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 0x002de73f2be788bdb1d3b4e97b36eb1bf41f74283d71fa8ece88a1bfde86f666. 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/708cbd13-b19b-43a7-92ae-67b81c7d9133.json and https://artists.proofprofile.net/proofs/artist/708cbd13-b19b-43a7-92ae-67b81c7d9133.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 0x24049a1ec692119323d1f1a5ed58b328569b339de8badc8c1dd9c78e4b78f57a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZAKB2160017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ceaaec6a2f886a8ed934ed0e79a527eb44d0a86472f39537a77193954f176d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZAKB2160019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11144c6927d08094e8b5b36444e6acbfb444bd252d57f79eaa5e98e042d689ed. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZAKB2160020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0993b63e6dc1aff52fd91d83afb6b1b13a8bbb467f39ff17a7600abc0b40b57a. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZK6H2130322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51382b727d54b984fe84c58a4cc7b324ccddd542a3d69fbd246b7a555cc95e18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZAKB2160022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879cffc74efcc0accbd2548b13b59183dea7678d6e48d6a0d500a90186e47937. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZAKB2160023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8202d9a5bc01af8295f1b77b1d2aad00d15fb042854fd70e7b33e2057dc661d2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZFYY2207764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aac1b4cf1cf89d14bb7bf436d5154a8e11faf8b55fc8bce8ad78187be508dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWU2117468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929a7ba01567b3633350f16233c367e61efcbcc62b747c0a7e0def551dd1106f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZAKB2168726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8d520f03c9e687fb1fcebbf117c0e41282ac7b80641e19f2f20612e7f5ea01. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZAKB2209950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd710f10ac004c3eb3a95af57c748a0430fc0e2b87022e5405f1dc363da1903c2. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZAKB2290796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cab84c7305bc2b6f9c0de46f8e976f30a94f1436885cd4a158df4bdd9863616. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZAKB2290798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cbc02bf8b631af8dd4a186bad5b7444f9d980e70c2aefc403d01345bfd2852. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZVEM2312480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b50d52ce95dace2e45e35ea9ebe9310e2a20a005a733b3b0e42b49aeee5899f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN82266786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc6b6a2b9f3c248c4f9ceccfdd142b0bfef269c8fee33f3a72548b44cdbb9bd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWX2182704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da185b775fdfc37c569c58bff128f609ed5d50631914cab2e298081425955c1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6F2286021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6658a48e7e33a5f7a7c76f5f8c2cd9dff09ad789ced8314272e609134754dbdc. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/SE5BU2387218.