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 0xd3e9f614537aa7202318ececd38a7f5767a31bebf55e0ee79a96b4038745a344. 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/2cb1b63d-e81e-4a36-a16b-f2b8aece6025.json and https://artists.proofprofile.net/proofs/artist/2cb1b63d-e81e-4a36-a16b-f2b8aece6025.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 0x5a95474c15244d8b5f71eb367e7dbf5da06652f231fbe30378ec57649622d814. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:05:00Z), 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/USCGH2507999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06178abebaefb5705a84f27aa209fc23dc1eba9cd628a9eb514a65a589c5275. 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/USCGH2508000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21a42c49ffb7cddfcd20174c594b789ea86a0c1bdbfc1702704b9e7acad3a88. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:07:16Z), 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/USCGH2508002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4580f3dd0e15822f4b77b4d389b352f3ac6e2a681052c08e78a105c31ebc86b9. 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/USCGH2508004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf59a081b7547f1b353edb0b57a541f9b8319c45d90553f0f1cf13defd68c42c. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:46:38Z), 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/USCGH2508006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb309263862ce2b9c8f8e60e4b3e9bbc6e0c98bd8c51aa112007de51b0eac95. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T04:58:06Z), 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/USCGH2508007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984948250499308ec359ec03425ffae3516886e32e53a7e0457ea3da1784cac7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:04:53Z), 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/USHM22592760.