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 0xeafc65d5b21462f18988f9b1fe417a39877c40df1e8201470fd4ffed8755b867. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3da6677-4edf-4711-a9e7-02c66884eb2f.json and https://artists.proofprofile.net/proofs/artist/c3da6677-4edf-4711-a9e7-02c66884eb2f.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 0x75fac7e317b95b78cbe93ac27b41cc890890d80ec81aa96fc63c07f570325e41. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USCGH2089399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951cd1346eed9f0f449a40daca831df4c8156612e3408719bed2612dff96e041. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH2089400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad69099e1a151d8754b3d5de1a7c0e53d7c3e8a44aabba13768ca05ee3b684a1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USCGH2089401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x055bc5b0cdae8b25d734cc090b74f85be06bafad156bd27b38ca993cb03e253e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGH2089402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8814dbd2fe7e98a98cd8bf8d18d7419af7a504b7e7cb9811dbf1da52561be5. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:05:53Z), 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/USCGH2089404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dff9a35430f211e88f67d13c923dc752c6b750cd040a77a0bcb480782d4976. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USCGH2089405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc82b30c230fcdd68778d3edecaa1450033905210880f8e37984b696fe1dfee. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:56Z), 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/USCGH2089406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d0273ff03b1b6a8a2e6a09b1518c057945b100b68438cc3021a45f776cc7f4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:45:51Z), 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/USCGH2089407.