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 0xcff0f34081dd5d27f3bd6ed19d02964df1dab9795d21bfa979eb5b64e454a7aa. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24314513-f1aa-46d6-8d37-866b196cb7e2.json and https://artists.proofprofile.net/proofs/artist/24314513-f1aa-46d6-8d37-866b196cb7e2.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 0x3ffe47ee668d932fa7ad9b7097562740449dbe67b876f70715b45f2efc286206. 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/USHM92199068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1d72672da9ec1d9f57571d59ab1ff08f55bfd6884c4cf9ef9871b32a68344d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:38:04Z), 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/USDY42294512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f5802a7b5376f421bfbd2453ef15ff930fec26cd4ab71700e19d127a87a44b. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:18:47Z), 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/USA2P2313643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e26c9d562526f06aecd2e960601f6d78f1515af7764fe1e2385b62f6d326827. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA2P2429253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126b4dc9128441846fb7d3036038deeb55a4f50f1d354f2ac6aecd49eefdcb33. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:14:50Z), 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/USA2P2468242.