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 0xc8d30e41dcbbeb6eecb716fbbcf54d66cc0964912639ec24568c366ddefeaf18. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5598210-dfa7-4b91-b593-0d5ad329cb2e.json and https://artists.proofprofile.net/proofs/artist/b5598210-dfa7-4b91-b593-0d5ad329cb2e.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 0xc388fb9713a9aa9b356163f8a3ac843021a1017eda4c4cd9c9b3102c58026ed1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJV2344501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7f4ad6d10934f090c3edcadf9fa5c2c64cc83ab793f0cc802e9508595f0342. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BKN2V2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e11d4cff63991bcc95dddae21c78307bde624468c9233b8fe2401cf0d39d6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKN2V2400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7f4ad6d10934f090c3edcadf9fa5c2c64cc83ab793f0cc802e9508595f0342. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/BKN2V2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c161fbc7c90e979922e41f5f076cdacd875212e88d98d2a8a8c2bbc41d13d2b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:00:17Z), 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/BKN2V2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b51b79926980c070d3be8104e569126dc7f50264a2698e4230cf21e4a6d1f9a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BKN2V2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a04cdc0f2a7cdf5b5b83cdee8fe5bc262693b492a2e919c6ed56e7890069b7. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/BKN2V2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45b0bfee81ea75bba39838b1dd4ff44dcad8d0126a1fd3c0b47555016b2e3e2. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/BKN2V2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bd5cd6e1af029f415b570653112035437a830386da0e322cf1a1bace648e5f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/BKN2V2500077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12b718301b58be8cd1682718b0c3a544e4dd986329c8c353d4b0728077fc876. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BKN2V2500151.