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 0x92e42c9694c6fb53820a52908cde00a860371bef4594ec6c7f91aa4e57dfd885. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/925be175-1cd6-488a-a1ef-cd1f4b11721d.json and https://artists.proofprofile.net/proofs/artist/925be175-1cd6-488a-a1ef-cd1f4b11721d.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 0x477729054321ff9f7d5276d8047984750bcf6293f0eca07149cd462b19f85306. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:19:23Z), 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/UKCVA1603031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022017d31a4b95e8b483e1ba656fe452b5533f1ee8e516e2689b75ad50273593. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/UKCVA1603033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bc26fabd6f2e69fac29064d3994b02c0fed19a8bdfd2346223a656f4384837. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/UKCVA1603034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577a3d854df7805a0c99b679d4f35e02bc28f342572962fc8cf8edc9b485e300. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UKCVA1603035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8665a8d009e1d81e5addff6cd970e58c74819a013cb725c1b734da73b94802cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKCVA1603037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633c7310d5326117c8cb76b5ef46998dbda9519337b8c4082ef8a85b3a7903ac. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/UKCVA1603041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb89e312ce93cfd411a0e613a2ff5ef083b19da25746766ddbf151bfe620547a. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/UKCVA1603042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ae8ce411afa68d382ae0e03b47bf54c0e68cd2a3d944505fb845274841557f. 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/UKCVA1603043.