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 0x26bb253e2429fe13d435fc65ae6d31b0ee12f77d996d6f811b8342a649d91869. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bbcbb29-cb92-4292-a972-914895673320.json and https://artists.proofprofile.net/proofs/artist/0bbcbb29-cb92-4292-a972-914895673320.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 0xccba5cb04bfdcbeac8912b18724f60bfa706639e129685d947238487fe6eb89c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMA21220092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c6fa08de86d2becad798693dba8ca1c8c1e619e84627f588f008276ee58bbb. 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/CADE70902557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e115df9a019caf6d8abe8d7ba521f0e4955aefbf79709370258c1141e3f2a4. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:33:39Z), 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/CADE70902559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30114ab48b5aab1a9cc216e0cdf6d6cfdf69ce311ffde184049846538070df2d. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USAT21601926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30114ab48b5aab1a9cc216e0cdf6d6cfdf69ce311ffde184049846538070df2d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:56:27Z), 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/USAT21601926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73520bd217a3c13fc8bc2886f429389cdc91817968a96d6e87bada165633b120. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:48:18Z), 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/CADE71600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f5348b0b3440488fbb6553d01216586bf510fd1d29b0a5b2b8ef23250c0b7e. 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/CADE71600025.