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 0x5b766d001c69f56b072a5d7189d3ecab3ba8d9675016538d6f768c10354d3f23. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/727f0c9c-1eba-4f92-a22a-33eb67cb6218.json and https://artists.proofprofile.net/proofs/artist/727f0c9c-1eba-4f92-a22a-33eb67cb6218.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 0xf913d403b7c8053a231bdd33bdba5ab0eb3feeca9a6c351d3b8e773ef11c7d1c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZMEM2326329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598e82adb10ade8008cf86d3e5002246c22039934b28b4a0571ec09bf744e837. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:10:18Z), 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/QMRTJ2300427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8dd83ef47f82883bf967dd95c43ea140a697044996afcfea2e55b93c0e5785. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:58:23Z), 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/QZMEP2314492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02acbf38fc2e8fe0a5b7353346350afcf6d460b401feab89c59f0be4a775412. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:43:03Z), 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/QZWFH2312049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823a19f58168c6d8c904dd16fd50371e63905e6fbbb98dd60dc2f5901ab94006. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWFH2370502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa39c8d49cc0014802771cfee998174147944b6ef04db61e6bea1fcc0c791de8. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZWFQ2388023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8efbb31063afa1b8d04069db89d45f1b436375867abbdc0baffb6e5488fe744. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6Q2455357.