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 0x8093d5a5ed8f076d1892cb8448574dc2a98d7fa1d48aa7c640f257a3abd7e596. 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/fc0b42d3-c125-42f5-ad5c-e2780bab522a.json and https://artists.proofprofile.net/proofs/artist/fc0b42d3-c125-42f5-ad5c-e2780bab522a.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 0x236d4404b78e158497cf06d9798e158ae521435a38feca25dc3a4dea5c2d71ef. 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/DEZC62329440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc9ad2552cf0418e81dd2bfcd7c367a2c788a60133371b30e9092975f82908c. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:09Z), 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/DEZC62330658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6c891d3187235fbfb4a6625002e9e9f424afb4d97a520e5b5cddf0421cd245. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:04:37Z), 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/DEZC62339968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7828c3b57652f8b0174a59180ef8547763170aa7480bf24a9244293b830507e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEZC62360138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f07d09c94231c1537f5f173e05f17964bf694334db382c2e53d6182529a13dc. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:53Z), 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/DEZC62333524.