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 0x85b67870e6f180e7a93047d68f09ccc864f44a8fd1c6ba6f1e3f7af7c9ef81e8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d59a4eb-4540-42c6-bb03-5c7559ba848d.json and https://artists.proofprofile.net/proofs/artist/6d59a4eb-4540-42c6-bb03-5c7559ba848d.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 0xb0ccae1773b3900445a7756fa3182bc4f408ad325cf3ed7c0161fd64d0a623cc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZXYG2503393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef06a239d8c1be33ccf73f32d7ba43c2b2bae9b37d6afb6521a537059a8beab. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:37:43Z), 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/QZXYG2503394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0b5ad15bb4c1c2e9dfcc7f063c2db0c24d93ef891d619c82b873282bf7ed9d. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:56Z), 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/QZXYG2503395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9afca5f803f74954d181cfd80dc2826a71a3eb370469df1ae04fbae152ebfee5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:19Z), 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/QZXYG2503396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf4b7b0c2d7282c47588c37df8b67a1fb026f6937dc72a111744cef3af953ca. 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/QZXYG2503397.