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 0x05974b61c23b8e88e7c733946803f266b788268cf5aa7881981031aeaaf67d69. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92a8e41b-53de-4ebc-bd5a-70d06358572a.json and https://artists.proofprofile.net/proofs/artist/92a8e41b-53de-4ebc-bd5a-70d06358572a.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 0x1b507e653617ade251fb79bc9ba058607b940bb0ca45d1abedf24fb7e0262dac. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/BGA261302810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e8067a48bece9aa5b563df52321e96a0a873b71e421cb1165f62cdfd667ac7. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/BGA261302826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c80154b75c4889486dee7b75495179d908a37dda196bab7825b1f3520ea45f6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BAA052025182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa773f1d36ca27da80a82eadb91a5bd365c591ca29c754b17bed553ca9e2550df. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/RSA221811186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c619300801c4913cb34d748b7b8bbb73c96799ac94c36af7753687f7f42c57. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/RSA222190101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54e9a23f2bd352d62fa619734bede27ce58a046279a2dd053edb671fbbc57d0. 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/RSA222190103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cbcebcc3800a078a3318133781a98f3b6c003c76b13bae9e2acbfa0b5e72d43. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:10:50Z), 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/RSA222190107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe868ed14ef1be66acaa42f1c9ff8b5dc29a5d1e8f21b665efa2087f4ee424e9c. 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/DEKB72438680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddcf9cd50e3882aa90e6822f6e2e5976763caa90e8a3fc6dceb8703a6e5a4fc. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:39Z), 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/DEKB72438771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50af94e126c18173a60edadf2d150ebd6a922a147677f97f210bcdfb810806d6. 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/DEKB72438521.