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 0xa1f37f989a5471aeb85bef3ed0d0fab4b71e5ec5d10384bdc4cd185e08c7c613. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47182f1a-a3b6-455e-b21c-32b96b0dae25.json and https://artists.proofprofile.net/proofs/artist/47182f1a-a3b6-455e-b21c-32b96b0dae25.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 0xd9ac7919e43942e641f18308c4bc750f1e9e3d51446bc4f3de9ceff20907370b. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GXBAV2197414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe420965a6e578a75227a1f49f2e87380683e97ef7cf4328a965018668dd10af0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXBAV2112595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a64c14c10a55a2bd26279edfec4a007d4240f39b06aa5c7ed7f0682402a7963. 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/GXBAV2188668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd906b1f4d0e0ad72079816ad415e915ec5e1710da09d7f190c4c3c66ccd58ca3. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:27:29Z), 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/GXBAV2143119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963f8da4be8c13434b388db89de291c7b911186c72a58aa333d6208227094a47. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:41:19Z), 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/GXBAV2175862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876b914984dacce4c55307fb1be635876cf5307d1b62749b7348c7574682c9e8. 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/GXBAV2137710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e1f4e9e2e4d8682a16c0efd24ef3a1c6abd8fd7874868e8da57f23d70b6474. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:06:25Z), 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/GXBAV2134464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf298c2ab206c3390bea12f2c62e7ea6142c10eadfeef52cbbd6ffc4739e070b. 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/GXBAV2169774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c900267b1f5ceb0475cd3eb56b5bb9967aad70042b09f364a44b9a9fe32118. 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/GXBAV2169438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6700820399c29a9ba5b59bc88994d4fbabe604bb3679ab08be8eff3347373e98. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GXBAV2102999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7b22220a04916f59b2146335eb6b5366fbaa807a6b57c600c34631cc4e1d34. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GXBAV2120700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a4744e33249c059b352beee615e4764103a2501233211dcb33fc1c35284ac8. 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/GXBAV2102734.