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 0xf3e2b2f358ff79c8e3e3260b783a83c11c4a7cbe56d6cb4655aa18645b72d8ec. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/38f4e58e-875b-4754-93f0-757dd3961a11.json and https://artists.proofprofile.net/proofs/artist/38f4e58e-875b-4754-93f0-757dd3961a11.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 0xf7c627cd086188e7a3da99e65d3f21cc9687f1b21d3febdcc5ee4151e529f6c0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/MZA021500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bae5b93d48ef71f4ba9b93a4607de8745e30395121cf8bffa0d5604bfa16a95. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:32Z), 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/QM4TX2212576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703936846b8a1598abdfad36111ab3ab743fc61724382ee68d84b987c038645f. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T11:42:08Z), 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/QM4TX2212577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f7d3790dd50d8600d8f170b33708141700ba606b32b94bc29a2bc58b178ee5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:03:22Z), 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/QM4TX2212578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9637fd46a1dbf0a58a75924c8258757d52aece44df352688f6266b13c7b86d. 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/IT8EI2200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9f7c086efecb5cf93ff3702ef86d84ec37175a05cac65bac4c24585f1b438a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ES71G2330723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d09aa3474bf86a6deeed767ce658c91a3df4f62efb1686a1a13f6995dcb4536. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRIDO2111521.