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 0x5cb47c5e179c9618fa213b55208c22dcecbafe2a601b3e06985c943110a21a91. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f9cd099-fcdf-4fcd-beb2-2ce507c681f8.json and https://artists.proofprofile.net/proofs/artist/9f9cd099-fcdf-4fcd-beb2-2ce507c681f8.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 0x12421e1ef0c3ed5ef5689d1a6b1b30091ca70455d2112701b1d60188fac3abbb. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZFYY2353062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d9451c622a549ed45430a6dee4a186b828b7654360e48524ea9216849c314a. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:19:02Z), 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/QZNWZ2292639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407b16a62725b2d2dbd86fc9493ff90fb3056d5d2a57998291d117f5acdae459. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZHNC2373378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56a9a08f5d336abe582ac77b0a66d0045e93698a03c11f5d36b279587b012db. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:18:27Z), 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/QZK6J2484643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974e4bf1587461b155d5c5ca472a606e86dc815c92b384c9887d85e82ec549ce. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:32:25Z), 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/QZHN82557339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd20b6f59bf53adbf361dadb2f4e4d87356a55920f41480226fd3b9825ed1b24. 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/QZNWW2552434.