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 0x899dce540e8be575c537d0140354542d123b2c11fbe37d81ff0c9efbd066341b. 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/08a2171b-c176-498f-97fd-a6bb858ceafe.json and https://artists.proofprofile.net/proofs/artist/08a2171b-c176-498f-97fd-a6bb858ceafe.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 0xa62839c66390d90b262c00fdecda5008ea9bce5644aeb70daca291716ced7d3c. 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/DGA082216771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c08d8a88bb0fa2bb949fbe9011f2380acd3ed8ba829f6324efd667c5f545aa. 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/INS182401884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efa811d72f1ab2fd81d07fc54788a99419425e7c9a74152b60ee916656b9b46. 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/USA2P2418863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x570c7ca04bdf67f1992d6ba40ba8bee60a50b2b868939e077129b51afbf511c9. 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/INS182400500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65946ec21e0578a6ded568cb4ded0799e1acb31b56574353a2c8902a1157f06d. 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/DGA082390241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a053b9154725d878e42da93ab1213acaaed412d4b627fa22aadab4658b86bb3. 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/FRX762300756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdaadfacb22da47c9daed699dcbf8bda3bb8030b961292924a4d48cc49e70c9. 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/FRX452307729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e824023cb77707361760f984f79ac25c9b92719ddb05b446ddd3113183912c. 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/FR96X2347831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8176760d43e845452678f2debbbc7c758a7b3f60e9c8dc8e648178d2954352b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FR59R2302736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120101dda6c3b3832694eb3a0b78a7ea8ff31c5cd59e66683f967a9c6388b043. 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/FRX282272713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4cdc3625509fb298e58039fcd31261eb2b3398d801fbf8f93375d9eccb8ce9. 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/FR59R2241091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ee14473ec77b6181be4e11a98545abbc94c8e1320f50ee9af436cead7a1256. 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/FRX282123694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38960a0c0e3291cd5da0caf65c3d1bac56f9b52a1dab665b2577e927628c5d78. 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/FR2X42195487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6634ad8b12621312517d1d3ed49e968c0b832c1a0361726537b9a37d2a937c1. 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/FRX762092331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a22ac23c73c369d79920a6449fc5bd70f6277f272a01dda243c0ff1cccc0758. 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/FRX282055050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5baa57d5f9b515a4b96193401f6548859b8cc940f9a70ee40af94af3f87f3f7d. 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/FR59R2097040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815bf6921521b1705e64255f265532354f09d52f7cedc982f6e6dd8082be0ea. 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/FR2X42060931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c61cfcedde49573ac27544740f9e88566e7086ced39aff2060917689aaa0d6. 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/FRX452009066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa073daa093c2250088908d7984f7638be1ae967e2b46330b8f428b50d0298c2. 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/FRX281985393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec6cb0c41f3cb8c9fa9b0766731219159de95b114aee8dd3017a0206c243be0. 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/FRX201982605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f017f4afc17f0203ad24e146f1ce9160ca545fd8740a0e385536b394595c7d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FR59R1954101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f27f0cf35ad8b8755b2a00a2f1533023fc50c5e9d2154568a0cc5054944339. 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/INM241819587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe866187483b5457eb29b9e14d72a0890d667045b1fca74d0a0dd3379c5ec4b35. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/INM241818957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e8d0d01a8abc1927e2cecc573e78838ffc279b980272cd2637c1e238fb22212. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/INM431800301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45a04467b08a9eb166887ed8a37d68637e9ea3679b5804372ededaddbb3c115. 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/INM431800129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3948779011fcc120b8ae0c191df6a3fd3ab41bd6e5584a677484db694087fcf6. 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/INM431800048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49b409258b3689668c1906c28dd72641d9ea40b414884da50df52b717b4e03d9. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/INM431800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffad673629a0e998c8aad252ddc5a865d8c7e00b44c1fa5cb1a2a86c6561cc1c. 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/INM431700285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8e2a6d091c21ace2efd08a89a7e4620c7f07dca206db802209c8edaf3be3e8. 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/INM731700101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90af2e9cf8fc05b9cd10e7ccb4724ad0340a7a517b113236a48f39560823dd9. 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/INM731700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33c3bae43b010a228bff14947d89caf88f2c029aea7f8c03a7b56e1156e4b7f. 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/INM731601109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba132f8d626815f47692001b2e7f2b0fc1873604c49598de0535efe978d9e8f. 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/INM731500965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867e13a5a463ac1ee0fbce101faad5cf92faf187ace750f7d89f52539c3be8f8. 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/INM731500519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07da29e1b76d89885f873a23f6e194600970b77ac270161aac965b2eea103e45. 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/TCAEH1930394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b6391ffe4ba4a9c38799862fecc6d2eeaa788de73b374e569f4620b01eb865. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/INM731601474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d8d64661c2682747c503e6301a1e7e1dc34f314307594409dfb23c05a14fd6. 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/INM731600656.