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 0x89ca867c33705359f5ad1c04feadb1f79597d5186c5117e9e57cbf70232b14d0. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e075a185-1eee-481c-a067-e65cb162e231.json and https://artists.proofprofile.net/proofs/artist/e075a185-1eee-481c-a067-e65cb162e231.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 0x4e259ab47a7d1b9d3dbadd0dfbc2175d518b9d3a2b1099a3a7d38fe79adfee6a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6L2334417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e259ab47a7d1b9d3dbadd0dfbc2175d518b9d3a2b1099a3a7d38fe79adfee6a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZK6L2334417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce84fee1bc4d48f21e59ea93f451f9bdb3617840493227336713c2b16cffb920. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTAT2368089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f1e2a0a5401ed28a6ad46f6da310ef05e24441f38919ef450d6586275e71e2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:54:11Z), 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/QZTAT2368090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cd03ca8421f7c2195c9c6696d9e65b15daf36c13481d0b2e1f0d3a5dd00fb5. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:42Z), 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/QZTAT2368091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde282f8d1868fe9edad674b89a9fe515b81c14cf373340a20ddbb48e69bf5ccc. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZTB82591261.