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 0xdde1643e0186f0a531e05f1df78de0d2daabcc73345f54e061cd1badca52bbac. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83190f56-6477-4679-bdee-cb1fec662a64.json and https://artists.proofprofile.net/proofs/artist/83190f56-6477-4679-bdee-cb1fec662a64.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 0x5a4c4428d6c26dd466a82e5dd42050bf471e917b1dc5606d8f88468b6b9c3f0c. 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/GBWUL2556133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648f165991df9b414d59da0fe70389425054be0a7fd96899a4f3f67ba99e53f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:15Z), 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/GBWUL2556157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe686b2d5af3895bf16364d68fd7e3c1aa6ae1877175446499392131278651a48. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBWUL2556167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ff1832de98a756b22c24a4809e46aa1844c39daecf37cba1ffba05ff921eca. 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/GBWUL2571036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488b0760985c9a94ca92863d6567995d338c3fb99ceeffab9de8d85c87c9787e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBWUL2571028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2d18ffa9762188364eb9f2602cf4e1eedef4920bb941117ab56fd5a0c373e9. 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/GBWUL2571059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34c73c107f41ea0e1b6efe2e7515b77673ea409b1989d1c4ecc114cddb52c39. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZZ8A2528893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffdbd54a4278769c84e8c3bf65a4ee0640fa8d815ca2502ab526047c4f7f6cd. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZZ8A2528883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc501a3334fa17594c3777bebedc35981eb1f18589a497b3073889fe0a59652f4. 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/QZZ8A2528870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879459900c7fe9a576a5f5c28b8b3ea267c46854d906a627f5314b01c69c6d4e. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZZ8B2518934.