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 0x7281e52a1b6905acd18d47a432e386125f305ae45b5ab52a3e9d7b9a1f4bf136. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ccdf1af-ad80-4864-a8a9-7525e6007738.json and https://artists.proofprofile.net/proofs/artist/2ccdf1af-ad80-4864-a8a9-7525e6007738.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 0x51137803dd9279c5f910b5eb5f8e3bf40cc12de96a1b8a8d4c9cfc1476d0ef79. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBSMU7111661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd688e707760e65383dc0fdef3c6f80fbc4bf2be5b11731024d050d59f41708a5. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:03:58Z), 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/GBSMU7111663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4554a5a5c41c567c614ac5d29ef21fbfed5753617d13dd6bbba206c47d9b50a5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBSMU7111664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0cc817349ed2803294b7cf9332aa1f5f663556f0ec55bb4a6d86ee1dd14198. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GBSMU7111665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3004c42367a1bf47a63898f9b0fbcb992296314f715d7c278fb62247dba5180c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:04:05Z), 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/GBSMU7111666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff01231f7824d9f9954e2a127b7e5ad159c3d43b1453b0e183c692c29cb0df07. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:19Z), 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/GBSMU7111667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3484bb327c8190738d7e77e3bd524595f6eb5d1a6ecef30b6ca21143f30ea946. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:37:12Z), 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/GBSMU7111671.