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 0xfcc92042ab2c84d656f38ffa126b46ed080467366dc49b74ea2ed3c0dad3b4f3. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/653397b7-cf68-4d43-ba18-b8a919b82333.json and https://artists.proofprofile.net/proofs/artist/653397b7-cf68-4d43-ba18-b8a919b82333.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 0xd7c8ecd147435f8b5ab228fc3bac3f37533d6d017e2a06f89fc5549f7b21b485. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBKQU2403399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee6d3468d57e7475d7d5e6488f1d1093fb986c2ca2e1bf23d952915677c1ad8. 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/GBKQU2403400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3402f6c15329e84ff7f994db64b5fac48bfdeaf0800395f5f856429a4f39d8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBQ2F2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d24be7c2b33a487a2d43237ecdf7c37f6c6d6ad7bbb428aa34aedd4b1cb01b. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBQ2F2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4741bc112da8e67b800690cfd3b625b7f6da25bb50a13f9f0dfba38856c8a940. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/GBKQU2430345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f6d333ff6fb0c1818509510d9ec6409708434b01f90c5d980c8f814aeb7f09. 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/GBLV62316586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9c7b78c2fbbe58ee9580b50fb2bb5276270ee306b5408c33c2f0e0784eee88. 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/GBKQU2348822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b914dba4d14f315812a048dbc9bb96b212e585aa61f48855e701ec7f8bd8cb. 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/GBKQU2327650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf112957ca1dd9aa7209f4eca69dfd0a52e39ff655cefef8cba265fb37d31757e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ITBHZ1500869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a5ba8bec890172f2fad91126b52c7674b0e7fbe272be9700782ba8f9d2320a. 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/GBKQU2250932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c488ba59646cd164870543c0969f02d356a43a084a354debe725e42861cc144. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBKQU2252057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85560944d144f22cbc8067e0a2f48e09dac2ace3e59463fa97bb1ac0cfb54b1. 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/GBKQU2237107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea3fb4f9268bdf2b988ed95dab4f69ef661ef74ea06f713018363ab5c38aa1. 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/GBKQU2212627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e5231295f0ab214ff51471aae8533c0e5f7dc34adc51bec1298421baa00592. 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/GBKQU2200561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71add59100b03837bed0993445878d9d8ffbc79dce5890588a2b67a46fdcb8a2. 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/GBKQU2196591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdade81b566ed226f19e16f2818358f8799424761048398908464bc6419d4c9b8. 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/GBKQU2146786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e5eb0d8ac7069f3bf96de02609446957a0a16ee1ff803cc9ad740ae9b6ac80. 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/GBJAJ2002003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a4c6691a86e6f9f1e612768b9f8d6da8df0752e84773adbdcf4d61ea0fe03c. 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/GBKQU2062412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd58c9b501576de2c400e80cd0da3c334ed5859f0ebe2b9995257c0d82fcc8b2. 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/GBJAJ1900601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0926b167455d0f1f641b46127c36810a3fad8c80d53a8b4820fb4e6d0034fb. 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/GBJAJ1900602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c82cb62123a6dbab66e255dfa6c62338474f35766f801b13af97161c24eab. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZF8N1884627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a9e2592cf713c7c59cb0a106c454ef44e86949fa63355b74682fbec8a0a1b0. 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/GBLV61704500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca1c54b488402afd9c06b12b1dd6493be06f413719a6bbd3e211e8f625edd43. 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/GB9UU1900011.