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 0xef8b1b97a54e73dfb08480ab10585b581a8bc79a2a11238a3b71414992014e5e. 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/481e1b01-1298-4bb7-a853-52b73ace6edf.json and https://artists.proofprofile.net/proofs/artist/481e1b01-1298-4bb7-a853-52b73ace6edf.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 0x46febeb3a80095e37f2985f9653ad7ebd72228909978c67d2174927cc7b65e2a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRE752100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca298eb355942db72f2d5de720913195d16fc01b4afa09adb0630e6dfc744f9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXOQM2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170569bcea2e88de35fee7b1551b8db4f7b3de138666a7b669bff387ed25d00d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:51:20Z), 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/BC0MF2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f32d7f6492b05a9d622d5721f19465df01b9b5e8e76606ee2559628327c0c9d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:02:09Z), 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/BC0MF2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6476753e7dc14c68f7f054a0f00908c361aa6dbafa09e30f59de45bce12d47f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BC0MF2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28deca3543591e7e6db1e5953d3e358a40f92da267d95aaa43d10a5923b48185. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BC0MF2200015.