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 0x55f9db0e79eb3a547df735afb5583eb97f90ac8127aa16310adf55e4a3de58fe. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bb1f6ea-588c-4e28-98f8-3a2f6dedd0fa.json and https://artists.proofprofile.net/proofs/artist/9bb1f6ea-588c-4e28-98f8-3a2f6dedd0fa.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 0x2066ecd28c3209ee032028987fa77ad7cfaa30c99a2631c35b33cfc15705fe5f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA112569180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b25460d71e54de67ecaa071e10a76e5b38caa4e189663742e3c0d0404ae6c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:10:35Z), 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/ESA112569247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f31c1e43374081c48eb43c696057f6ebca02278fa9f3e8a70f8a42cd2be25f. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:38:06Z), 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/ESA112571567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5165a4692d2b16eb45c75377db89eeb64cdb7e73bd6dbf755912cd2946b940. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:26:51Z), 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/ESA112571568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9142707caa831ae3cebcd4ec35281aeb83a5db5f66f15b50541966f772a07cb0. 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/ESA112573050.