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 0xd93a840d3bc5f666d226ca8a6e34d0d8d057155d6e440f0e68f5bf427961613b. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/062e4a98-29da-4fbf-be3e-8fa391bb7fc5.json and https://artists.proofprofile.net/proofs/artist/062e4a98-29da-4fbf-be3e-8fa391bb7fc5.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 0xaef733b7e84d216752a6e53e0078578b5229cb5341ab57b837f5c6e72ea2c04b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGLM2423382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18924934f5b87f3ab6159801e416ff6a5e4bfb5065bb7c83a3d49393bf874942. 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/QZTPX2435152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b8353f15556073828000c4274b9105bdbce2584b51ee5c187916b12cd1d4bf. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZTPX2448479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d8d056f93f2bd844f18ab55e2cd55cc21cb1fa78f2053b88ed39987c71380f. 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/QZTVM2430436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e86b29628d9458e35bebad0316345579e6318b905c582fd60d9bd9f935950bb. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:04:10Z), 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/QZMZ92588520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51497d099b4e62dd1742b4efba53531172aeea8f77fc8703e971bc7c19333d18. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:04Z), 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/QZNJX2595043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1639a37f80e9d9992a645b6943db4687d0cad1307c703a577000bc215eaefc22. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNJY2516692.