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 0x620ba02dc72a98d4b06545131d34f49e41a783580e7868c279f61fdd0c135fc1. 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/09072175-a8aa-4f77-9858-85bd072ab51f.json and https://artists.proofprofile.net/proofs/artist/09072175-a8aa-4f77-9858-85bd072ab51f.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 0x1cfb7e7182bfe2f6d3875103f2039597aa266cd1ea8f07d0e5312fd431698f84. 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/QM4TX2452494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094b4eaf0c07c69e45d85283aca12ffd05ffc4a108e8a990c69cfbbcea036c58. 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/QZWFE2325767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66002c39e25c00475eb630ccde133158f1d67dccba2dc6352ea6d29a0d60e4f2. 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/QZWFG2352978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1262db0da44827598c1e711e0a974a886da78110d2e910ccbecf5be90fcd8404. 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/QZFZ42457004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1921ba194b3dcaae0bb8ef473a508ad4c13ad374c806438f352c425faaa86c65. 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/QZWFK2317269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c06ff34abc2403fa46baaa8229e80dcb3add824faac4b4ac2cb6c83146866cc. 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/QM6MZ2435447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bce1f9d35f541033e56bf5291d7867346aad9a55ccd953b7d73789982038a5. 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/QZES92410685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0eaea8bb9ae57e16e90af76e47b6132248bcc3cb466190c41adce928fbd39a. 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/QZWFQ2304034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a1bd3d0fcde3a809ea3488826e76c7415b9deb421fc2bc4ff5cb0912b2f768. 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/TCAHQ2397359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a1986564725abac7fa1fb14d7c226f5b4d3441fce47c4a03d55d048496cb4c. 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/QZWFF2373879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2dd65b986920c7ba3157abce23dc1217aba9bc019ab767fe100c665cc03dde. 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/QZTBB2371138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc847f415d96a3a6e607512de350ba144db8047eea28543fedb3e9e7335cbd3. 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/QZK6G2304993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d7a0e759a8dc0e54bf1a2fb62cd5186fdf082ee598f62720e20b66b0caf118. 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/QZK6G2304996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920012336d4d3ae57458f5f184ab4d915c590129c643c0f18816d28666a271db. 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/QZK6P2376527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116126f849aab4fbc9802e6675edf048598205155e4d3f358f763b5067de37e5. 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/QZHNC2304365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4388e841fea923fc332ec31f89d4c7edb8065a55612f809d724c900a456e2a7d. 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/QZHNA2331717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f97ec1fdd3b1e69929b19b23a6452f0045a3f47f8314905d440852cf511f41f. 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/QZTAZ2231843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3336580f579412fc485e4ae31e0c935b96b412dfcdaef1166964ff6ee461263. 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/QZTAZ2231844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2815e67281767c1aebbb07da6db039fd9adc440c3b6396da66e98aa43f280433. 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/QZTAW2200537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3942680387ce333a0dadfc065ab3281f9fd6bcf5d00083396580c6b8107fa4. 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/QM4TW2535347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5709022119506ba3bfeac0778d0cf9a1b756e5e2f0f2dadd129ce074985c6bff. 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/QMFMF2466022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989f44e9f3c958477a581be319b33bd6f99423445ab789a283643f394503f2fb. 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/QM4TW2512482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e271084c3dc729e388df8886d017583c680ef9fc96898b339eb79bcf5b76b68. 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/QMDA72490728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3008006d2d299db4084f0ec6cef4b8869288a85393325b46608e860e5ebadbb1. 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/QMFMF2437387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1113f6316c2b072d101a23e27a7f36bf888d8821b589e9f4655686f3b750e600. 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/QMDA62410517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723b7ee0a062e5cf7148c0fc604260a58d5e14bd58cff63401debb19747232ed. 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/QM6P42566004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56230b0e4c14e30c0fbd3e355c749a14465b2e61eed3cbfac05cc165ead568c1. 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/QM6P42566044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1bc27dac6e586f14d12c153369d233ebfc6afccfe5bb916bd7e183cefe56af8. 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/QM6P42543038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922079ca519ede7f9685e5d7c4b096015d2a22c873d57f075825fad69956ab92. 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/NO1R42501510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f065abd33a55d2c8558eb8e0e195e3d2112450308fd9f51a1c6386397cb2e17. 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/QM6P42512967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04af617da1fadccfdeda437a174bd2a8d20d61d22246dbae2b2dfdccadcbe7fd. 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/QM6N22572597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21cce2c2506280e9fa840b705880fb06d688b160310ae7d2b68f334171de0eb. 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/NOX8G2301890.