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 0x2450cadbc4131cbb5b33b73ea00503925065ef7141d969d26bf5107b49e5778c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b6b9127-4ff4-45f7-8dda-5013c0c4f060.json and https://artists.proofprofile.net/proofs/artist/3b6b9127-4ff4-45f7-8dda-5013c0c4f060.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 0xe56fb2a3517b70de08ec5433e718f2ed4d9064b6264a0aa62f8f5c1c471c0131. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:14:51Z), 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/ES71G2217545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92f51ed606dd1d4f32b24545fb104360b41e36fcd56fdd1406cab961aad3f8e8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ES71G2223882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098e4550b1073b73abc10c2979a1c86e4a844e374d2043f3f0df5dfbf172ed7a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES71G2223883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5790b902ce4afb9519a014d0388246165b12dd7eb6768cf2ba68ee02540089af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES71G2223884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d9967240487ceffb40d777a945bdca7a7733ca5387a2f9a031bcb56852e988. 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/ES71G2223885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf452b4bbe31cbed747422ce853f785b91a6b059efdf410ee4af725979aa669be. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ES71G2223889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa28b2e004c4864c349b0f1e9085acbe70195f2f96fecec50abfb1d7ff7fa353. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:38Z), 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/ES71G2223890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3ef111e271d7d7c95adc1e54202fc5488f687f2e77baa8a142df572febf1e0. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/ES71G2223891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d16b4816055780f750b5e3d3a081aa9814ade53b79790294203942fd6c014a. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ES71G2219923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eaec167b99c3462d9d6994e040557ec98d8304e469dc0febe9d1de3c227ab8c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES71G2219925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e26d0cc16aaa96b2785830eb54a04ae01d089bd4f2e0d532e0b0e2047bff04e. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/ES71G2214276.