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 0xd5162f661bf790848d11ee63b0dec91dc2e0e62df8c1c21baf1e89391f669d8f. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e42eb123-bb50-4949-9ce8-e2e7ca364ba1.json and https://artists.proofprofile.net/proofs/artist/e42eb123-bb50-4949-9ce8-e2e7ca364ba1.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 0xfe8a466837f8ba224f17511c76b850b8ce57a564785cbe6647b94d4436fea753. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:51:28Z), 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/UKXN22593248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2427539380fa03a2fe17c7251e10d2afea2298330d7edc09d54a53a6398209eb. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:59:48Z), 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/UKXN22593249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc967b40df855971e26200c63f668c570fb48d9be733dcac9d545c38454b10d7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UKXN22593252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839cd0511618483caa826f8ca9ecfdfb4096ad55b190f549c726f5ab49eebeaa. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:08Z), 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/UKXN22593253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b01e1ae10be17f2b2794ab6e97e2c38a9c9e6df86b93a2e7f873b6abc52cab. 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/UKXN22593256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e5c00fc5d643503ae0d0beca7af0b6fdb83553cf94ae4d4ad9551ed88cc7e8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22593257.