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 0x4c7e0b750d3c771e0f1fd7ddc703dcd9dca366da916542babb244d0cead50ca7. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0da71bd-8e7a-4e85-8605-d9cad326d5dc.json and https://artists.proofprofile.net/proofs/artist/f0da71bd-8e7a-4e85-8605-d9cad326d5dc.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 0x57040c2cfe0e06fe29b74c605c913f9b5bee5880ff9fe8fc336987a49f81e354. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAX2217325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cef63fe85ba2db03d6515bb6663c95ffd0223cc9772b73fa9674e83e8904d56. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:25:59Z), 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/QZHN62273332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbd3b2abf037195b1fe8c6ed97a069539a9bcc233f59c6c6bc070cb71a612bc. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/QZHN62273326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98160b3ff462df1ff0f8b7bf6626b27ea36176b467acdfdc250a35c34a845a56. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN62273328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237a9c9bc2ca13a0bc41509ff940a142dd08f5fe50439812cb2f5fac532d68bd. 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/QZHN62273331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa446fd90f331f4592f091987b6ef4dfdcaf163c384d234ba7824da84ffd4b7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA72540367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb232e769d9326ba26aef032b3ca22d6670b25e4784bfb371950627d6a7714e5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:05:50Z), 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/QZTBD2508879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae96f0984c5d761bcc733c196da8369de2da82d4614dfbaa8b6b6a05b5a5707. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:58Z), 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/QZWFF2539427.