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 0x060b3b82631173f7c621a5b8c3981812d8ff127b914f573b9c9bfc56ef8a8079. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2dc48c45-7e11-4b5b-9ab8-e15ac95a24a8.json and https://artists.proofprofile.net/proofs/artist/2dc48c45-7e11-4b5b-9ab8-e15ac95a24a8.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 0xf09ab56066a33e26dbf38a94e8ff9a2c190438975dc2de706407e90e02d23e53. 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/US3DF1831928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb971e35d263b206456c6fbde64edfcaed5c29e97c389c076f7d8877eb6c7b59d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:12:03Z), 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/US3DF1831931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d85875ab952b6d895dec3428f19ab59bb176df4480b405831b62235780f6f6. 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/US3DF1831934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8e3ef09f09628aff3570010cdde412f9b9939f921e3b296b33dc92bb61131f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/US3DF1831935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b921043a8b34563d1cbbfbcb3ef20a31c267698e984276c66f4a63ab182ec4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US3DF1831936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a59836e0b08174ac718ee798367eb2580a89cde03382a77a917b175f401a346. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/US3DF1831937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb71ea693a9b5f45123acd04da1ab4c43e3d91523bf2508ac12732d263b80a3c. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:44:01Z), 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/US3DF1831938.