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 0xc48c150656495eff37ec734017a9031a3a0181986189528f2da751672c9851b9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbfa8512-d3e9-4006-b47d-d0dc05a5a716.json and https://artists.proofprofile.net/proofs/artist/cbfa8512-d3e9-4006-b47d-d0dc05a5a716.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 0x6c87daad192e626105bdf27129c8f446a226ed6c08d482e090992c1e292db65e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCJPU2215900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd935344d633ec2e267235821cde75a29fb9d79dc4e68e44f89bd610793deaed2. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPU2216256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64625000492d502394131ecdf2ed49a784bfea2450f01e796124c47b5acc2c70. 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/TCJPY2339793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da5bfa0a0ea9d2ec15ba3d653d7e8830c9d25d89e4f9260aec183db81cb3fa7. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:27Z), 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/TCJPC2449681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c24179f2797f3eac645fa6edab9f05a8844d2d1c0c9bf3080ee0c811a1d3e6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCJPE2541619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x405f20df4a25f5314443cdd3a05624a05bd67334ee910d90274019508163ea55. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:20:22Z), 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/TCJPE2513515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf406ac11e7fd4a0a5093f7b8b98f132c98060d698f16fa7e530acd8c0bc19287. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCJPE2570495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692391272050f6246900d88a244e72a70f845d5424ecd4eec5306d72e2159370. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:10:31Z), 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/TCJPF2508141.