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 0x85cae3a8c6a101c3834420142b8960dadbbd7c18569101009a493d2889701251. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55a8c002-2911-471e-8e10-840415dee51d.json and https://artists.proofprofile.net/proofs/artist/55a8c002-2911-471e-8e10-840415dee51d.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 0x79967deffb8a198905806522bceab416c5ea80d64d7388ce3ca583f6b8a8e9b4. 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/QZ9QQ2200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e10e0530daaed2732227d0f9cabb71aa9251bb5f592ed493b61f4203992b41. 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/QZ9QQ2200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f7793f80cb460a0e7a15dca03e7f5f77091148d0572fabb734b3e77d2dda90. 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/QZ9QQ2200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9f6dcd9ab9bc329e36bc94e07eca9c9e4e8843a685a7ef0887c34de27f83b6. 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/QZ9QQ2200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6039a07dc17cf15ab2047615301c49cde2857147c145e9b6e2b92d7ca30cc945. 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/QZ9QQ2200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d788a456b5870ba4a1f3b3d2b228b70c2261eec09cbf0d42348d65136473232. 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/QZ9QQ2200166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4043923f885b2f95e87fb3040ab34bf495f1060a0ebd109f6db7233259f964cf. 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/QZ9QQ2200167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798e1065564f8a740c40e92c379691061ac7471e1a0bf0852f461d1fb5e04446. 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/QZ9QQ2200168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6238b74a9ebebeb09c72517f708af3840db656965715748ba5b326d833a1ac90. 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/QZ9QQ2200169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e62913e9736b45ce627f21b88c148dc5ba5916fada1ab619c7dbd9e004418. 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/QZ9QQ2200170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eda4681241d08c31ffae9e9816ac6c316eb9629bc6e19fd8c9249b259b238b3. 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/QZ9QQ2200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab990d89bdc91758816c1141996b77806e57e7e4b8041c8f4a8bcf5a45239048. 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/QZ9QQ2200172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a750da9f268bf96f6c68143f75e49e3a650bb291201942fa4ac1078b52c9bd1. 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/QZ9QQ2200173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437ad3737d3cc980dfcfe70feff490e6314b21770f4e8b630c33f7b3216528b9. 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/USDXS2302228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6243838e4deaa5533c02bc8750cab9811b09b1159b3edf172c1bb0cc5e008237. 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/USDXS2400353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02290a138a51cd2d2921c8c8b26b1d7c29bbd8a03336e06035ab2785c802037. 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/USA2P2318326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed64513e8535bd0ec50a5cd0df41fe913a110be7ffbc2ba727356baa292e123c. 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/FRX762331649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c94efed938c56996f98fbeb908d03e02f10a718e665e89b749a5d682212ef93. 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/FRX452359497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51955afeec9c8365b39678cd47545431f0f33c0ef15ae1721305433273eb099f. 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/FR59R2283352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72c65212941d620b4614633dda2d62b2d8b3033ee2718f3ed819712fcac57b7. 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/USDXS2402048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c191e5382398a631439740dcc25985c9e3190246863ffe12030137e80fc5abc. 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/USDXS2402049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5872c5e40c1e0c650f95a9824290c847c213e42b3ea382be677e0aa73f38ff57. 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/USDXS2402050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c742b9140830aec13c5f8875b62488b4f2ec0927369387ab743da79bfce0d1. 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/USDXS2402051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a2f17c6e2cda465b4fd0f5738463962681dfacdaa740b932f0a4794e9b1f27. 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/USDXS2402052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcfa4d3a602ae0813ac852ad49c6f5cc6832d16f172b0af73fd5ea3c2474dcc. 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/USDXS2402053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ca2e5fabadcf713b77f226f8657504a74a77c9ae6447d9a02d9a9d1bbe5856. 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/USDXS2402054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf104d59ebf832198aac733e5bd04cdad0e5ff14bd2cada46da2fccd37b8da200. 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/USDXS2402055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d41c6271533e8a93e145fc98bc8c7f9a81ae3e1e260c3364983eb9db383f60b. 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/USDXS2402056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a22139f72a807443b5157ecd32a1ce862732780cd5710ac3e447cc6e4b207c. 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/USDXS2402057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe467d51abddadcf6367ec9c0b133c361b6cb0e772ea59166d4f085c76d8b679f. 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/FR10S2257062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd979aefc2cb3bc207a59a0e003583f2d952143391f11d54663159a0cac6b98. 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/FR10S2164973.