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 0x9bd7a438eef6880340ea89c287464de07c9814da2c79b2944ecc3132ae911ac4. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b63ac93c-289f-4cce-aab6-d2125d7624a8.json and https://artists.proofprofile.net/proofs/artist/b63ac93c-289f-4cce-aab6-d2125d7624a8.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 0xb253d83e153357bc1d604ea2600b2598b3f5dc675a1ae3d54f9e2a5c5812b814. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:49:53Z), 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/USHM82165065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86063e3b8efa926e728dcd5372afeb10f7da253f215a5b30e9264595e482baab. 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/USJE72419802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920a002fc7fbc7ab5ca41e3b253f56f80cc3620e5c450ad8618f10ece8a36c29. 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/USJE72419803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428d0ac33b3aee67ddff39148b4df7e9db554defdfa5bb6f06b035117f303a25. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:00:29Z), 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/USJE72419801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86063e3b8efa926e728dcd5372afeb10f7da253f215a5b30e9264595e482baab. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:46Z), 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/USJE72419802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920a002fc7fbc7ab5ca41e3b253f56f80cc3620e5c450ad8618f10ece8a36c29. 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/USJE72419803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa703ee1df8df1bddd7e4d1d83c20a6c9b07e3a6a6d821bf329c7b379d530758e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJE72419808.