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 0x84f4759b7c7bdd258e705cd8fbeda14aa12b3a967bba6760ddc3e55d3b11e23a. 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/f2af312e-4e78-4aca-bcd7-ee30145a27d1.json and https://artists.proofprofile.net/proofs/artist/f2af312e-4e78-4aca-bcd7-ee30145a27d1.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 0x397c87480507e5c4c839440b2b62026fbda1a415f9b32066e33cdc5dcbe14c88. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:45:37Z), 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/PL71C2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c441cbb1b1f6ced037a4e0b8a964d9054e63bb57f9993b6767ce9f4514a32cb. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/PL71C2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69762f91ff55f13c8e19f523ef4802ae1059cf15f557b3478afa8f321a350997. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/PLT251600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f90ac38ae08be332fd3cad9876c2cebb21c88030d3a6ca3f44da91c0487ff8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PLT251600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df83283c242b2162aecb941cb0291b0c1056ce98bf96c34cbef3b1e816ca6b0. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/PLT251600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f44410583d6f44614f52dd109929ae7a924c3ccb8445ced23c5fa4f2c960a5. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLT251600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ba2df193402ca9168c2d31ab4aff20a6d2d0681fb3ba5b401a56cc92b0c035. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/PLT251600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909c383470b2156e24b0d309e155579bc961991b8156619e068cb8547430d951. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/PLT251600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc21bfe8f7128d38b25ecdb6360c2b55028e54826b46867da46dbc6386bb3c71. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/PLT251600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960f69f5ca7c38cf6b2a1bc736155723c8e5ce155c457630a841495c5d07cb48. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PLT251600010.