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 0xfdf32137fdcea1f4184bf650adbdadba6a452e76ebc98f60bd1a4b8e75065b75. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e8bdcd1-a921-47fd-bcfa-d064bae38479.json and https://artists.proofprofile.net/proofs/artist/8e8bdcd1-a921-47fd-bcfa-d064bae38479.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 0x31c440a25ba55647a70b416c2d4a69b7974bc598338c1208926cdc157b95fb05. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMEP2062840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b5d3e7117358cb5be5a7077c73257f0f597c5c0948914cc21d3403f93b7178. 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/QZMEP2064109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449c64b99e5b0111bf860d5725bfa99b13ae4262d7c256639dccf653ddd49f61. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZMEP2064104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd17c679da628df39f96cd7047d2d5d727aafddec61fe469d3d00d63fc175ccf. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:43:20Z), 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/QZES62159951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935dc09e85adbda18e89ac872d4807c684d1ef28e567bd98fbb03f628d7a680a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAS2202104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a8e0bb7ddf1275f808d84efc2e9ecfc8a41ffb0cf38632defca3e5a171ecb5. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZTAS2202105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbd7506986bb103ebd1fce8a59b9415149a7577fb32382208a54235776f529a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:24:52Z), 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/QZK6N2524733.