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 0xa5746260d2cd32b67e435f1ae2b890046187bd21ccff3172199fdadb234f3947. 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/cff336e3-0abf-4750-bd4f-b35c76a171fb.json and https://artists.proofprofile.net/proofs/artist/cff336e3-0abf-4750-bd4f-b35c76a171fb.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 0x41ca60f3009ea98308a1b991ae7898528810ec5a5d1fd7371ff8212cbd9d4db6. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/ES5152100263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3aa8ea35de2a7c03b2f24a697be76c6b3514fe27bf479fa58a885208075c17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ES5152100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1d6f4de14138144586d1928fff103a9124b6ddb8eead7ac01b9d462c50263a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES5152100443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe924a3020de0a73d7cedf5d7c8228c2835d820977155d45a342a569a20b36c81. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ES5152101214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bac9213ae11dfad72cc0e13655939af7c86ea6324df993d96e9acb4bd142888. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5152200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe501faace8704c32e5520556afeba8251c19bb3833613a269cac9994702bf3ec. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES5152200439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44b1cd9017f75a7d93d8e10ba735e7ba5d40d84997cef713bce1e109c060c79. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ES5152200792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc12f64435a0439457af8f0011553eb6ccb425b770ce43606fff7ea31ffd06fe. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ES5152201564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810a1ff3a31555d2b65b96842027a8857768c9c42641b6db48cf02789bcb3abb. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:40Z), 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/QM4TW2306010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e65cfc87cbd6fa96992c20cd24f161cfbcf6108da544c652d5f00a2905b1c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZW9M2230610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e65cfc87cbd6fa96992c20cd24f161cfbcf6108da544c652d5f00a2905b1c0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZW9M2230610.