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 0x9bd2855052def8f660d95f5ee1a0febdcb93f1270c8912256af421fbb3dd71d4. 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/25b7a24d-a4c5-4a62-9a12-34235339a8c1.json and https://artists.proofprofile.net/proofs/artist/25b7a24d-a4c5-4a62-9a12-34235339a8c1.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 0x96eb776508c7d8a8774385dfc88400d27f74626e414a270f7f84887a1618b1a2. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:50:42Z), 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/GB8KE1858840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9def062a76787bf46782a50dfd51af1a4ec0b36f80e3dbf0447b8bcea785b64. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB8KE2206477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01184e14074131ee7e166ff800229cbb42a0ea554de20fccbdc25597ffda89d0. 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/GB8KE2324470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08c3f31d15d6a9214679aaccd45435a5a0c812ba4ddea4c67e5f8bb45b9e00b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GB8KE2407624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785955b443ee5690c18a41140418ef83aaeff89e99242a18784ca8f5d3ed0f05. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GB8KE2421093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ad284d59086a092b3512da925984bba254d42db0dfe55e5d6c47a1c1f3e17d. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/SGW502593901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096437c7b7af43718d4af6039fea718a4b7b1b39bdf8d8591591a7c878099f9d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:18:40Z), 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/SGW502546855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa60627d3ddf55da8f06b2c1db9a69a57dba2ec41a22f3f653681e2728ddba3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GB8KE2515797.