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 0x4caf96f8ce56e55ef4c022b5597190ae7390393e1c2a9d6db5ff47f86dceaead. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed199328-0ada-45c5-b9fd-f97bfd98fc2c.json and https://artists.proofprofile.net/proofs/artist/ed199328-0ada-45c5-b9fd-f97bfd98fc2c.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 0x016255c1448de5e5dbf4a1a6d515b4bb9fc1ce19d956106cb05d36fdd42e5b0e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT62U2577612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded794c8c7a2fe93f2ef382880a0c4dc0af2b0c1afe5e175cbe0f99fc176317. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:22:54Z), 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/QT62U2577613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e1ae93cb433a9cc8bfdcfa74a00fa119947bb8852d5e32ba2a9776375062a0. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QT62U2577614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891122677d548aa9a368b6b50af89e44c56beb5863e5dbdaef8fc6ede3823894. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:04:21Z), 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/QT62U2577615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfb9882b84c92791c0716b6afde3ef1c2af19ec19e8e024f6dd847fb4b9d40d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:31Z), 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/QT62U2577616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd5d53a83f9904fbbc998d4441a08f0162357bfee1f2354363dd9ef7e0cf234. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T04:55:38Z), 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/QT62U2577617.