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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b968e2cea0da1cc16026a298cf8616c1649ed3e4d1034bb0db39e73ed661491. 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/f891dc8f-d952-4a00-832f-04316fb1fe04.json and https://artists.proofprofile.net/proofs/artist/f891dc8f-d952-4a00-832f-04316fb1fe04.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ba79312940cfcda40b801aa7c4033261b1f0e5e26edea9c148f8340cf12c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ART0G1805403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a987e5ec12a25dc3d7248a669f072a4f0ae27e1afbae2032af6f25bc44a8fe. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ART0G1805407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d7348f22f21591a8a9874abb5f01f0f96069c601fa5361f17a77cac9963731. 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/ART0G1805411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5553a6f4465debfe4444e9cf1555234cf2646a8208489ea25982633b6929e70d. 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/ART0G1805413.
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 0x2b1b5bd2c68638bd8936d80e1130086db1ba054578dfdf77d424245705cdeaa3. 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/ART0G1804406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eabf0a5e2fbe739cd4d33f221b29adf49c81af378b62e3ba6acc736c0e76564. 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/ART0G1804407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c84089d5b7835de2115fcd88016e3668a4ffdb00a592d7dd1dbd4f08accb0b1. 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/ART0G1804414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd07ec1b1183a611db60b866f257b7b0a22f17d2d7ecacfdb9b6e42df9d01e7. 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/ART0G1804408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d7ee419605b58e9e9af6c4728add1eb76261965e98e18199a90a5ab224db74. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ART0G1804410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11de063f91b2ea8d60cffe66752335e27578f73dd7ab08dcf405cea0fdd18d6. 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/ART0G1804412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6f98e890d3f3d7992c100f0e58064ecbb0e634d47940e39cdb498f4d0a29721. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/ART0G1804413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c161b4dcc005e67da66e6a760efa36f197cb3adc4008cd03f95cddf996cd761. 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/ART0G1804415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39515f66bb16024bc0907818536e14d12a0154948442f8b21a8e690ea901539c. 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/USA561055665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc716805f3a6c8ad718875cb8b42c3565c4a8989708631f8d2af5acfc627a2755. 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/USA561055666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49e04510abbd7c7df24416bcaa5e80bdeba2654a7c43b2a8bcea2e4ed38dce7. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T20:29:51Z), 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/USA561055667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7a8199feef235c93c4376b09ded6d2e35c3e4a380f504a071e5c4ee3bd628d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA561055668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83625fa924cb38fdfae92f5011c6f17aba47a7b4296a2e250bedd21d8add5f5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA561055669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f44896b6c70f29ceb791912bfb608f272af8c0bb65ef17a52014c50dfd8daf1. 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/USA561055670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa583730273f8b9cd59b6f58ad05a53a6c169e040d256329da0775aee56dddb27. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA561055671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7627495d4c831544b95aaf1afe3f01e9e9f8e1ccc6b0b18d0fcf43719d73ca. 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/USA561055672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3874d72b54b12a93f7e61406104bd08c77d3d7dcd4a96a5a62fcb6bce3b2a9a. 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/USA561055673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790af222e2921d7b6da5a934c64e1996c5009970736d8f5714f16c213ec00671. 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/USA561055674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ddfa4d84b54cfded7fca9e499b06b4042fc293ca11a0f7a1fb2d7998538844. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA561055676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f2836dd5a988004b1014e130e2de7fcb095a35bcb68b07494b46229ef7d8e. 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/USA561055677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2f8ec5cfe6aa3de82f1751b2b28200c053283afbf8d902dd302c3e5935c345. 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/USA561055678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbef46183a9839b25088bf14b16b9a5eb47d0cbd7c24d1586d38c786f05b775. 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/USA561055679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48f2c90a5bc4d9d814ccd836ae1aa36da35e084be85b1708bfc50866030913ed. 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/USA561055681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cf56e2b39b3d89f0c7a5a2711c57cb532ca0c5c69fdc15708945b8f3fd73d9b. 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/USA561055684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b4914e908533492d2a143df1a496355102ffc386f7e0a3a668dec89724a523. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA561055675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf300981e0e8111f503e073e8a48b190312defcf14a71a17c34dd5be5378be0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USA561055680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14235dba9ba7be638201e9f0ad160f946f004a2e3b9fed785fa599a2c11e54c7. 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/USA561055682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef619fbf3cf404429fd11408a6d46af9127f52b3f1830f3e7766e8b8012dde. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USA561055683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7628c0f64f76fd28df2398bbff243c377a234814e71bc18385987c096c58374a. 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/ARG991032040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9242450b676239d02e64825d6d72cfa76913ea7837778a64f6d369f1d5bff90. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USANG2035463.