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 0xe14323ee4d3454944485c8163c98facc3ad901152312fcf65d4feda404ce1730. 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/6da1086a-d3c5-4f66-96a8-1d6f2e9cb19f.json and https://artists.proofprofile.net/proofs/artist/6da1086a-d3c5-4f66-96a8-1d6f2e9cb19f.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 0x4cdc116e7465128a1de1b22b2414d73450578bfc61f82b311b6180ed3f8341c4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W11904003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55aaba3c4599734260c51cc4d13958dfe247b1438a35ad9c5aa2a85598997a9b. 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/FR9W11904004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41993a70b508dce479c73f273b59bdfd80e9dacae7c4ae84ecc226858a546449. 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/FR9W11904005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d4be36c4776b3048378553c61eb8a35828f5dfc05b499ff4b17fdd42677e57. 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/FR9W11904006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5cd35692b9e1b490e802555d9f0f231b2eed1fbee6447f75bde97ece1948a. 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/FR9W11904007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed08c2da060faf253dc98dd6afa7d55720ba4903f4b897d02c52636681806db. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR9W11904008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e646be7aa3502110f21c45dd32ed0f86cc7be0055c2ececba6181ba5a05a2f. 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/FR9W11904009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa2976647fd03d1557e0768f698d60c44c4508f3f98498f73db7d479b748e23. 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/FR9W11904010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423ac7e07d94fbf2e7920c3385d8aabf77f71130ef072fdf0c396e5c53fc96ee. 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/FR9W11904011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a05363797b2ba2439a122fbea874bb837f6d0a05ff0d9ecaf96a6664b30b6e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NOEHU1582001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ac5915be8e9ba3bcf0e1e1027788168aea400e8a2cb74c239d18e5a3919840. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOEHU1582004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59023ca2e04f2b85731b841490fb0b49007d8d909f0fd50104dbbae27cdfc7da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOEHU1582007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e85fb4cafc18c1bdacfdec76c7ae34a68ed81f2689b157e4851f5a1cc598da4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOEHU1582008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1152c2357bd2d97fcb1259f584404119793acb54f54b17e74067336938766c2a. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:48:51Z), 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/NOEHU1582003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba95f3425b8a9b11acb060d75a86ebe8429c4488ed42d042bc3f03870fb96df. 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/FXQ732000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d4be36c4776b3048378553c61eb8a35828f5dfc05b499ff4b17fdd42677e57. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11904006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a5cd35692b9e1b490e802555d9f0f231b2eed1fbee6447f75bde97ece1948a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR9W11904007.