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 0xe4d0c9a114f0a87d1e1372a6b668b316386c3508169a801f75bae8fb22580448. 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/32e9db94-424b-421e-adaa-62f9e2a6aa6d.json and https://artists.proofprofile.net/proofs/artist/32e9db94-424b-421e-adaa-62f9e2a6aa6d.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 0x141112f66a0f817fbf8ae99a0db969c0164790b1e7857abc3ca2d4b1223d08e6. 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/QZES61823353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922f0a05ee4f4f739c6eac4689b0a63cfcb788a6bd8332434ca88e99e06187f4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZES61823355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b7ac1e89e54413a9b8c79ca2e6ba46a93df49cf71eb0e92faf55d66e232341. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZES61823356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a1f414196a29731a1ee09650dddbf214ca51c0f4a159f9c5af4fc334eeeb34. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZES61823359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8b6ebacd613c3d934e7bfe324291cac300ffe2a4c635180e90e411b06feef7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZES61823361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957b130e7d870ccb8f51a0cfb5b964f2d94f9624a4f80d992b5e5229274f4762. 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/QZK6N2271393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa65166161f7e4ac859ac24daf9585f4ddf72a208e67670c4d2b5c721bf7576b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZES52298295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d9d2f80b370dd10fded7bc46242318698f988d6a0b4658ef0717929273e4b2. 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/QZK6N2271395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe077e6bbaedc6b06a66efbf8a58c49438ec9aa173ffb28e8b040f0e3132f4530. 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/QZK6N2271396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089f73aa905873a195b94321cc41173cba691674710c2cc82164b15696655424. 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/QZK6N2271397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b77dff72e80607a9f8638d202ae67313ad1aff9a0f5e443148e0cd34aa5bbaf. 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/QZK6N2271399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d4696fe7b647d73d56bf9789715a3384d7dd4b4e58b82e56e63fcac971ddb7. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZK6N2271401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d8d2106d90f3e43e8854963db25035bfa61a4f221b7a9f43f04efa47d1afa4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6N2271405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d15f4b26b97ece312554e4af271a1e142229524e1e0a376b40d6109d561500. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWV2277878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183a7af92233ef56f9a6708afb4b08864b9a5bc9ffcb16efa44ee8815b869a6d. Chain 2 (Bitcoin): anchored in block 958635 (2026-07-19T00:58:42Z), 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/QZHN72392586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa491001202b0e302f67806f044b8bc660945f966931f7b6828638f1c4f9790a6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEQ2319445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6c6331f2623aa0d6b5e74b619867ab94b91f8460ec3ce815ce0a96a954f735. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZMEQ2319446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cb47819a609aaa14bb02966052dc566ff2ad3f7d885d9479630e7801f0d31e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZMEQ2319447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335311b6b292470a956cb3e2dad8a7d4bed6de43d680fc5a29a081af190c1faf. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZMEQ2319448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de3becaf182639863c5502c8fd192a9fdb07f18e7f6c8073fcd52809d672bfb. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZMEQ2319451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc0674146bfdba419d80ab1013459ed882ed9acf3b65c14d064ee1df6f33c5e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEQ2319452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea345150e02963ecca08c2f42fb7a1c4a40df653d09e27809833ea4c418e626f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZMEQ2319453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2032305a2ea11cfe4bfd632258dc8947cff30cc6fe92cdb22210de4cb664ed5f. 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/QZMEQ2319454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da99dd938559ea3b6e9038501d6a565cb787ad190d6c7d21444c448479f99d1. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZMEQ2319455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebee1bf03751463cdca159e654ec14a8495e86c5faa0b380583f849ac5db7280. 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/QZMEQ2319457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3cb0d09d9573e1584f447027912027921ca8c970f7927d94b555179c010ed6c. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZK6F2487271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840c40c8d5b48d563b32efad13781499cbf23a123842fe27822fbf87747ab6b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFU2419155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c153aa29f6d47f6718b8d573bf89e437f68158b48c809f15bff503bf82bee7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFU2419162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67005439d64b6be49e1f673ef2b1a09183fffadfd623d639647d556618cd6e2f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFU2419163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83ea9e70c2e2778fd46a78d74bbe546a02797dcf6867f78b7803f2ff823a9de. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/QZWFU2419164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea08fecc9e30e84f0953301073fbb281e7f43600631ce1ad2cfc4cd0934d297f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFU2419165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e70b8b864375e88e14ffc3ed83830764316e02e4cbcc2787b8ee03ad99195c8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFU2419166.