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 0x8610366ebf41c59eeaa8e0e8eb72525cd9d62abd2726c6c596632b7389e3fa7b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58f82198-b1ab-4a93-b27a-2232200a2e80.json and https://artists.proofprofile.net/proofs/artist/58f82198-b1ab-4a93-b27a-2232200a2e80.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 0xc5dd328703bbb8b597acfac2962ed9a365115ff316113bd92bec34735c9c00e1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM90982898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856585aa19a0c13889ed2016d3678c17b4efc0118149f082feaf56029f7cdd03. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:55:46Z), 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/USHM90982901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df6e5a015d062516e6b18a6ceceabdd660d42aabc12705e3c47bbe35b4e75bb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM90982904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890a7a7fc3173ce5c1a17eb19c0accec79590c370d0f1d232c408d2443c5eb5f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USDY41566430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900a9039f12d48528b00eec735610da2d9759dce1904e77deb7b5c92b75bb532. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:24Z), 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/USDY41566436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c957b8eb4cf1ccf8532fe8127d46fd8050e63c31a61f67c0f45a9667059b18d. 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/USHM22578410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf25667f26ce910ca9fb9028552cfad1dd7b4cc36777e188bb860b35b479f9f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USL4R2504110.