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 0x32ba661a8163653feda4086cadf627d3b6a0d075ac2c110b2a1fc0b61bf66e0b. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15a84715-671d-4b28-a40e-8c154122d6a8.json and https://artists.proofprofile.net/proofs/artist/15a84715-671d-4b28-a40e-8c154122d6a8.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 0xdb57f3a8659217ba2e1050a111c334a387cddabb666f8647b8c6e36ecf2b07bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FISRK2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ec48ffdd3605c2f560f71723bbda0fa926ff88fe05dd670367ccec2be89010. 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/FISRK2000021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47ac216c6203841e4545703c6498af5e3e37b2bd4236478b411312e15e5ccd0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FISRK2000023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07768e6af21b1b40e5345df9b71642e9490c4829f61461b97f7b889d02e616af. 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/FISRK2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cab1ae91e5ae7c0fd003c70da5be7ad09c91e6524ad0c9c4e2b2a81f2bc9577. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2000025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f56c207018fc132d7fab646a5cf4a1d69fc7c3364978c815c8746113da5bb1. 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/FISRK2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdcadde6c36381b285bbc3b67686d8fc023913804b0cf3a24faab916b644b42. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FISRK2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c80d6a2d5fceccb038cca4e0d1f02149d65cda4488ec9f37927788ed280cb6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FISRK2000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8b0643c6a29f529044306af648efcaa72ef513ccf2e735adcabab83d93a5c6. 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/FISRK2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b743b3f30c761351683b09002e933aae4c21a9b0fd82ba217a5fc5638e2c27a. 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/FISRK2000030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dc185bd5a16b38d3c2cc7fe16498c81497555e08693c08bdf8b589bdb3b4f2. 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/FISRK2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff5c96ef3397f5c4f21cc2474b696cb951d1d42daf0453b8ad2b79cbc7f3ed1. 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/FISRK2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4d45b9fb82aae76c66f610cb89d4c643eb23b2e72eae59e6f1c0f8ff1077bf. 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/FISRK2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753ecd9531bec51284224dfebf888e4587f452961956ae6c537998ffc59eff5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FISRK2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004fa1f91da82bdf081aa89e002b678354fb50b978e89ba7b5fa8ea2fc8314b9. 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/FISRK2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e26961b8ecdf6e506686d8b08917263358be4a67d216fdbf9bcbc9f52274647. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FISRK2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ff0c1eadee85c053478b301c476dc868fcf1c5c0f9883b54e09ce5c5bb3746. 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/FISRK2000038.