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 0xc4a9bbedda1de28acc60050ba20827408c429f730eeb16b88a34f776db064c03. 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/5f28be89-ea9b-4ac6-b853-db5fb5f8b6ef.json and https://artists.proofprofile.net/proofs/artist/5f28be89-ea9b-4ac6-b853-db5fb5f8b6ef.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 0xc7eb0c162fe5167cd26d4b84a98f3d130377d85b26345b0ae4e021828cd31c68. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLF242211366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50cec56cdf83a52c951b22c36a62a474aaec4d39b0cb4c45320ab9a72bfde04. 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/PLS901700055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2566292dd9ea25ac0e9fb0d3b663716b77ae1c23045097bae97e019a65ebd24c. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:05:39Z), 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/PLF242211367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8ff3cbe99b8cca29fe890c9c5a4cc992c5a8b029e01548600d67435e1473f1. 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/PLH442100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad042d0e01e6dbe2177e586bce14f714bd56b20996bd3ff10dcce441ee2df75. 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/PLH442100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a62843fadcbf8cad68c176b818680bdc7952b4187c41c4be31ff1e8de0d9f8. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/PLH442100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5862a1c0d7eaacd5273866ec00d076f4b7787327d6678f7e9130661d49db292. 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/PLH442100041.
Vatos (feat. Peter Gang PP, ŁYSY MTD, PeRJot, Arsen, Tadek Firma, Arczi $zajka, Kojot, Kleszcz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1cd2c061de74a844592f2e83a2e0917798346a8669fe9f0bb80eda48f82e3b. 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/PLF242208859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b4d01e9e8c4e61792bb374b2f280241abc16405bf08e4fd0bfaecec3dbe92f. 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/PLF242208968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb824905b1e6c47801d4b54c17429bd77670e9d49a59a71cfe01cea1b0d8c1f46. 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/PLF242208969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2583afb97c35c6f28e404bd6531d8192bcce36b454edb971476a19c91bf3ce05. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PLF242209979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7820119f9b4468d2b5d804cfe045c289b63d43b6ceec6da8cd1299552d9fb989. 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/PLF242210005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c5c35e2e97805d05c29fe02d33b21a25ac53ff9db630d16b82d259e66f9c6e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/PLF242210231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71471091dd5be798f4a180e4c2249d2a441ff28f18868bfe56f986be317da3a. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/PLF242210237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65c140eea98d091b9266fb82c6825c241532f681baf70153f5e9fdbf7e3343a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLF242210238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392f0d0698e94dfac1b5658bd669f98ef6c0ea0e849255ae93db0c7d74fbebdb. 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/PLF242209724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8efb4e9b0e60840d2aab26ca1a18c24f21529b997b0521e90e6e5570ba0c2562. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/PLF242210400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2c0ec0e4ce66b568fd57ee7ae700cacc2274f4c249f251416472934c97e691. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/PLF242210781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b1ef30fee72b1c5dfbcb123a8e618875fcc70ed0f86f6d984cb461ac551c56. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/PLF242211019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aa7f8152e21b87a88700dc3ee1f601506da55f59d49f8c5eb34cc975ef78c8. 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/PLF242211089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ed16e63cba24d3b8f8ee96d40188667765e483a816138fc597e1366a0604bb. 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/PLF242411847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece90432b2c90e7f8ceab2d1cbd206a48713bd045657bc66074fc7507380eaf5. 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/PLF242412272.