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 0x615052d4809285d7a2b3e325da3955d5390ebbb8464eef7b979646e3255a3342. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/faf0b505-f466-45c3-9046-69cc9a85df1f.json and https://artists.proofprofile.net/proofs/artist/faf0b505-f466-45c3-9046-69cc9a85df1f.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 0xd14ef08935b66f2da8e9f6ece7275cc837d8f6b9098d2da08b1eb5c0729a3967. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ZAURS2200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc3ed8530d7e6d262a2f73b593776a9a91268aac24124fbc6fe6ae3499baa80. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:59:21Z), 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/ZAURS2200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03badee8f2efffc85e0d589527e044dc1152bb1684a87414865039e00dce84ab. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/ZAURS2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x884ebb57ab9bd90bb9f0858c7f2d2aea2ab66941ee8e262fe391108eda7171a8. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/ZAURS2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5ebf44b0d758f5e0edd7dfc8215427405267155fd0bae727b6adccdb94bf8f. 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/ZAURS2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3487a3b35836e44ee8400b260e3e53ee70e1c3457e66f326a9962be454730672. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:07Z), 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/ZAURS2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e295da7108f407210d5e920d2ffcb055cd54c0fbf0d2257fdc361bd05b8324. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:35:59Z), 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/ZAURS2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb89fdf2dce35cb755553ef893c2020ee6d916f9b76df47bf0a5f9535fe19a4c0. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/ZAURS2200031.