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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139a6299d4111cb89bddf4eb8179446c2a47bcc6b489a3fecd70fe07bac1a19e. 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/daf117e7-95fe-4b4e-840b-54a093cd7f2e.json and https://artists.proofprofile.net/proofs/artist/daf117e7-95fe-4b4e-840b-54a093cd7f2e.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc6e180048b2f537c58e35d59a8ae83d87b195b7abb935747d715ad6dc10ffd. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAFL2130627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20fdfe74535811720d59b865a61438a4250ba15defea49e26d2a66881ce2645. 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/TCAFY2106042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd0f830c79bc942780f5e875347e49f025d064c2b365de6e608df0bf50891f20. 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/TCAFY2106044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e027a3ae5f87c3c63d8de68c55bd7248a8e432b08282d1064a1a48eda862e5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAFY2106045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f2f1a3622da2bb34cca2f3d0c8d0fbd7abe8f18663a4ba5032f4131a0c1c7f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAFY2106046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897b77d9660e54e8c0dda853864188428d63271c975c5d4fe57df44601069c18. 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/TCAGE2224888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24de6dfb690ced05657db95bcd9ea7791e472f9886700beceae8122fbe9df3a3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCAGE2225091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afdf1fa96530b2fdbb3dccc8ad7d96d850c6687cc4b40b91d27d8f13e1eb6a2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAGE2225416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2407ac1f2bb9e3be7ba3745ae725e2eb1b7d601855aefece5e7ea0f6797ee130. 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/TCAGE2225424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2269ae6168df2df6d1a6499200c7e49b37524977905ec27b82ceebc8a5d93302. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/TCAGE2225427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa080ff3e62600b2d18567282d3966bb0f7429b967f37555562ad4063068c0a6b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAGR2265118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f1a0535b5e6780d5da2da11f6d132d5bd06dcaa856c5fcd5bce0b39d2883c0. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/TCAGR2265119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7727baeac0a4e88c5b1697e83b0934d6d020da0390f08e251333d76e5dd0b14. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAGR2265120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540f67c9947681d62927a6c2b968f6577ad9da3036c439bfb2a4d300a3514e12. 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/TCAGR2265124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc372660dd38a3b93bb3435f8c1f8089f82ca6bacb6645b8df5210fc876d50edc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGR2265127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9150751344e47f8a7c9bbf468d13cda81153e2a36508b4c3de03aa0536583976. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/TCAGR2280737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40680ddb7c3f730691a252d645339410a6ea6640444db446b2409a132c735d7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGR2265231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7346b67895b7c825b705228ba711ddb9696f7ad5be2b6ac491bb5101ae98d1a8. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/TCAHZ2463543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde30fe55b83520536387d4158b163096f38a6655e4380506bc4ea4bb943627cd. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAHZ2463547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4ec779ea376bb3ef5b3bb69600dd51a644ae85486c89c2b82943181237e007. 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/TCAHZ2463775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb72a771605554bbd4330267104802ad4cacf42e2367bd6454aa4560295ecd54. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAHZ2463557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fbd304f9af6511b1b29411869b896f42e012d65fdd1d75a8b8d6bba6c70d0f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAHZ2463518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5bc0ede04c219bb6118da8652efd8777bd8a7c609af53fe0544c9e728932ae. 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/TCAHZ2463574.