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 0xc728db4593898660998016a75667b58de5bb80aa58a69fc75e6110829aa7a3f8. 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/8d564504-7a14-463a-8a80-1411d3cb2ac5.json and https://artists.proofprofile.net/proofs/artist/8d564504-7a14-463a-8a80-1411d3cb2ac5.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 0xd06f496a283ba5d794a2eeb456ef3407438b05dbd4dc4e42e63290bdd5bd6b6b. 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/LTC372000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb01e3be4baf0193c8a718da12620f631be3f91cb10c52d506c5c74c75eb96b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LTC371600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2a6ec4008f33112bb18dea484ca97fd2f0d14b3d033a61070f6997154d2d47. 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/LTC371900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6707b9acb775883ad637e1ae7764fdf493b87c9bcc52f015f99cdb47667a95c3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LTC371800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac6c087eaeceed010d6b9f664847c9a90137d53bed49989be430bef7d3409ac4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LTC371700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e485581248396638bc69ab253cc7614939dd00e7cd9970902d833050cb2d509. 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/LTC371800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef3868fad8d546308ce07dda51991eddf26f32d42d75be58f982ef1f9379da7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LTA691500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f8844260d6c7a15fa5c81be1f1adce515b774ce06c7a2631931e525bba71c5. 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/LTC370700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f8844260d6c7a15fa5c81be1f1adce515b774ce06c7a2631931e525bba71c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LTC370700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17c061e5b1d89277484f3cbb69651c7701647cf94bf0090dabbac27eaaa8ded. 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/LTC370500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a579a9f6e3ff349737e13e05ef02e7d81af927a9c617f5a66510fc6d5d0871. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LTC370000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1278ce8a7b501c937bdca17a03f3b92517f64f27246d67bc8700f75945f2b4. 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/LTC370400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44260c91546d0273b798adbde14dff44a41ab7e7be211927238928ae3f55683. 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/LTC370300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77c15708e447159cb058c8f70dc726dfc5ad8c98bdd20b24f666ab73e4ff686. 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/LTC370300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4baa71e88a2217d0c414ee5a89efc385553e61de6d02872f4adbec3a8f55da99. 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/LTC370300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x820ce12a2adc7f48f22eaa47a9372cff78fd91f026a170ce8c55a166988c0459. 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/LTC370200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x565cf1c59c8e4a19d691336b2279cb4dd741fc34ace7f3214323217e0c05f269. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/LTC370200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154251601608e830d34a3e9033d67ee4eb13c8df8646e5efd690337a9d301885. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LTC379900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028365f2e3fd8c56bc225755833c08bbf0962effcafe519b342e8b30b233508a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0Q2422758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba5f6fd453a56f62101e60a8f4c6f97f384d6034cc6ed68f7100bd06b3c45a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX872491964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685c32b6d3b0630ab395191d6d42051b602c6515ee32485dd94bc9a193c124f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X42481326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf197bd967cce797b062923cbe136fecfab5eae670581763a7f022ba76bfb8ee6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0L2370348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54479f89c3c246a7a169a7cd6576070f55bca63ff14e7ea1872a08f2218dca5f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA0M2360094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc269942a4fa320b4c1dd16f93e2f05559ebc79ff9e712a36afda614fe2bc4b2e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LTC372200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8f3fc4e507d44e436b8c657e45ed3bfdf9f59bd7acb5268ca1563b33352de7. 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/LTC372100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101a6473382b8b1d5620ebfa34e7fdac042481fdb61c3f3a5c805b7fffc902b9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/LTC372100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee9ea649108894c5f6180b0e00937be0507b229d57c9af132dffdf1bdf29992. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/LTC372000002.