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 0x4f316dd2e81b04bb1f6df72fbc7161c8ef99a70fb53810a4852e477a044e7ea1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b7ed180-4960-4371-af3e-0e49584be4ab.json and https://artists.proofprofile.net/proofs/artist/0b7ed180-4960-4371-af3e-0e49584be4ab.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 0x144e87cea43bfe12293c89d5a47988c39f61737fed50c3a70d2718122a309c92. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM91962461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f553590faac2dbb71370b4053ef4fd9386a4291b7a6786cc89daeaf1488b15c. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USHM82055994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aacba7c7a285316b7ca71b3911e2af9a9e1abfefee76084ac4daa961d5a65a6. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM82055995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x293205910e8ac392ff72de3e098515985ae4d54b48fadfd26f99bcbb2f807020. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USHM82055997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a998ca1c5fcf5577ab68b9cc9d6789bfad342e020252254cda449b6f28ba0dc. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/USCGH2378238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da5f297d84ed34330d861a89d2b92a9b13a2a7ba90979c0081e6e8f6838238. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USCGH2378239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaaf29ff4533936db77243e3a53b24672d88d3b40f3c039c5f9a684f53341c5a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM92444651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76936651b0939537103d7e340bb89b55869b35d910ab4ff0097f6768b6404c38. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:53:54Z), 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/USHM92444652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4140d6ac0b819751b8b95f18016b89eb6fbe64177e97d5b7638421ede87c7492. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:05:24Z), 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/USHM92444653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765e9f4d8387d4428064fc84dc885f1f6c99efaf71c68197edd56f061db4d8e6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USHM92444654.