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 0x3495847f5798c7f0ecfd746baa5dd70177a91d50b1f2c85f4f2f0b4d90762527. 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/debfa4c6-289e-4c34-81c5-9339ac04a8f8.json and https://artists.proofprofile.net/proofs/artist/debfa4c6-289e-4c34-81c5-9339ac04a8f8.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 0x81b900cafabef0d64da5e52fd2b09b4058e5100dde148eb909b80efe8bccc716. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:42:41Z), 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/SE5Q51819749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669d6642fa9dfc7fddbe40866aa5094f37e7e9392b8e8dfbe6df06f6dcf1666e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:16:41Z), 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/SE5Q51816360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9bfed9a20efec2a74a9b28aaf512c8ae9e73cf02f069566f54e1c8bcf6e15a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SE5Q51827124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af4592ec003c1b6d96b462bbf040d82e42ca7d5612f65a4a2a80d973eb4ef63. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5Q51825632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbc8df866ccf3dee11b12f08d2ee4b88bc75e4bb792f761f939a6cd5eadab9b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:22:24Z), 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/SE5Q51809157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41d220a6e3370186c07b73adfbaaf55c8136479c15e43f5103f311342b5cb9b. 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/SE5Q51803598.