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 0x0921d466d1a482be08d5a83dcb7a0fa82e01563f3cbda1237a7b0df1a4aebf14. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/219b1504-1951-44b1-90ab-4cc4a816f6ee.json and https://artists.proofprofile.net/proofs/artist/219b1504-1951-44b1-90ab-4cc4a816f6ee.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 0xd2d9ce95b770574dbec987266b76dae0f8c52c43be5624c0257029ac9aee5c91. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:46:36Z), 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/USUYG1098493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9665de3aa1b2d5330af5845031f1829385bc5c381ba3e23246983e553aebc6. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADL1899954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49142c35169bccf679c01a848717d7e707d80c75b70858f0a83d2fea497cafa. 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/USUYG1200375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf5983849b58668969f0c12a31273a4422fae400e4f76239e28525517a19d9ab. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCADY1816725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96db4b020db987349768c823c33f302bfb7c05032dc4c1463aebed6d8dae71d9. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCADY1816694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f06e52ceabb7e0dbb38fc68ed82e9407f8b499994e0c2232094f71d1a2181a2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAEA1817356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f74edfd406e658a31b27cac2f916264536d175309e2f998c04ab952da30967a. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAEF1909644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa829d1b6e6adc729e4bca91fd0193b8cac760b392d46a12a88ef424db296578e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:46Z), 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/TCAEF1939509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd176272eaa56c8cffc7a74181bcf5b01be3f891482222d3977bd5a4ef40aada. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEY2041490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67c00f96c2b7ad3c938ef6649ade731454da165b527011bbcfaa9b52dfe4708. 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/TCAFH2065113.