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 0xc8e1e1be6ff0509a8c1f7a35ae79ad13db39e8081caa04873adffd11f69c4c46. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1556d156-8fe6-4431-a6ae-0322edc71b33.json and https://artists.proofprofile.net/proofs/artist/1556d156-8fe6-4431-a6ae-0322edc71b33.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 0xec80344ce7ef6c5e124bf3ff4d2a2bdf19aa2bbfe27b969e41d42816b3099786. 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/BGA471710248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4522312bba353b0a01dcaa4d523e16f321c39f93693be616177ae3793a1f48b2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BGA471710250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8b681476e7e5dae9f79acce258f4adc8a7b4ad0f07822a2e929b7892f3a8e0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BGA471710251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab900e7adef3ccb41a6263ee8fc4573854e36adf61fc238f1fc4914e37c44fed. 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/BGA471710252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2984663b6bf86ad088fb70703035ce8301f420428fcea7d2d23ef0e143a6f6b. 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/BGA471710253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b8a8394ee2df3c745da710ab17e22234db2d90685c7f515080033fb3b00a72. 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/BGA471710254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4a46c8675e058e913be5dbd946ca815076d61b96e027f989f77fbc6963a4e0. 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/BGA471710255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a71ca0aada58efe80a1aebfb2810ec085c7770091c2899be3793a52d5e81b3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BGA471710256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb4cece23d215872fc803161ecf27da94cce86bb64018ea54b9abfc0d908912. 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/BGA471710257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9edb1f1e643d13179e6d8a476cccf01395ffe76b7578f89565f98e2444b8cf. 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/BGA471710258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7ee37fc48255dbfa2644b955fe32bbb934a07aed05f7b4c3937ad85f7dbe2b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BGA471710247.
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 0xda9016c4a1644b84626388bd4fdbb5878fb04942784739c1558f94f5a4d74831. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/BGA471710249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97081c7f0d435ca92c00dab081d27cc55e3eee05349d38bc3a9930bbc591d257. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLPF6734290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a29ff4e5c3f168837d48b0fba76217cb0d75e78c8d8944a838c7a75005d240. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/GBLPF6734291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c54af71c27fda73f00b2376249d4cd0159a4a7dc3f0cf4e3012b46098230c19. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBLPF6734292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cf42fad378a247d41d49a92f3c723499d6905476f972d2a20cd161fcba6ff9. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBLPF6734294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a903e3291148d02beff7b6b28724d40cbe72cdf5b3799a95c718d3f7b223100. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBLPF6734295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740349d12e930596a5ce1e0655f532121cbb42818bb5898458e364f5a7efc76b. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBLPF6734296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6657dc74901e2eb4b6fbb60a889bda38c5a1ef91c79a76acf5f4eaaf6487ccb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBLPF6734297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75bd08ceb18ee7c655dd4bca2eaa58cd283f4df9400b25b5f3fdcdf2444d9e43. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBLPF6734299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce99c01db2feed99d2ee734c739f2c27a7fb6a808c7de61584d1561945f6f8bc. 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/NL8RL2446101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad2542c1847bbfaaa33d74deb7a4128326b8b6241923efc21b16b42086a8650. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAHE2359932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cbea02405ebe89ff82347152432b77453fb844e117f9976238fb3b7a7bf30de. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZFZ22292154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad990e91e4eb96189c98451d188d83cacdca42f248179a62de3f827928a7f5d6. 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/QZHN52031861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f54ed077d7587863f11b2a26c0d03d0dd0b0409fd3d39d264eb3b10ec16b51d. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:22:42Z), 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/QZHN52031860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489294530571c6cbea70b2629c4de4e064075ad8691f0c9f3aad99e87ba0d0df. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NL8RL2446091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844656ff3c4c8fa89a6bcd8c31f33165066fbde106a577c2ae01795715e27b9a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NL8RL2446092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc83bbc246a8bdd2008fd0b4c28ac83ce8da83e3ae69af72dd661e7642e38c5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NL8RL2446093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808856da3126021d7eeee3dd744b7897c4d6608f0b73a4bf4d26249d67e03e1e. 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/NL8RL2446095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5828e1cac302fe0ed9bdebb12508e46e516d9e731491bed7bbb7930fcea354. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL8RL2446099.