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 0xbea163eed29c260995c226462e9084d84a00c9902632698bb46e17768ec17548. 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/c346027f-6f05-4d5e-a4b3-e4529cd985d7.json and https://artists.proofprofile.net/proofs/artist/c346027f-6f05-4d5e-a4b3-e4529cd985d7.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 0xfa59a0c79619114ecdbe9c0e4c28528a0c7998b6935e592743d367b9aa59b03e. 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/USUYG1457549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628fa091da3036e3b45c00daacb417d20ea70ffa85bd2f56328d73580d551490. 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/USUYG1437350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc4eaa61196f08b119ff85e5629ab7718d11e7158638148641bbc4794e40261. 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/USUYG1457546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecfab4a5b6ab3713c8cd4190941b2653945020b1f8fc0210e9557041b5b13e8. 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/USUYG1457547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73bf57679ceb77df732128a4a18ccbb530623f67eb675e3851d7b4c596508a7. 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/USUYG1457548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b38438d1b6cd7bc802d36db46648af4442fc685445951f7a3ca01bbafea6d3. 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/USUYG1457550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854af2375417ab91a7e7424a86ffe02df02c74561649e30663843bfd7766153. 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/USUYG1411520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a25339acf6f6656108504f766a7d1165c75cd37e579164d5adcacd1b58f1d0e. 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/USUYG1457554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8854af2375417ab91a7e7424a86ffe02df02c74561649e30663843bfd7766153. 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/USUYG1411520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67a2d5857a96077a1272b035dee71b2f86469f306234f08354a45a89425c233. 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/QZJ842000956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637d1b754dd364cc4577932ed1bde32eb5c9be68596981c2cf1d381330f55040. 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/QZK6K2029358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ad50e1ecb4a5c47ba82822c2e7cf63268f68e88d5acbdec6cb484e9589e3b. 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/TCAEE1925771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0801ded632a862470f44daa58b6be800ad3ff6aba1f6e9149aaac271c0dd3a4. 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/TCAEE1925779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5bb0ae98656929435db1ea2c6f860f22f50cfb78d48f347d6d3cc4e7deacba. 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/TCAEE1925786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8fc5323446c923e6780c5cad9d14b31539999888fa256f5c1e8ecb6e35e7b5. 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/TCAEE1925795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d8a504e13c935e4d3c60bcf72995a8d39b2a542224a6675337735e7fa7b9cc. 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/TCAEE1925808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38acca66f386cb8dfa3d0c7e2cf820328d0a07670aef517b34a2a8f6794c356. 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/TCAEE1925814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2471310d6660bb9a7bd6919253c006e9b9bdcd46e61f2617aae33baf18aa6ef7. 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/USJ3V1492822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b520adef60109efca5a65924509949f5a99909fd680d7ba2a748a5abdc087b. 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/QZFYY2494703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0497c0f920888093cc413f513185a02eda64ce4df09c2e048765bb91eb22adfe. 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/QZWFS2313007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126cbfae9d3749af2995aa9234da1e3cfa37a4f4ea7a9a5e4dc28611efc3f816. 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/QZRP52277426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc83985d9c5fa3213c7c7429b17495f6582aa4e427bea7b4952b420908e8edd4. 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/QZNWX2235043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea921dabf2440c57149a66d2b73a5767f97290f3d7229c87de76bebb33f69ea. 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/TCAEX2054844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bf2329f8b91132fea7568ecd2906ef9119e2fa90783c7d7839042991c3440d. 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/QZHN62424004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e59eb5aba58df46573df217711437bd6b55c06760d02ae759c97bbc86c380d. 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/QZHN62424005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34e50f657d187e6f26416b030e5021e10965a7e37be7ac52a82eb4038e021b10. 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/QZHN62424006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9594c7a3509585396f642d5bd6e4ff249dfe893e85f6ec01e334680ad2748097. 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/QZHN62424007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d44cd97ce059f21a5781716fdb2cbf5b22bdeaefb91cc23e6d36bcc47e32400. 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/QZHN62424008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bbb73257631c9f251e61d77f1d53bf31677d407a9693d6824c73ba2f96a90a8. 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/QZHN62424009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce3ce00bfa39ca6612cb5acf47019d428542016426508798900655e2b84b6c3. 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/QZHN62424010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87426756477a95d8129150768ae74667b96e161f1306825437ee31fe617cb7f. 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/QZHN62424011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d00fe9b73a17cb428dcfbb30ad09826398c56181bf49bf27fab322c2712762. 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/QZHN62424012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcec1aff50eeb2cbe47070ed866a6df2c496ea1c11c0145a294bd74745d4bd278. 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/QZHN62424013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c654d0adee1877f43892c9a4452a43aaaa825c915b725c9fb9006caf9bd6e18. 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/QZHN62424014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c42429911945f47c965526eaab40b8c16f551bac1fe968c379683d00cff2aaf. 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/QZHN62424015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a807b87ddb07495c90b78249247aa9f74bd77eb5ab9d1605934a94dc9693c6. 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/QZHN62424016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80305e14f98f18833026dcbab660b349974b22e60d7bfdf8d060605f4f5db5e. 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/QZHN62424017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b590348ac9bbfa2282ba2de9da1976cf48620f8a5ab5754fd8ea2cb798b23e. 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/QZHN62424018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ea237a4cae0d2ceb0b794f0516539c20c52c524e0dbc59d9daf23edd331dd9. 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/QZK6M2410010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809ff3224201f2d892ea2e14eafcf24d7a44a3db0d3f9dba04d5676df2e167f3. 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/USUYG1466287.