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 0x071ff1bfbe313800cfecb4f13158f57af1581713a81246c814698b4569926db0. 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/d94b3efc-70d1-4c4a-b980-617cc35ff9c1.json and https://artists.proofprofile.net/proofs/artist/d94b3efc-70d1-4c4a-b980-617cc35ff9c1.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 0xafa1620d0940fd72d897fc826e4df8042e1d229d8c5531f28d814f80930597b6. 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/QM9AA1726566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb02eac80592cc1ca9648727da766eb5e2442e8df2ceb696eeebf960adec595b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM9AA1726567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fc20d048cf76986a92628c85b8ea9029bacaf4764d94e09d3e0ac2b1afd569. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QM9AA1726569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326451cfd5acc318b36621fe79c6920ee938ec4cee3d8d5e7790a102dab22585. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QM9AA1726572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75391f8399233066dbdea5e1495d575389eaf80afd62d4248d381b3ea9f50c0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM9AA1726575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b792688a9de76c4ff5cce3d5e224bf337fc9eb38386933f8141d9c138c9e76. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/US2761992656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd52f9e307bad19390fbc216d692aac25547b20d81b7558a77241ee7533f5dfa5. 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/US2761992663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34134168a6a470dd87d76d34091e3242965b059daf6b23014622c72bc02714f8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:31:33Z), 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/QZHN72058308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4349c73e6a1d1dae0bb7058a91538c4f1b22f019a087a993b17ed1f3f18386a9. 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/QZNWT2187133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0163907c52a95e97f34468b5bece0343c0b8970836e063f724db48fa82975c5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ62294379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17187126e89ff61bdb0795ed899f3a195b5c456ef65d38fd3c1962509a4d60b1. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:13:08Z), 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/USUYG1562299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8725808a876276f494f038d9f71c493e95ae928b9567ba1ea976fcdc1b39e5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USUYG1562304.