 0xfcb088046e8988c2e6418d95ac955846f966ddc78f4914cd2cf7852ef2c66589. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/JPJ592007620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672491fc11e9c67b7f6f6a4b92b16f0925093633e0562eb85f362c2a76f942c5. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JP92G2100127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a9925a4165d81cdde85e77fd0abc61cd73d0523b4499027364c7995fb7e387. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:39:08Z), 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/JP92G2100128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e911c66b9b4b93a3e7cb8ee162c5285c29aedf91b74dd1be87d42d821b3f4. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/JP92G2100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b69637013d308faf131db9cb6660ccdaca66e4e05b5b3343382cd7d4c098e8. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:10Z), 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/JPA302301013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098409830f4da98bca38d21b5cd02f05b99607833a7b91eef5c2f57fcd014eda. 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/JPA302301014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x971c0ef9788e1cd85f3cd2aa315aca2f21c2d28c4a16509910e6169c565b3baf. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/JPA302301015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895c96c0217e9f80f551180806f33a9753c2ef71470ede9b113e3a4be1714a9f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:18:00Z), 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/JPA302301016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f053e85aed8c56611f30bb664af029a693b4dfb569c97b8e37c9d60fbc5b3f5. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPA302301017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce103d48b3652b36b655dd271a141ceaa5c1ae6f3fc14d6e8c5579a29dd237d3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPA302301018.