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 0xc60ea861cd5682112c9d006e89b75e2c84027ef71979b88ef22c948ea6fd85e1. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f7553bec-df1c-4cb4-a51c-80b6851d346f.json and https://artists.proofprofile.net/proofs/artist/f7553bec-df1c-4cb4-a51c-80b6851d346f.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 0x8e7f47a168daee6133c3334c396e8b7260a6bc1ef8eb283c70e1183903f75f18. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:01:23Z), 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/QZJG51943677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6966bf2ce8b18bf7cb67da87aa6464bdc46c0c5f29f4f77621487ea5673e3d66. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USLZJ2169432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76dac2ae213da731751e209c1281c6999ef857703e2336606815d10ecfba34ce. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USLZJ2293418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x992d67c979483552c11c10e1e7683ada6f06bf8b109ee23fe5923c10fbd896cf. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:30:34Z), 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/GBRKQ2429089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6797c594aa2c76b1e2c6984d0c9bb169437bc73b1cf104e2c8a042b511068851. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:51:32Z), 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/QZTV32415639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fac25d7be1b1e2c901d5c0d43ce836b184cd8ae9a7cfad3da0c0baaa4e8e0d. 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/QZTV32415642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee253a70b07bb3f6b6be01e21a5636027bbee8205f313981bbd85c6e6f2b1076. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZZ8A2487244.