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 0xc5a9d82169f7ce28d036950afdf67af0668fc8412ec24c9d401fbbc483999649. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f159be87-337b-4783-a50e-342fd8914b76.json and https://artists.proofprofile.net/proofs/artist/f159be87-337b-4783-a50e-342fd8914b76.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 0x7ee81aa04a5f78024c429a5cd27c7b896a5992c66f810604b0aeb33f56bb1eea. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN62240523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebd4a703e9dad133f99b08299678bb9cf2700fb0a9a8d22074ef0b7b6762a11. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZHN52209520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc468aeeba07da2fd69a88a5db04f66c9f6f179153cd161859665903fcbd8eaaa. 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/QZHN72250736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb826ce443197b485d91ac90f7d426212dc7895198c1c90ba88616505442591ff. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZHN72250737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c61ff2d9ad231ed0c4793acb1b06630f9d1280e203dcbc081b9b377cefa4f4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6K2222677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221503c7bdbf87fc658fb9a657849136c8763f81ea170448386098b6bb0415db. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZMEN2238535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bea5c12994d090a97567ed3475aa95f691d957944a2241945511ec298c434ef. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZMER2296109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcf4d8edc28f728ca41334f9aed4f017757941f7b10424afb6428deaa7a99a4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZRP52298867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80fdd1ae92c655abdb0673180a499bee5841b5e66cb912f4a53a9f3637425ef. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAY2247690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93b2789c1bfddcb49ba1f49ab27cda1b8e70bb40db266922377138b39468693. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:47:18Z), 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/QZFZ22336830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d55c00bd094d1975af24857a801efc4b1e21db41fdcdbc41ff6d8163757e0ce. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:22:33Z), 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/QZFZ42301490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fcf3f75ca46ec412add27aafe722b6baf39f993349e654e38ace9427a78a9c. 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/QZHN32304472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dab619c792e94dd995382f61c698babd94387eb85ec94db1dcdbbef779b52b8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:51:38Z), 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/QZK6N2348723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9060a828ed49dfcff6f863acd8b1d56397132eadfd7a0f5ffc4cf663a4ca1a51. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:26:00Z), 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/QZTBF2378605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cd69b8b4b555577f1ed6cf19a991a327c6cde6fc240ff1c6bc14887971800c. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:45:18Z), 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/QZES92440443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e26f743f583db520a6b867853d0f8eccfb3b09cceb90060f37b067dbf6bfb0. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:47:39Z), 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/QZHNB2449682.