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 0x8d7e22fe950fee81f471ac46d703c16962ec1198ed2ce220b0ca14331dd3ec02. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5f3dce43-7e3a-4ce3-8642-81c0c1ba261a.json and https://artists.proofprofile.net/proofs/artist/5f3dce43-7e3a-4ce3-8642-81c0c1ba261a.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 0x43411013582a91be406b32035d816a697905f1281e4679ce17b721c9d13c0b95. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:16:34Z), 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/CZA162453529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd393b565df0764cde3a26b791900777e692de7c5001dcf3c25dbe5daaf1343. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:36:51Z), 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/CZA162453530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d98715c4ca5d85832765b052af81c551480cf10cab3479ffcf83a871623ec8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZA162453531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1f47593c436bce8298d555de0e35bf32a88e69c3977d1e34d5f7aa4127c06f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/CZA162453533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42b1e9c03f0d78314f4ac5aae32c72eeec6195be82b4714e8a290a6d888444e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CZA162453534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x484d019805752c9a3d448d6230a9817be0589350e159dca5e2a3718de96885ae. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/CZA162453535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a794676578dd7344bee9124d4596f4f2bbd370bf9940b7c0fbfb96406b132c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CZA162453536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7818ca3bc7f0c06b18bebe740de21f33681b541c4200a14a970bfc391e1b27. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CZA162453537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7715cb526ed984e1116bc01e57c7281a92a7e10e2c381b16d4b05292cf304d. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:42:01Z), 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/CZA162453538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f88c64ab766d9542ec4c924a03ab54ab4daf9e8e9ea08ffd633d06545e4131. 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/CZA162453540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26d048319eee3cccccdcf111eb8bb0f6a8d63f3ea99ba78707287d03628d3d3. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/CZA162453541.