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 0x1a937d8bfab7862f3a9125a8b0f4d1d193c840ae12803edb3a80b365919e1571. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ab81630-5a31-4f20-8258-99da48ae8186.json and https://artists.proofprofile.net/proofs/artist/6ab81630-5a31-4f20-8258-99da48ae8186.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 0x9c61b66165b8d7eeacbceb91377dce6701222a78ebca9622b36bfb1ea8143072. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBKQU1529141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e167ed476e4e63757d43ce2ab793ba45f2bbf56995c101597e4b95a9c0c6ddb. 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/GBKQU1557235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e77a7f77b0e20008dd9fa608baa148f3c7ee46b91a9ad89a87cbf2813d50a67. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:02Z), 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/GBKQU1582469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990fd3646d45e0221b6a831d906d9c19c2aaeddd0a38bc8fa2928196e304f0a0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU1672534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3302b4d84e42feb54aafcee546e7860f42e68b78c8dd7b038b8bf3a8ca269cb. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBKQU1724537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69441cb141efb9e1b888ecc2c4b9e87ff025bb1a72d977b93e56f53ed9501eda. 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/GBKQU1724538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12039967d487b05782407d79105e433c9c0b6f2b3760685dbfdd335485e9d31b. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKQU1724539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7d1f606dcbb3b7d9177d0d5bc01f222ce19e14bf65ce8f308df78632051cbc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBKQU1724540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c8017ba0300aec68213d14b2eaa0acc8d8a455c7484ef1c42f33d129fe79469. 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/GBKQU1724542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de97e8d7423d8ed9d66982a69e5548c129e5c65a6d98286cecd7a932a40a6eb. 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/GBLV62201145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b179b0b291b3772fee824d9537262898a826607ddf323caedbb1f0e76199216. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:25:48Z), 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/GBKQU2306138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b95738e84e3d868902de13fdd0f6327dfdaa88407ef848c78780e989a89e66. 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/GBKQU2390760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d11a2f01a88e2240f5f862657da18a10b1ea372080768dab5df2cbdaf40e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBKQU2390761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf46d20a908cc0d05d56ff28155f21520ebe6d41afd950f1979996e4776055f. 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/GBKQU2390762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787f6b46d45a1b090e644550b428234245e59b636a02ae8d4ba78f46976d89f8. 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/GBKQU2390763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e940f9c455f36b9faa6df983422edc6d93cfbb82774d7915252a98ef6cbd2b. 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/GBKQU2390764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d31e96a6607ebb685b2456ae9d0431c1ffb33cd9d8efb30b18734b57959558. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/GBKQU2390765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac86c7b848925452b6173dc733bd4877c60b6410030c1daaa97b6599a60f6f3. 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/GBKQU2390766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cec8df6199a4934194d2fec65f176c164dc4faed24545a87f032a70d3038dfe. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBKQU2390767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3c4dee8f924eb09c34140960e50d8bf128c21665d4acf953d26eac94dc6b63. 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/GBKQU2390768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35b8bbc4778d75480f6d3fc1ee628c315b23fd44dcc4ec30c291d25ef254798. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBKQU2390769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f9728065ee59dd27045110c6e6d68d322a0299b4591643c40e63c0a2f37374. 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/GBKQU2532447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ffe05cbee71bd8596ead51d33f805c27a5f80fa3a95865ec11b6f86455124e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBKQU2532448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab43333d36a894b6d24baf27007efe8291112ad3a3b8403837a7f1bfdaab43. 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/GBLV62216783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99cdc237803dd66e5068ae17072e6bb701d01882c284fb62ae1287b1b436918. 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/GBKQU1938921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ad9a0f551d0e6009f3a4d8d0a2d58b827f3ab9832267e85e3797706cb3b2fd. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBLV62216792.
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 0xd162d70b44c790377cdfc70a8eb8c6308bbf79ca59010565e19927e1a86e5c81. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBLV62216763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb338be8ac5cfe2d20a2e7b3606e9fa42df7dd262689f8410efea512af9482a10. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBLV62216770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf646f3ace948e83831b26928069d9325e65ac5cc535dc75630e49f36269e7245. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/GBKQU2295508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f5ed54f3ec1dfd266d3d548240671e7148c67787b52a977eea31f12990ff6d. 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/GBKQU2130832.