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 0x28232cdd0dc2bc275f30db479dd5343d2379e971f573bffcf73ac1a2223715e9. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b00ee4af-b672-4424-97b8-a52c745e0151.json and https://artists.proofprofile.net/proofs/artist/b00ee4af-b672-4424-97b8-a52c745e0151.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 0xe82c6cadcd6b8405a61b59b47d52e019bc6c0ed2934b36689091bcf47ae5bfe3. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:03:59Z), 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/AUBEC2480613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4737f4a78506a9932a84d107e39467e1603c021262c2bc50ac6ac11a814f4eef. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:26Z), 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/AUBEC2361306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a59c7de3dab2449ce7ded0d551ac8a9966295e6edde63db433b57084a8f46ec. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:05Z), 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/AUBEC2361307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96580a297db551ad0fee29f76c866a1440a315b9b6277418d8f2fa85144aa23e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:26:04Z), 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/AUBEC2522761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2e643eafcc25301ffdeeeeeb6bdbdfb1bdeb57993d3f9794a68cf1866e9f8d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/AUBEC2540027.