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 0xfb99df76497966e1499b3d1090e81d20bf2301b8a437b1fb403e101b936d1d3c. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3790e4a4-114e-4d08-949e-af88699c1014.json and https://artists.proofprofile.net/proofs/artist/3790e4a4-114e-4d08-949e-af88699c1014.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 0x64b9254ad692c3056b31fb4e1e2a2ca170f6e124c569c291393b77fde4c072ca. 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/QZFZ22219410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa402816193ddbd59cbca35d4f32b311ba4c5213438b992c767db617e0348ec11. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMER2215112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1bdd786b8928ea7e6ae9ac712c10e449b710bbcdac4da2cdfd68640e71e0f6. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZNWV2392651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658d47d2ce7cf0d99c6a618ab90c52519e270698c9994a8135b26b3744fbfd10. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA52423754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb9af4f5ad0b3a6f740e9ea3f9d0d739c8f02602bd404ea1d4397f16b609412. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:32:42Z), 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/QZES82500739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9896f41dc5e96d83064aac831ac4b4030ae995491da79400608efedfeb3be30d. 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/QZHN42533857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892734539a8b736b9f76d284d7106ec7b8ba426f9e6abd2b2fb00b29cc965366. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:34Z), 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/QT6E92573725.