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 0x3076d00dfdfc4b9d5ebc40b35f9a45f3c3d7e9011dece742c67cc8416f2277b6. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/749cebc2-24d1-4ed5-830b-854b68ecc046.json and https://artists.proofprofile.net/proofs/artist/749cebc2-24d1-4ed5-830b-854b68ecc046.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 0x7a3ce87c21c8c018d7f5ee8e1d8268fc580a389918f22c8663c4d32fd4d9c1d7. 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/PL88L2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec88f2e7e349784b5ccc3eb364c758bf059ae6954577c14fa15bd8d382fbe77. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRX282200815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x734888593535dfde33c944b99c45fa06162558f71ed4c863d20b6807af99255b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX282200819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d7c26b16483d3ba0c75f806ad61ad444505f3bf2e0d11a5468fa8c3624b6c1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/PL0D72400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312a33c13652605757b75ae578f563bd89b093023a2ce52133cb4d32ace90115. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TCAIW2478944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0748685414f62aa62b2a38522c237d0f573e0dd3cfcb8c97c5a6e6a5d126c6. 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/TCAIW2478989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cac6fe33420ac02746b63978acd53403b26b4b8fd01f0a0b8f28887a08f80d. 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/TCAIW2479024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57025cebfcd52c3c8c6c9bbf471338d50670136fce444fb38f8aa32ebb0dd0d6. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TCAIW2479062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5362f7c9de632eae0ec6a0a4837b36725b836caa0f3c386b91bce5b2606a86e0. 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/TCAIW2479092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde2d8a0b7f6cd5113852eb457e0212f4165fe465db176af7543f8b05fb6a8407. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/TCAIW2479161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f11ffb3baa66042d2be33bc32b1dee039e6d287ea974a2abe06f917552641dd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TCAIW2479217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df535523001608634e9c2ece48a124ae71a2b207a1fd3843ba3bf206e697746. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/TCAIW2479395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368d10a745d91c76d6a63af4ccfeb0abb253047fdbbcd0c8e8f567002963335c. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/TCAIW2479424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ec6065ff29ee3964d7ee54351a16f22b94e9b32dfea5dedf8318b3832ec284. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/TCAIW2479442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce15d4cb6cc43e6a85e5e8754f61db68bdc27ecbf44b3c03eeef065f1044f5af. 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/TCAIW2479477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0998b2d3dcc22b7ae460f01e3d0653cebda10b71e1c4528c5e1f9800b5ecea5d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/PL0D72400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee24353a98f73914a7955ecb8f97980222b849e6cd94969cbdeb78fc43a14357. 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/PLI862500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b0670a812e6a52f3d12ba58927088f8ad561d129243a2caa51a61b18403196. 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/PL0D72400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf00848aa4386351086b80c8d246152e5a37365cf32bde62fb29b52703bed8e23. 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/PL06V2289766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96853205205e30283331308794985238643e3e3deebc040734339a1c75534775. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/PL06V2221975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c7e78649eff12166340b0c26d8ee31b3c6fb7ed63815ad0388016f30b7f86e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/PL44J2274462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb15f1cf9d355d1c254821d37da7eaed486de7ae2eff96a0cb793c3d3a775ac0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLH492299486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc430832311b0fdd2785f10b924302b7edd25f2e1df05dafbb4064c17bbc4a688. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/PL06V2289767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0589db5b946ba076fd7bd4dd4a92882886b77bedbbaf33931e85be55d3fa1bb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/PL06V2270722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f84f7141d443b3c2094c144c8475a75c6ef3798eb3f29f5735e4ad1229893e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL06V2289768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb157a6f42ac8246d346035bb3adf8fd7079e805066248aadebed68a54fa7a384. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL06V2289769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a94a139e7d02b0b29ab42df6105f2b0dc4c60493079af7166fc8a980fe422c. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/PL06V2289770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548de8009b28afb279433c46b5d08cc88c70cd6f6fe83a7c02d094847572a9c7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL06V2270721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2316d326f479452a83879b13becd7205dc12e0e8ac35d02de2e2d41374295e9d. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/PL44J2232598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae23b1208e9cae7a8e7bdc34ae9ff729317f260076c7bdb55e25e6619f606fc5. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PL06V2289771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f1cad2880b0df093115d9ee99bf7035e29a7178462ae9b70eaa3de0db099fc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PL06V2289772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec256a676c324e727233de278bde0bb6fdc1b79359400f140b86958cb2b5a19. 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/PL0D72400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6680481b21d1be5ee10d243576df94313c0bc05d142dfe13e8e54925af7bd913. 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/PL0D72400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc21fd9fd868d5c39c398d81f99b63d292df34c8999ebc2025485754976d676. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/PL0D72400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd580752dbeca64d3a97fbae2aed6179913ec535db6f32e4951fc406663bf873. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/PLI368012230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f79819e0dfc8623ac885bd0be6d5cd1fa418722e0d94ba77e1caf08f6000e0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/PLH492244065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c257c226653a9ba2a269890335c9a8051a9d38486f323f32149b3c6107e87f0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX281964936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa769d5539928ed843df01baf0b9ed4dc751f775d0a50ac63c3ea8cf92e8942b4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRX281964937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa828cf76bf813af7aabb7bb7bdb7ae55e04744d5ec9b25b88778bbc27f3490. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRX281964939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8159cdeb242f084f0e9406af77bcc253324401f470fbd0f0158944595e4cf446. 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/FRX281964940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25397381accca3d64436f9b8fc1426f22eb56cd95dd417db12fd995cebc4ff2. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX281964942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb590274e63b06e7ffbd9d1be572705b80f30734c23424e9769b9765e43aa368b. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZDA82585415.