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 0x1886a31bc9308b35c5ab8515f8dca82c218b50a36d7e4989ed413fd5fbef0514. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/559e90d0-41e3-4231-aedc-239637549b6a.json and https://artists.proofprofile.net/proofs/artist/559e90d0-41e3-4231-aedc-239637549b6a.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 0x74434375e463c8b74e0a2de834fbf8839cb828729022f375c811ef1b817e9981. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:03:37Z), 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/KRA341404906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fea8c9fc02dc54f07f8118a1310250191094a90d2adb9ca820b30aa4882626. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/KRZ292084174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7deafbbd2f9af7610cfa40ea1ef88e4a551b4ab919c21058fe8ceabfc32545d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/KSA012283082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8feece817b6a2325ac935e9709ccbbc4e5b8bc12b88f40e3f1cee593e029b2f. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/KSA012283083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b86d2ce3ba150cc081a9a09b07e28bbd1eae8bf051495208c6457425829c96. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:03:41Z), 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/KSA012283084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cf8f2bdd263e31d4477ae1f1d33cedbb392fbc3e3f39eefd679ec8201a7805. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/KSA012283085.