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 0x2fd9d1827dafbd975896f539561d0dc3d16387bc38665200617beeee7d0154bf. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1ae615b-d713-4db6-b620-81a5d688a39e.json and https://artists.proofprofile.net/proofs/artist/f1ae615b-d713-4db6-b620-81a5d688a39e.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 0x2d57f68cf3972c644daafeb78741559bb380c8ed5a4659e75e30dd272ec8da77. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USCGH2211568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b06916f14873d3237cd2e9fdbe1d30d2bbf7b88a576bc271b410f7b13220206. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USCGH2211569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de0e76c9dae3225dbc26b6ae768639e9ea103f25954153b8b6b7c736e2ed742. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USCGH2211570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09bf4e1fd3ebd07920a190c549cfcc109b91608c04d23649a17f67d7e21c9de2. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:28:57Z), 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/USCGH2211571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99a0e498c2ae044bd31f5e767f7ce2b992f5df7cc5dba6cac6a75bca480068d. 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/USCGH2211573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7db96b5fdfba58c8847f176d801212500f71217d0dd5e4d2675367492d5b40. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:18:08Z), 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/USCGH2211575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd8a2ad3e88fe6984bb2b98bb2e578cb7ccd6bf06b8a13ea0449c5519879106. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PT0LW1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90802dda0f62ca807f51092ef6d718fd11681904e2586b7eae9cf920beda4b99. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:54:30Z), 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/PT0LW1500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d13caf3d55680ee8f7e8e856b7d76f0cf8721ae1749badb30a196647bc360a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:43:09Z), 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/PT0LW1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56520177c88f9a1853480771a8c22bf3eaf26b792c49253027a4d4c2fe2ca114. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:54:04Z), 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/PT0LW1500016.