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 0x201c406f2cf98b80ea57d7fa68ab7068026776fd1e565fed089a16955a10fdd8. 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/a214cb59-f780-4dbc-91fc-322d306d424f.json and https://artists.proofprofile.net/proofs/artist/a214cb59-f780-4dbc-91fc-322d306d424f.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 0xb72db5dfaeb26179f5c4cb516c51c8ce74d3cae2e22249122a003fbc5a12a1c0. 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/TCADU1833613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d3a1cc41845566d0c571c74cbe445851f7556d3d271f4bc76bf13b34abad8f. 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/TCADU1833620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc16fba5b3dc391d3a42cf8224a07061f102e63b38a1942982a56b74a7c8682. 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/TCADU1833627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f8ebd078c286d1d2d9d6706e5b08e1e24afe59a2398973d7c3e7813ae0e7eb. 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/TCADU1833628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde71e445f6aa597e270e70a35baf29611d4cbac8f6f6513bc9b52bd81d729b7d. 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/TCADU1833629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3b7a52340837a626f7236515dfab216b957af6666a8f80b6647891efeb41b7. 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/TCADU1833634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b88e2a3a8bc0aebc006309f400d9a318edfb7ebcab41b6f726afd464a3129d. 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/TCADU1833636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334a3e709c112b93ec158901b6dfa5e7467a635386a35e488df9fa85be6a9741. 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/TCADU1833638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a30df845a98dfa5f7965473bd96e328a5d134e31590ded0a8ca24d69a7038c. 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/TCADU1833642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b665573fa242b4d775db4e969b5448354723c662c8ac9b02fbc268645cd3dc1. 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/TCADU1833643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef55062a2b60930c1ff9e445d2339d49fa4f709ce3f87095c06bf90b11af7f78. 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/TCADU1833648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c40acf8273ae20d2348bd6c7a3c9fe147539fa7e6ac136263651927ad1d590. 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/TCADU1833650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5f676efb49920f99e5abc8db7e9874373b9dabbe3eba2192de621aca1c2a98. 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/TCAEC1905571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349f00b6b98fd1a12d7d3d77f1ffbebe9756b5bc29536afbbd2d553f96103fa5. 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/TCAEE1950592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc6c7f291a8dae008b20706b19804e30b6f5aa7b341452dc8ee422b264fccc9. 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/TCAEG1914372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d9db3401535a9eb0f9d9c12ef335ec71f3acc3611d564fdde7ee00522bf133. 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/TCAEH1911235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33ede27c2d573bb355bf699e33ec6fd7c6e48211c6487b3bb50443c206458d32. 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/TCAEJ1962782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6703183d7d5f0629cbf034481c2ee9781ee931a5e8b10ca84a54b0ac1e7e45ac. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:28:28Z), 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/TCAFK2156401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14d1408656224cd3bb87c1ad1e22b33d55f8596f23b19d86aaced1d34bac6af. 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/TCAFL2179032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a243f6d2aa4af77fa28ebe3a98440d3f871c58f1a60a09e95dfc5a7b669d0e. 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/TCAFL2179038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54282628c90e6469fb7ffc97b156930e0ea2e978fb18bc61e7f4d460d24e1a24. 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/TCAFL2179082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a469969f69e3ac83114b748c18c167ffda26b65441d0846d285dea0a5a25db5. 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/TCAFL2179090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6299892d4fe23091e66d51bbf2a9d338e61ce512863af4615371b049bd9284b2. 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/TCAFL2183948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895f4b2190379380ff7c415671f3f19db9dcacdd616c15bc3c0c2680b8008e38. 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/TCAFL2183959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d658743ec4f0711aa463f468ee08ca7f25dc296dc322ee2ce08921d30e8fe3. 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/TCAFL2183990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c08ba35413549ec941f57757c13fa048a0d29b08c5a4be08c8841f2595a275a. 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/TCAFL2184041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf740b5d9d637d55a6b5b0acb23194596cc7264d427ba5b7b1fcdbadcb66cf07f. 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/TCAFL2184086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19a523c0baaeecc46393f616528b83f7d1f2309e67b5ea85f5b1405167bcf0a. 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/TCAFL2184148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73f418726860ef5ef896114f5aa6a0d8bae29395b9bf1310e2c74ba3921dc6d. 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/TCAFL2184166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33dfbdbd4a9f357ae0e014ef3ce7a1067bebbe4a39bb8064bf5dded49f35f6a. 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/TCAFL2184192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2408be01ab59798dfa9ab954e37299812e7bb4da15301f6070174def503cd0e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAGR2215203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8890c84379fa53a24d9626b8e9b0720c086e65c4ddfb508522b487c047cdb60a. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAHB2326065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9515e2937de232e189e30d8e1d82f0ee1aa6dfb6432ae65ed9fecd2a8950b918. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAHB2326741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b8478b19c0d948a559818832c7b61a59244756d5e18189997bc7e9ce8bc58e. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAHB2326749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd317be62888a15adba24826f1bf147eecca17a08b2ffbc0eab0ed0e6ad65f76e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAHB2326755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcc856aac9a49d0a503a048689f86da1f8b34a3c1cc137df6e40ede760b75eb. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAHB2326790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3643d83b5a14b568e793b9b0a0425c5c02ffc31ce1793585267f6d90cdcf6a. 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/QZHN42077948.