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 0x8b81810cee7eee01a9d62e4da97815b6377f732700d5ff14e1eb685f496005f3. 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/43c4cc37-4a3f-4340-ac7f-d29c1c30e55e.json and https://artists.proofprofile.net/proofs/artist/43c4cc37-4a3f-4340-ac7f-d29c1c30e55e.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 0x424a73c92ddfd91b8859f870231ab530866a0f036b368bd339a5d56b3171f290. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEE1968631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d1d727854f89af45b801294c91dcba35ff6f48fc3069600f87287b12a4f655. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAEE1968641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e580dd4c1da561fad5b6b60d957e6a695a9ae27228248e4d4646e08b8d497da. 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/TCAEE1968765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b8bd815b06c0c571baa4c891cb2e29f30d6a9843b4726764516102f2b7ef33. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:38:29Z), 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/TCAEE1968771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91035312f8d0cfd28d1743f93c14c962b021836dd4a04df01ba3fec599ac62cc. 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/US6PQ2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84bb74b4b101c86550032781cbb1387510f62c1931fdb11a9b4816a2f72f4d5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US6PQ2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a8a86814994c267993f8e65be38432a819bed15a540f4b909714280584532c. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/US6PQ2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96703984b3948a187ac512f121128fc9c5531621c41e247dba79bb027b337aa6. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:49:02Z), 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/US6PQ1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3a909862c93405f5f33b8ed460428fe92191549a902aa38448132665e6eaf0. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:51:42Z), 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/US6PQ1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1fe3250424ee4b3fb61adb47195c3dc24891f7edde6ab5658bbe5230ca928b. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/US6PQ1400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3efdabd4a4df7983a2d8e6111a9be57ad0dbed55d744799bd2cdac7aa595d025. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-02T22:12:38Z), 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/US6PQ1400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd3da8c7da456e1dd1b24b71b085fec17f707abf38dc4e9e1f3f1c3bea29320. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US6PQ1400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83df8a657141cb95121e794a9a2574cb8b885ba465a424fdae42ece3703bbcb9. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/US6PQ1400022.