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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f60d165ce05207c9365605af36130c343401bf8a70042f0e6ca1807464fb52e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7b3ef4f-bc8c-4987-93b5-abdab46647a6.json and https://artists.proofprofile.net/proofs/artist/d7b3ef4f-bc8c-4987-93b5-abdab46647a6.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12528f3af0480917f8cc21dd83673255c0e07a12aac5494dba04ac7157f0388d. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZFZ72104671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9781c82b1857c9db51fc484170b3016d8e4fbc7b76a48a1421e2f163a496b7d7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN82119589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694f2f59a1960acbd4bee6c1a2dfa61b7a3e3308246f915fca5a401d80a55ebd. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN82118398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea5799211528d22af1643f6188187dbd8534858e73f8326fac530c4770e38ae. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:09:10Z), 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/QZTAS2123869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96760c37adf12d58157c1f39cc6bc6771790129d1c4323162f51dd0cf247d9b2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN82177620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdab7ead94b8f89ffb41327c277c49ceed98cbf0bd93c2ffe70dac11a0a87a533. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:48:40Z), 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/QZMEN2115524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9170facc8c95d09627cc58e02c1a130ea61cfd29df91fa3c536a0a7ebaadd20. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZTAS2123870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35314295573d6f7377dc763492841ad3e5d49a682638a2b60215acac2ffce39d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ92299073.