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 0x47ede5c91d5019d96c211f7146d03213e58e8644b35abb21afd3f305db7dee82. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fcd763d7-6d55-451a-a6a1-4900f8ae482b.json and https://artists.proofprofile.net/proofs/artist/fcd763d7-6d55-451a-a6a1-4900f8ae482b.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 0xcf7617ca90f892844b63acf324f62ba67df2f33c72b8078c3212e26d38523215. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GXHAF2543421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d9ab499bd75a6608a52f3d5c98b0f78047ddab8531bea008ce4b3416b48189. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/GXHAF2543434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff29eb84c48cb79416992b1c3d33f32fcfe2f21e07a86f9bc9471337172d31d8. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHAF2553314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e39dd08236a091e6e452111ba8ec44d8dfba5efcb1012ae70cfde1877f43de. 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/GXHAF2542886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950b842445f0eea15fac7279625377866d7a8c04611cf36c9c2871d6f40789e4. 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/GXHAF2543436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc245c62b9ebf395c321c6a64d19cbdf67ac5aa40af5d9c5bffae6891cb59be89. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:42:27Z), 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/GXHAF2542838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cbeaf6252d7ee9d86a1f55aed644f175fc0139e4750b41cf542fbd41347b2e9. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GXHAF2543447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5dc907138a90c45e75ed1c323956e1756b3b052b2405ae40842d7da5cc53e0. 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/GXHAF2543459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcd3756c13a191d71b0c9dfc0f9dea772d4f67b187400d1295d06ee6c6cb918. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXHAF2543720.