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 0xbf61b87e6d8bc244f1f3763dc025642bab2a0de7eb987338d754079c43a077e4. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58c244f8-26f0-44c2-98e6-a4e2c6ed1d4a.json and https://artists.proofprofile.net/proofs/artist/58c244f8-26f0-44c2-98e6-a4e2c6ed1d4a.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 0x1f6a527b51a86f19cf798bbc1cbf27e86c202f5d59da672463f7751cbe6b9b3f. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:32:20Z), 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/GBLV62115873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17205d15386290a039072b94fea8073c1f9725422fa60e4eabdc5123bef6f638. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:04:34Z), 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/GBKQU2374820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696edb41a83656b9f0960566535447e92ac83dd2c78cb85925a16f09f873d70f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKQU2374821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95611f33eeb70ece4d4a0fdaaf21ea61321d87776688943bc1b947a631969bdb. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/UK74K1400787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1532327b74468bf444df565f2ef95dcb7d69a0cf34a4f81a1e9e5c6709707e01. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/UK74K1400789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca32055dad6f2a4fb3b224389f7ff9bfc9566a2831d71f429e98e8eeabd83c5. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GBKQU2458516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f97a98ea470e2674826965b03f30c5be9d2fc3b31e721329ed3ce2bacad6a16. 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/GBKQU2458517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefdd92971254b61135496a1a47d064e7b0ab75370dd182dfa16ec90b30a1456. 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/GBKQU2496709.