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 0x4990fba09e810dea51e840b4ed62cd4da22f5ad611b29c10679fd87bd04b5d1c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e965aad8-4a8f-4139-9a45-d54abf853226.json and https://artists.proofprofile.net/proofs/artist/e965aad8-4a8f-4139-9a45-d54abf853226.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 0x0bbeeab61cf4ae89e27472817bd9f2583350e050cd5a0d1a8b51a77694791972. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCJPE1634197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5285f230f91afc4c5a4d0a90954d5f22dbbe94b26ea276d783a426733542c3. 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/TCJPE1634182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbeeab61cf4ae89e27472817bd9f2583350e050cd5a0d1a8b51a77694791972. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:52:53Z), 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/TCJPE1634197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf61e17b2365d8134d66eaef24a4b0c18c15fa0c118dd763107c418383f0e7b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:47:08Z), 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/TCJPE1634208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f79cd4847df7030e9f0859e4db8c56f37cc3e39c80162352d4682884d82890. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPE1634551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5dfab3869b7fe35c7cf47183e9ae6d1624b160aa7148d7e87408fcbd89119. 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/TCJPE1634525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7238af5f81e014c85008bd9373f0241252953f320366f01ea1edb80a64a5054. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:04:58Z), 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/TCJPJ1986039.