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 0x4f51e47eef5f4895e2fc4a675e3027b1390b6d59f1141886592e845fdb48e0aa. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4bd6994d-8767-4129-8947-67ec01dbc6f6.json and https://artists.proofprofile.net/proofs/artist/4bd6994d-8767-4129-8947-67ec01dbc6f6.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 0xe48031f654c9dcd655c5b2466c0787f255b8bddf1b4f32cd729a2e7b80e05a9a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:37Z), 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/USMH92331955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca937bdb549fed4dc146bce825a740bea691387a9f65af67d08061e6c5ca533. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USMH92331956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5dbfb898407d2700b1ff8a546aa7625e6640d3d6c4a820720951a2923140e7b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USMH92331959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70128b97a267be2236a4d6c8d031a167f71fa15eae57a95033769bd64dfdc8c6. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/USCGH2398205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61191732aa1e017b337c86b6018cab46dcc839ffdaf632da4e430a25b8df5679. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USCGH2398211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1d51f852e9a4ff21bd9cf26cfe401f62dda545d934cecf8a35d4f7b4c8b961. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USCGH2398216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a652304e1626cc301a8803699a52e91e6f23c7a430eef38aaaf2b7d690ffbf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USCGH2398217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34313f1bba8de7eed24006e05b1790741e8ef84df11d44b9e56ae4dfceb209e5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-20T00:04:57Z), 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/USCGH2398221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262bc539837bef82b80e2ddbb4eb9fbf7a83d5e3a990f250750171e958d8e576. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGH2398231.