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 0xa620c668b3924d7639f9d24cc1e85320aab5a49ac721f8675bbfb7bad7666d00. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d72709ff-d79a-4654-a1f4-f5ac0c8993cd.json and https://artists.proofprofile.net/proofs/artist/d72709ff-d79a-4654-a1f4-f5ac0c8993cd.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 0xbdebbb0698b2276350fa80ca89bb97e6bf8edba56ab916599387731fc9022470. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/COVM11618407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d72d267778acdd59a47bdbe11cb1aa10e95d45ab5ba90e3f7ebfb3cc85d0aeb. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/COVM11618408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a381cf288729555a7487958c4a87875d0f0c9b438bd08c6bf55be1e855d87e3. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:28:38Z), 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/COVM11618417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5f85dc1f0d90d4cd9272f71f5f03e072ed39654c3e1e3a94dce2586e76bb51. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:03:33Z), 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/COVM11618420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0105602aafb8878d409ba1da86947af7e40d822e3a32f3cb9c5c8e4a62e792. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/COVM11618424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aba3167b764922b403657cf6c15c287962235433c18566a327ccb547b90b17b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/COVM11624205.