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 0x39d51b31e62b0e01c8cdd947172e64c1c8bbc7aba33e4fbb8a6c4f092151f469. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53d18d15-b8a6-4981-a02d-e13e963fc47b.json and https://artists.proofprofile.net/proofs/artist/53d18d15-b8a6-4981-a02d-e13e963fc47b.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 0xbde8162af4544f8f595bbaff5f26f08d42244c580b4bfe7270a06c583f8fb7d0. 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/NOMRA2101010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ffc4af88e5ff432ab3300d6d3e5807f09d71ce2e9f1d1cd3b7926f16175fb95. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/NOMRA2101020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95896fb59ec757514cca1c15ee1881641199036c1398beab91d0c0fc33852064. 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/NOMRA2101030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b4e2ecaab89c1f902da52c0f6fe0390b17a2baa2b071c711d2e3a33e12ead8. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NOMRA2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c318c488252695ef56e331e764fcc3e53baba2ead6fedcd8046a9cf8fb5fcc7. 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/NOMRA2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b4e2ecaab89c1f902da52c0f6fe0390b17a2baa2b071c711d2e3a33e12ead8. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:13Z), 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/NOMRA2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c318c488252695ef56e331e764fcc3e53baba2ead6fedcd8046a9cf8fb5fcc7. 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/NOMRA2301020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf04f749d460b5a1dc013c5d3dd0567097598accaa4f8cde5f516cc25d9174b72. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/NOMRA2301030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c23aafb655f8d614149562f9909c345f2f37156f6d7a3a009b7073ebf20f434. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/NOMRA2301040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82511cde077d70f3076e0e5bd31fee0891a1db53a5c2682ced7b2b5037bcb872. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NOMRA2301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcf528499804ec8133a983e5be6e2fca66e6a7d5a652a3072f7b300fe2f77bd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:39:26Z), 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/NOMRA2301070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29fe00ba0e88356e2f619610d485df57ff62fa6023c49829f2c4c085c0d7620. 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/NOMRA2301080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f3909bb47f6fc0733482933aaa34b0f5598e3175f393cb6f09e1b087ca6c58. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/NOMRA2301090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73887bd282a92351f3fc7b2ebd0f1ebf1e7efc3f75dee777fcc10d1544cc4a9. 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/NOMRA2301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe36795fb3c376350deed8c8e683bf337315438b079ae0ede7c3bbfec2b5997d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/NOMRA2307120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38710e2ffe155ed1de9006cc54853dbc254eff172035b3c33e8d5eed3e385f6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NOMRA2401010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd823b6fde4a08b598d1ba2db74ee9772bfd1d35929cdeac2f4bec3096fa190c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NOMRA2402010.