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 0x020757780d86c4e309560e0c727a4cb38f589a3cb15c73455bcd229433550d25. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/581c52d9-7b9e-45cd-974a-72d15bfe68d1.json and https://artists.proofprofile.net/proofs/artist/581c52d9-7b9e-45cd-974a-72d15bfe68d1.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 0x0bcbba17a9745ace8e37ba55be35213bdb54e6d90cd83f7cbc7f0647259bc704. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFYX2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf466afca422d121d1808743f67e712eb755a42d6e6820ddcdfaa13b224ba2f73. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTB62437228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc83ff5df407193714a545cb446eaca61073a50efbaf418d1827c6cdd452d141. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:41:50Z), 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/QZFZ42507121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a390b9f3eb26afd5d8a552594be03c625d00b38b2f486bee97a57296a8beeb8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNWV2555397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11057d780b2875a4b1391ddbe9bd19f1280886572652b15c4a25dcf90bcd043f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-19T23:57:39Z), 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/QZNWV2555399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4d6753119bf2e28308f6de029675ec3bc077991a8c6c9ab48b269bf9143db4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWV2555403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd52a5f80aff55684265d301a7d59b6f6700581fb8518dadc2d00cecabea37d0. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWV2555404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef5b0d3672575de48ffb003ce52037c9a1e5a994c7bdb12ff9ad2b608854d14. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:38:41Z), 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/QZNWV2555406.