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 0x02a488b700d8daa64daf7149a62c066e12ca2ca8d5c521eabbf886621eb38468. 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/ede38208-c26a-4f4a-acf6-6c31a43a73ca.json and https://artists.proofprofile.net/proofs/artist/ede38208-c26a-4f4a-acf6-6c31a43a73ca.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 0xa66776b0b5aeff70894940f92c37a167b20f26447bc3fde1810d2b0e26fa7943. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:53Z), 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/TCABX1411188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0968267baf441f61346b90bab4eaaf1fd513243bb8408872789282675c5121f4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCABX1411189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784ab1a95b758dfa90c39c2b0d74832b6730a90b42486f2d9bdc5780f3df895a. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:07:54Z), 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/TCABX1411191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3142b13ae50d65dce7b239f5f287f376bbffc838ac0d7dc6f2f8d059006e729. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABX1411194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x225a28b785fcdf4a777510f854fb61c845caf3e96812ada4e462e2363742b6a5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCABX1411195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1a04b3767da1199927331c65ef4599b491f42dd608aa67d6b80e817b630938. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCABX1411197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d44792d203b9bec74ebaaf63a21e7784f0d9cf98c6c74b99cf42cace96b06e. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCABX1411198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ed024a5cc4bdd22bf96117544d6d28bd6a81920ad04e1ad67ca8aa06349bd3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:53:09Z), 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/BEO491600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fb22135def60449b0a4d2927b2c8cc5c1db3ba58dd1133c2c7761a8a2afd96. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCADB1717407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c228926cc7cc18f4e43cbd2e63ddd261f594b6569976a1e51c8af99c0a62594. 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/TCADB1717408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7694e209eee9a503664b5023e0607c95c359d4666746a0ccff191799114bfde5. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCADB1717410.