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 0x96a9db3a6b972640a143c83240fe6d101e8eee440f253c6663df7a24d81eae3a. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e93e7271-be22-4148-b173-e770fd4e60dd.json and https://artists.proofprofile.net/proofs/artist/e93e7271-be22-4148-b173-e770fd4e60dd.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 0xaa1116d424523644b70ff7120aba168dae7ec04f9670923d6c720136dc433edb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/FRZ050500326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4e6c71999322952060197938d634556a0422b64afaa410aa5d9f3bb81ee173. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:17:47Z), 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/FRZ050500304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f6ef9268be1725ce532294ddd209c7f2d431c00ef443e6b46ad8d5a254994d. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:09:37Z), 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/FRZ050500327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973abd4019adff9ba7cef1446e10fd40d3f3300b526d37c066c621fe7d5d991e. 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/FRZ050500333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d41fdb436fdad4b56e9482865c1f67ac636f1af0284264a2d2e944019df955d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/FRZ050500336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddae63c808da2e31df3c44c0d08966309b48e4320ff47685e6ec0c163ee7fbc. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:52:08Z), 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/QZFZ62370310.