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 0xa4fd3049697e7ea4f396a7bdade186f5bc688166be9a2349cc3068e98a80c8ef. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f356b815-6d19-40b0-9683-397559651904.json and https://artists.proofprofile.net/proofs/artist/f356b815-6d19-40b0-9683-397559651904.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 0x5886d68c6e0176fe39dbfed120b8802dbd51f584a0235fc1d6f456aa47e57ce1. Chain 2 (Bitcoin): anchored in block 957668 (2026-07-12T06:54:37Z), 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/GBSMU3056334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cca83b4d5d3b4898c3f905bb61895279f01e62a6013f6ab332d2f9edbc2f8b2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/GBSMU3056335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b53bcfa5ef21463dad5ca5edbc6ea6a3b1fd4cf810b578cfb3e924e9d15d82. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:10Z), 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/GBSMU3056338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48493137f9e4af69b460b185f487c78598d9be7cd8177db578b6c02069e1863e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:52:52Z), 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/GBSMU3056339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb90fca098d193bb39ca2c9142ce38c275b9f5bdaba1e065fb61b6710ebe146. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/GBSMU3056340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09eb14e97c653aa3b0f904c88eb48b8c40cb638d99d6fa103384eacdc20333b5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:42:34Z), 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/GBSMU4101295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b656bff6a9c4a574754b07f1b3e80e1efc89d608c710d7c92cfeafc268b1c9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBSMU4101298.