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 0xc45bd23d1b2788f1af2bb9b45cb7c276055ce0e04ed19f9d49fbe2ac8af10c60. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be7560a9-39a2-4a5a-b02f-ce7126080d1b.json and https://artists.proofprofile.net/proofs/artist/be7560a9-39a2-4a5a-b02f-ce7126080d1b.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 0x81315f2b8bac2606dc97dd687043f44c667dab096c848ecabe0e30f1c25f381e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTPX2125021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b570b127456c6aea3d0d83bc78456287d4249677ef02d8d1fcf00c4bd6ba6a6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USANG1906883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947bd4691b5ae50b4a4ce51e23a21cddb7c9b10848251086417f37bec6cadc08. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:07:32Z), 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/USANG1906884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50c61906d630e35334f819c57c647887f48724c9ae11396d4769871d1ecf0c2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USANG1906885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11daa735461363b8bc4301fb099c65eadd9dd2213dc6105be19928889724d809. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/USANG1906886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde4a64964b06c75e03c46c2c739ef827aa9755da91f8101df24a700423cae44. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:34:10Z), 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/USANG1906889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a91e6d29b86aaa356098ba5ee6cc9e3fa5463876dceb2a5a7d0a3966ee8bb51. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USANG2009503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6114e8496e14af219db9164ccf3e1b79beae7e6723aa45d4c6edfcd1dc20733. 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/USANG2009504.