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 0xe47685bd709a20877fa8c0ab4dd8c8566effb8dcb078de2e6ab989a6d8dec8e3. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b80ff54-8fc4-4953-a64b-8f361398670b.json and https://artists.proofprofile.net/proofs/artist/8b80ff54-8fc4-4953-a64b-8f361398670b.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 0x4b4d177bc028d381a61fc89666450461916cf51d1eff69067c0295dc16c01c09. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/CAG320710378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d88fc6bbb711d61c74cecb2de4648571fb9bee1f1e32e0738d177c646b8aa56. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/CAG320710379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987ef11507d220ba593368ca6b0b64a3d6f8252a6ce7d844fd669704eb940dcc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:45:36Z), 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/CAG320710382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26388eff2ae8847c736812bcd3ac40ba02d63241bea89ab73dacc5ed0ac5d118. 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/CAG320710383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e3ebc90c7dd5a21b0f23f5f0fe88b8349740d63f79c0b2104e4f30219e1afb. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAS2527426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943952e2e84c633fff23b138875328388bb76f553256f441f0e2bf760e00c485. 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/QZTAS2527427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f800a42b89b3267ca7e4ba8582c1a0a123bc30bf258cf350e5f2b8b8c2362e. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:32:11Z), 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/QZTAS2527428.