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 0xb9972ef0a742eb2f93e52c27ec7ebdb0e6929ac78e3d712cc0f10f34347fe1ac. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9106eaf6-cfb7-47e6-a269-3d884875c077.json and https://artists.proofprofile.net/proofs/artist/9106eaf6-cfb7-47e6-a269-3d884875c077.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 0xddfa435229be87dc9efb0b35f94cb5c738cb5e696d34170ab66516ee1b182974. 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/CA5KR2011767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b50d275c655bec81e56b42748cf3d397b0a1c3badf165d3a74bed8b51be893a. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:10:24Z), 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/QZTVM2394596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabef83c41b918e70a94d501a724d55d32d24a1108c090cd1ead4d1475fd1c78b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZW9K2409559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b7d0743ed3e068513e5d3786baf3cfe97a526152fd6bff070f5cf319ed315f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZW9M2432390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f58196ac378c46d430a90a126b23e6c78ea7aaa142e55f4fa4f1849774fbf4c. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZGLM2530479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db874bc11b1939437797b66086aab3d4c4898526934d8eeb2a1f09d24114a1d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZGLM2597956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c2e9bb5460fea3dcec2c494836c232c6ab544356f51594e68e301fde7e60da. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJY2575327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99787cef7d118060f348d8f833140fd3e50e5631374813aa71a95ec71670ef9e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZTPX2502019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e5ca8278cd104dd786f6418e04d577142f70645cdd7580b6f63b3ee1f1340c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2357360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea813e967dd06f3e3220f36c34287c9f93e3b4192d2ad32baabfa839b57f7ddf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USWL12401271.