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 0xccdf37b732897949ecffcf324b47e999c64a4c3c94eebd6075bba4d31f8b700d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f938591d-7118-435b-9638-723f2a72870a.json and https://artists.proofprofile.net/proofs/artist/f938591d-7118-435b-9638-723f2a72870a.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 0x4d0827b8e93e4a9125143e6162a5c690041d3f3fca3e7a79e96e301086332f88. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:51:27Z), 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/ITD102400233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00fc8ec9db9a02da7473f8519dbc33a22817f1979b7d35e2ba094c4b430d390. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:11:14Z), 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/ITD102400234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb593394268773d7fd058873af5f5da43f16f0f3c1e68badcabbf54811310a23a. 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/ITD102400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5877e79b8578a2b480cf57abcf9b51b6ee414beb8c4e23e4aacc10db8960f2c0. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T13:02:50Z), 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/ITD102400237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3551d5fab024e6411178eaecc06c2fb318527d72fc16cfecf6f18e23d899ffb7. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ITM161001440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b562fab228b77d7f4649b44b17ef20cd6ac8da75db5211bbd2eca70d4ec2a0. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ITM161001450.