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 0x7a4c5320cbf34ef20e7fe7fdfe4e345dec81c2a7a5bd377d044530f57440654a. 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/2bdd81ff-92c6-48aa-9040-d30d5f1938cd.json and https://artists.proofprofile.net/proofs/artist/2bdd81ff-92c6-48aa-9040-d30d5f1938cd.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 0x51445e0cc424f19c88bd3db631b1d289399342d8685156303c8f014be69da7cb. 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/GB2GX1900391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85880019bba087c9a638a2d5a1c47bd905393168bda2459dab765ae49808e1c. 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/GB2GX1900344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a12eea5d5e43031014baf98e0cc00c4c9d60c4cbc297093551bf58f294451c3. 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/GB2GX1900392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3768ccfdb722296c79b3553c44469dc50ea8228795582eecfb6186c933afd94e. 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/GB2GX1900393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db55da23971b63ad2667f6c9915543bab5cd13c36d3b5c41178e89393bf9a26. 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/GB2GX1900394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf272ccd610b3aa8ee0cfd3da56bd63ad25805b899caac79fe7237546ac8d0b2c. 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/GB2GX1900395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990e88b7ef12d82d9c7d4d2433673a7c24e0b84a83ee1eb6b1add8fdb940b5f5. 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/GB2GX1900396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c99ace4c02993c22bb9cf2491c23b32c108b85f3b48314a34be74f292268c4. 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/GB2GX1900397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa536f0417cb6783430e3bb30c240883c250428d47aed9aada6e809c58a705b1b. 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/GB2GX1900367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b0d12a286ac81512186e9f99b4664befc64a37ab8c05a1e87f8666c94c23ed. 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/GB2GX1900399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa262eb3f9907ce5bb4acf755c9040d43c44ad823e8494326aa99fde7dcdbf811. 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/GB2GX1900400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef6ba913d4a616c1e42cf318175a45a6a723c506a0ce7d16d532e8bde14f068. 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/USZXT2351045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd1a68024bda0c42acb7d3d9fbf170f7f124898618cea30bc229df36b568b5bf. 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/GX3Q92344227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a6f2de35a7a2fc56d30f4945b86cb4337a447f768037e18a859e9d547c538. 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/GX3Q92308837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec59560007d7a5926c33487c9c700ae01e51d901b0416ea2dd8fe35f6adf3d5b. 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/GB2GX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0300332a56297bad04fc7698be478a80bfd27090fc7f8648b34f17095792c167. 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/GB2GX2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4ff41942d7fe143e859165ce5048205e871765266649a53b70d49ae47586a7. 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/UKXN22137692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7aee18c41ed8951aec11fedbf163fb04cf1ea7b31e20b17380601b9c5455645. 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/FR26V2057258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc22503c55f405a37fa2df3332fe62a861ca72923bae185183b77c1f958d951. 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/FRX282051073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce4ce45b1733921ff6ba6e1b83eae04c7713691591bd1b7ceaf3ad751b21fe8. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/TCAFA2008441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6decdeb741ddacdc9cf59fcbd07810b136b0d4332ea9131c89c2d79b968fa889. 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/GB2GX2000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f74d7bd818dc9f13409a0887e555242dc3eecda2d0107e3e4c8103090f59fbf. 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/GB2GX2000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x080d43f9f5e1002e3260a913ab4745e9aa747cc8e61ea729eb52b2774e3f3805. 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/GB2GX2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa536f0417cb6783430e3bb30c240883c250428d47aed9aada6e809c58a705b1b. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GB2GX1900367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85880019bba087c9a638a2d5a1c47bd905393168bda2459dab765ae49808e1c. 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/GB2GX1900344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8e503fecc654f4c560719490ddf7473870fdaee4e79f0f86cd8a9f0c0fadac. 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/TCAEI1923021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa2caf962dffb1ab13ed2aec56246b070b5632c7e3652b0f372b0e9de9a4903. 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/GB2GX1900206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c3fa70157e43f0e9691dbebf88ea64d9807b1869dcdaf3a8169b719a3260c6. 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/GB2GX1900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72faf25794c9e668730677d244f4e51c3cf1f2021c8201306cf7d67c109f044b. 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/GB2GX1800306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf005c19dcdc6d4e42062da69754a1e8eb3e69ccd0751354ee85bfa1b1405dff0. 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/GB2GX1800307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217243f6133376a26119cb864af7a64ab9e0cf6f07f2542dc6664f51ad48f95b. 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/QZ93L1821906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4528a9413283e386557faa9b052c43edad5aa3d3f38f4f06b64d3ecb7c375029. 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/TCADT1887136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa42a51fe6bc40776845b81217cd86ab34312a51a46cfa4a2a626d532ae763d. 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/TCADQ1807313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc67a6f2de35a7a2fc56d30f4945b86cb4337a447f768037e18a859e9d547c538. 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/GX3Q92308837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2971367c45169a4f132619e6384360d08969cb04d6586aa01a77a555f3bdd7. 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/UKXN22049891.