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 0xd003e5295270205f5543d91d6f84559be2819fc580b68f3166f6e5a0d3fbc3e1. 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/9ed7d9ce-c421-4f56-a54a-d0f3ecd2cda1.json and https://artists.proofprofile.net/proofs/artist/9ed7d9ce-c421-4f56-a54a-d0f3ecd2cda1.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 0x5635a76a3d94dca5f16242020a8732c7557d8a72e5d0359f418a7d3533c7d0b9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:07:51Z), 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/DGA092310422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09dfa2654ec67abf48a7b25e77658358d32eef774e5ab51fed9c2a989985a0e. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:50:13Z), 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/FRX452281111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe704584338b1c89e028476ce7a59024764922abfe7ed9d68c29d01fe733f447b. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/FRX762338620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd71b7312f0038f690ea8c893365999e8a90fa36b7e76a6c936c4f9bab12ef6. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DGA0H2358969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655672a7c887077f195b4492285aac0db958dfe4622b30927787ace14d08efb2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DGA0L2302449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda689590928e075e202c54e111a2ebd04c677c457f04c6d5232b079c15e65b5. 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/FRX282593184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edcc3bf7939ca7c6f794cf8340a8d0a99adce24354a501033f9047f91a17250. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DGA052521970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2b58c79d4ceaae80f5895fb79de41e9050c1b2afb0a5c354d4c759b43fc317. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0H2464401.