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 0x734bb49df94f05ee51f011bf7888fe548eb53ab03969df206f819bcb64fbbfd3. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff1d0823-801d-4f25-8f71-da46a8346a89.json and https://artists.proofprofile.net/proofs/artist/ff1d0823-801d-4f25-8f71-da46a8346a89.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 0x39de37f7d9e111f0c2b87d669a221035b6c394a2e5dcd5cb536b4c495ab236c8. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GX6EZ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5612cd74a11f77a078d4b09bf1bd1b68f47f4d4bbd1ba4b50b16ff427baab62e. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/GX6EZ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39de37f7d9e111f0c2b87d669a221035b6c394a2e5dcd5cb536b4c495ab236c8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GX6EZ2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5612cd74a11f77a078d4b09bf1bd1b68f47f4d4bbd1ba4b50b16ff427baab62e. Chain 2 (Bitcoin): anchored in block 957681 (2026-07-12T09:09:02Z), 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/GX6EZ2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5df8e77d928363fe376773428c2d81b76dabb7bd252923194ef2c02f88a8881. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GX6EZ2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89889276b390e40ce65f9b853e702cb3d248f5bafbd398a538119433967ffd5b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:03:50Z), 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/GX6EZ2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca83c272c1f457424a8513d5673e898acb1c2b60a1c1ee78df03093f286a3335. 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/GX6EZ2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66fd80fb09ea2b70414137dd50bd38017a99cebecf84a95a2f1bc1527795a1db. 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/GX6EZ2500008.