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 0x0ecb2e87b9528246c4c21327e7a15b24b90274c0bf45e541e16d6c3c01532a6c. 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/c22fb0a9-cb08-4a61-a471-c9995e74c2e3.json and https://artists.proofprofile.net/proofs/artist/c22fb0a9-cb08-4a61-a471-c9995e74c2e3.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 0x79587c95d16ea4931ac3687cfcf27e30e41b39b40e9a2297685149991dee5991. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:14Z), 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/QZHNA2390478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaecfb8fb9412f1ffe34e034d81fa79388c056125e3a501035f7ebd2994ab40aa. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:57:51Z), 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/QZHNA2390479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f8cd8b7149438aa9a4a6eef554eca587192a28ae8708828d6e31d3da1eccc2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHNA2390482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3226c596fe4ace2bb321efe1dcb4a4ad0e4a6e6cf7c490bc2846891ffc472f0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNA2390484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e2b4b0bc591f578c406e83e3e089a4fa4fb062be31f6f0d1803c7241555645. 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/QZHNA2390485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e37300c1a49c03f038fc33f1be259ea22a3e350a16219d605ad1e1991efc3f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNA2390488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec50c1db541093d777fbe2a595da7331400cc0132aa698d4cfe3e4971f56b87. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHNB2482541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c936396ef5669081604961d4ef366ac42b527ac822287b473af4498b70aeab0. 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/QZNWV2534602.