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 0xd64978c1e532330307f746f4a41d87d37f996590835ca1ae62a6f79ee9c69c19. 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/3a96e37a-9d7a-4f7b-8f73-87a8b76f09ad.json and https://artists.proofprofile.net/proofs/artist/3a96e37a-9d7a-4f7b-8f73-87a8b76f09ad.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 0xa4c22381cd09f690fa261e255d8a23384be86c2cc86bb54b09a2615b1e2b110b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GBSMU7725390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1da343c805d7ad7e49212e3df5d68c014e5b7237b93fee32d301416d56332b. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/GBSMU7725393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d448ade74c43d1f400e45d6ff5a297d2b5b9c54b4aa88fc20c6839e5b6e3576. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:03:00Z), 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/GBSMU7725395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0e15fb93e677563c9ca6ee26b94a4d8b55204104468105d0b7c634da0ffacd. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/GBSMU7725396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49bd7a3eb300561272ec7b33db204c553b863af615efe9de5e2181c538ad880. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE5BU2130165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cb5f96b1cfbd34a3463cac7c8c8d7dc090f7deab5ab01aa119aa7a9913e267. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SE5752120579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd64beeaebcd9830fe3a86a7ace79598cefb1a61014bc6a33176195f061e9853. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/SE6XX2185990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139ef262d07efc5f2518b50f792b9c1a1b49a9b1bcc33bf40f08efddf44208e4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SE6XX2206978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f10a6413897b20cc07664e3dc52329e4ccac50ef608741c672de510bf5fb335. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/SE6XX2207370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f99a6f17fec1fd221f972d5ce9fb98cf206fec0afec5fc44438e1a5677f3ad. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/SE6XX2207372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6c5301f9e4c1f359ca537f6a3802f50c69ae479bc27fdbe3894f5e4908b684. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:15Z), 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/SE5BU2387445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b60dc8077b106af9d7da11fefa0d272e6aa666693b47fded10385b1c11a498d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:39:10Z), 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/SE6HN2330415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15321109b1c6c1c00d597e36357f00f38f2806ce3de50f9240b6282b84fdc8b5. 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/SE6I32338539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3197660e1bcca672496647b2589a4b843c5368415951751aae033fe06e436c9e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:22:45Z), 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/SE6QE2397190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb11722a116a8793c3218b81c916e98590d8582a2f6118bff2c052cd62761bb1. 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/QZW9L2394885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbeb88c37eb3d95f2a282604110f30807a9b4f06a2549c6a3ba33d207ca2a89c. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/QZGLM2406041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f37c85f27734943efd466d6f40dae4845c73ab5794e70db573d2c5fe84167b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5BU2466094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec38e2fb2d546be025495a310d16d44970afa525500ab315154fc9df1f50f74d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:11Z), 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/SE6XW2410729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c7250caef7697c5b83ac474741fe06b2b9f2fbda5e121a554b80f3409e1a48. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE5BU2590284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204918ebbf894234de8d13560c8f09cb0467d0d3d488a7257008afd00e198782. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/SE6XX2592427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b1ef61f13b65620e6196106d324049a95c0aa1dd8420b29be2b0e58e3535b6b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6SA2535164.