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 0x8d6438bd7034e542c4401f14add698889c9e98a4f9d6e59b4c335f2a952d0881. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dfbfc70-8d35-4dce-ae3e-c513478a554a.json and https://artists.proofprofile.net/proofs/artist/0dfbfc70-8d35-4dce-ae3e-c513478a554a.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 0x6db22c7c009d364af2d27467e2712d7c1f37f42abb2dbeea91243fbeaf4d95ee. 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/QZDA82021648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x938d7aca86683207f88eb70be857be5e78338eac6610107544713bae1a598ed6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:27:27Z), 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/QZK6Q2046469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312495f8ff90d656ce52d6219929da3e6d4d50f24e87330ee0232a8574dcc62e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6Q2028240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa515eac8c46b564c173584edd1afe0ebc73ceb91138120f029b187eae6354547. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6J2313655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753865193f8a29e440a543a75e10d576e24d591bd8e725115c8579accbff9092. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA52453194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9c0638130c31ea5eca82f2ac6bdcfd23daee19ad4d2ced431bda57a9d1ee86. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:51:42Z), 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/QZHN32417867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d049d2fce76526412cdcd0987f077bb8278577c53e984860b764f7eeff5bf4. 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/QZFYY2562274.