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 0x5ff0e785677834f57e21d16e98604f3b91f1b4da34c4a397adf072767331d7a1. 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/d35e34d6-cc5f-42af-860f-477ce8033f5d.json and https://artists.proofprofile.net/proofs/artist/d35e34d6-cc5f-42af-860f-477ce8033f5d.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 0xdc9f6c807f743eebd07734592520e15ab7b1270241574c6c68f18475c3fd24ee. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:56:30Z), 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/DEDE30805001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcc336d4a4dd5689f82e84db25e3d5c137a9bed0fc19bcd98fa8e004676a710. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEDE31067006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770002593e3cb8f50a5e85fe36d9ab5d223a92f9df80378ca47456e23965755d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEDE31067008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93c2c0ed1c7d36ae508a204d9281f20e32a09e8dac2e2acece2e9520cfa6505. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:20:14Z), 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/DEDE31718805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc622de495b2c71a2016d8248b504e04b30b859730fcb2613925de3970db5c3fa. 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/DEDE31718810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445bcfa0538961717ac1f184ed71accc65cbd3f809d90a641006daa462eaf4e7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEDE31921108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9846c835578d5ccc3a01b992f05f9ba0cf03769eca5d4889b0b26636cec49fc. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:54Z), 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/DEDE31921109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a827d29ad207771e2617f8f2a0dd52425a0ce2942d1e33c0a8cb28243145c4. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:11:05Z), 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/DEDE31921111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c52776f581cc1bdf3741fa89255ecb6ceb9c1d3bd686d7d704e1460dc95a92. 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/DEDE32421603.