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 0xc48d6bc9e5dbb0e8e9707286fc4f2414ede68fe562a04602ae23d7030b10d6e2. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5a15624c-eff1-46b5-8142-a0d8650e009e.json and https://artists.proofprofile.net/proofs/artist/5a15624c-eff1-46b5-8142-a0d8650e009e.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 0x8d33d168aae0d9866744fef37e58c2150d4f3759962f4a05882a134025c614d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DGA062000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76ef848ac6e50e693ea9dcce788a42f68443f48dddb7dde24883b18c3ae6f91a. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/FRS182039551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9fed65585da19482cf0b088e16a750577b4a42fbf8a812cd8b09acddc5f33d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:05:40Z), 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/FR96X1521998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9081dd7141d79dafeaa55fa6972915b68f2b589e3f196539d3f7e431730479c2. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR96X1522001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15526253ec48bb258da473f002e836507a202c3e12c1002f7731fa760d0191ff. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/FRX201664867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160ad531efc268e88883cd1f1d5081054275bff73929d162d34fff4cb2b55f68. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX201664868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d0fa0f7b1e0e1ad70e280bffc666e77e74ceed3c7ba1f1234882dff76569a1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:42:56Z), 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/FRX201664869.