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 0x043b3688d0d35b4ce9e5077791296dc174b0aebd2b433f20b5e50de876442d1a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f13d2eed-5a7d-4662-af3a-0fdb6372f874.json and https://artists.proofprofile.net/proofs/artist/f13d2eed-5a7d-4662-af3a-0fdb6372f874.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 0xfef5a56e82a829afa53ed6bd4d6d8a9c98b4b80be955b2b4e936ce2ecb0d2184. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:55:28Z), 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/USCGH2500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabdfd35f9371c1ceffcd111cc4f8cfb5b441691400d8c26b85dd71dff22d1958. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/USCGH2500215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0783cfd36fb90a3e2015b083f1a75ae4997c4d56691b97e75333e9fbfcf0ff. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T15:00:52Z), 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/USCGH2500217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728904ead3554cae7dc37094b1aa8e2591e6e65b47c80fcef59aac1d269228a3. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/USCGH2500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e06e293286274af110eae78e7b6e876ca04e68bf91223a776ef83f965eb4fb. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:20:41Z), 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/USCGH2555650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2112d3edca3e4e53276922309975783395e593a4cddd190375ee698f03c50e96. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USCGH2555651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229807c01f4485f05cce2d1334ac9d5e58bd16eef552f0313a26e12ae9f1c484. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USCGH2555652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d8882b400ae94154a80f02ce3a7d45e94f7d1291e97cf489ba644ad2b42cc. 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/USCGH2555654.