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 0xd2c9a5e66cf7ae98e7c3a29627a7d445a72df9712bc289bbb5b1f706939bd2ae. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2099b776-ee30-46aa-b870-151a97d1d602.json and https://artists.proofprofile.net/proofs/artist/2099b776-ee30-46aa-b870-151a97d1d602.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 0xb1625f616cd87b99d36154774539f9b81f95f4bb1e3a5812aca626cdadbd649f. 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/DEZC62407700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f304722e8d41e20ff48febe9296b9301175acb7f699b03615b1ef94ba09f71f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:25Z), 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/DEZC62407701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eb747813ba3e0d2bfa55e23ae04bc3407d8cdfe6156d7241f90640cc248288. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DEZC62407702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975682016eee08f657a8fe5bf1f5e6b94300251b6d068e900e894845fb09947b. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:43:50Z), 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/DEZC62411780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309b82964356653cd98770cab4c08d970829bd1069815fee2d18d590bdb81082. 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/DEZC62411781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7194d029e8df46379dd57740289643097c8688c7a72806ffb376ee134581c12. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/DEZC62411782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f25a485e916dcdd22223adbe1d510b83f3b0dca9b9bb9b458f640100f88b7cb. 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/DEZC62411783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6cbc9a9e1aca8744dcdffa764022ed322e542c66267a9d3f9cfab92e4ea56e. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/DEZC62411784.