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 0x17e341f041c2a62696cf8731b827c964a5a8e7e2ca8e2835c43b66c12392e1bb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c19a1c27-6777-4207-925a-8e64e5d19e3d.json and https://artists.proofprofile.net/proofs/artist/c19a1c27-6777-4207-925a-8e64e5d19e3d.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 0x3cc67c7978eb7d75c595dca53370b07289bf3c95a198f256651c69ae4ea9a0c7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CADWP1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fdbf08a4805063f5d33636a156cdd6effb05a4d842b51d4530b17c696ffb5d. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/CADWP1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9358735bb471c3a57a9516844351ed39affd9de779d2f6dfecfcd664f63b8f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:23:30Z), 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/CADWP1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x902095d872faec21bf19b839f315e2ab40fab0064f20110f1a00d8d40aef24ee. 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/CADWP1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918cabb5e1a27f21a0fc147dce15bfbb137b5635a69bdd83f442d69993659ec3. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:24Z), 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/CADWP1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bbc65d618e0d17d67df5fa5ed8d4b8746dd7710d5a6334d4976303664736d0. 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/CADWP1700011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436c059d5f287c5d7845885d8e6c1cc89f55d70e755bf122d6ba54b9912a51ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CADWP1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56afd47e24a731a55dd8de1bf46f98853322762b116bb7bddcf424eb8da2237f. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/QZNB82254145.