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 0x0d07bf332eb75bf16f535309103329c63aae3ad9fc4257fe425c2622459f29d4. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e20ed1e-a55f-42dc-9311-9538eee169a7.json and https://artists.proofprofile.net/proofs/artist/7e20ed1e-a55f-42dc-9311-9538eee169a7.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 0x3b4282eceda165ebf3891109552c7d9a538d3d5463411aa6cb12895e5f2bb2b7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:24:17Z), 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/CLEA21900924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb7c58f60fda63db2af0a6cff2d94b37ce9e89779f73e99eb083cd0bc1e0a7c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:43:46Z), 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/CLEA21900928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc37bcb687229e7fd8d239d90620b6f4d7136fff37f5d8000c264ddcd3b9d25. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:00:47Z), 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/CLEA21900938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d1af232ca1ee9205e7e1b8f11fba327f690acdeb2fd3cd945cfea92b290d96. 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/CLEA21900939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040fbaa8042d8926e005e35dfdd0b82e520c52dbd401deec128af495462aed69. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/CLEA21900942.