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 0x8d4a54dc319a6d34a5db22d525a5677ba5642e2fbb4c8efec157be71d6a90c9d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/868446f9-b793-4a6c-836d-34372a0b1f23.json and https://artists.proofprofile.net/proofs/artist/868446f9-b793-4a6c-836d-34372a0b1f23.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 0xf04e6c0abccc50e6967e580360c72bccca8478961c2f3b20b1eb983968529b21. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USE830975401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe980a8ef97302587f09c9e0490dfa93506f605af546929ce06060b8d3f4e07d3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USE830986688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f90767b2d42100174fc29a37d1692d499926523061d93154499b580d4825a69. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:27:12Z), 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/FR10S2276782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bbf026aabf6f106c3edb2d4b02136ee965953f107df62878fa7d5eb85ae7bc. 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/FRX762163750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x731d525b2b1a64ff8ed74737b86b3857e045ff1d69750f7ba39d4d70509d4b7a. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/FRX872120553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a09664ed57000defe5532a54205b7554dcac1666ee3eb5d99af5b72627c2a5b. 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/ROROT2302416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656de554d8c7b81446c0839041fd51bbf09c1bb8dd0aa9053a121d8ab64c6661. 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/FR96X2556415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf348f8ab7d50135ac5deb1184e3deb7c93bd73a23883130e0165f07db001c1ad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ROROT2405540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d15d19cd0e328b5aff9ea73f62e6c9b575c225119246e26e8b77d93f39e1ca0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FRX762521503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a41e4a7c3b21d112114bec5b110153eaf821960c9377c7ee6e2c11c8b3cb566. 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/FRX762579153.