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 0xf44dff8e23b481923deaa688c998d8be5f03d21d677f80af3634a4da71cfe65e. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5ba87c5-e994-4b9c-b585-d632ec11fb09.json and https://artists.proofprofile.net/proofs/artist/b5ba87c5-e994-4b9c-b585-d632ec11fb09.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 0x1cf4fe8132673b1764558291c8c381cb96e99614c55b8b2ac2ba510e8e32c9c9. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USCGJ1640646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4ac332fa81cd9632ec3ddb0f5ac01b1fb6758db53ac25edee84acf8710a508. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:10:46Z), 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/USHM21601416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edbf7bc829f7a394ba7263dc730d1d315ebe1ac24916852e0ba56d649fdb74c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USHM81624867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3e98066cca1416e070efe85655db63c8229986a79bf92e4dce8058cfc1a62e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM81705414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8572cc9208fcf4c1961925d152016412621066442d111a691385384e6045d26. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:11:00Z), 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/BXM9V2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a864fdcee6fd097bb7389adbdb55c42601300eab7c1fc681cbd355570c5aae. 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/BXM9V2100001.