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 0xd4e8a942588c7e0cbec6dd34f563b87a0f231cf0bb28762d4786d2d8f86b7a20. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6539c558-f120-4eaf-b8e8-f3b823b567d8.json and https://artists.proofprofile.net/proofs/artist/6539c558-f120-4eaf-b8e8-f3b823b567d8.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 0x65dbcaf225d9cc61f0eb93f17a7ab7a97c57174c3ce60210045f3d5887ab8337. 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/QMGD71500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89093714286f7bacb6f5ead740656e00bc20f7c20d0a9b21da0fa6f07f7f318. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:24:40Z), 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/QMGD71500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e244b45f91762bd6733682e2a9d412bb769f3feffb94fa8ee985699a9928ab. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QMGD71500197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8f851e41311dbcbca10773e7fa82ab9cae248063647e04577e3eb21ba72b08. 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/QMGD71500199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86603f2535f2803f324bacd2fdba14bc0a1a6f8ee89d02fcfa240f2df0743419. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:39:16Z), 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/QMGD71500200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd5b6671f903ee640a53ae50ebbe5e183d03dfae3efeb0bb83b56ffbb6de9aa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:45:54Z), 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/QMGD71600278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365e125938869335e9eb15e7d3ce9c195d12bda5115210a85bf75ae84c232b05. 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/QMGD71600424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda91dd1e43717b728e926c202ecd09211711ff8b192714f1f271f8cee955f75b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMGD71700509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bdcc4d8e17ee6ffa56f9104df8a70f60b74846e7df3f810d7c55848e99343f. 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/DES871717502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260f1577464ea71ad6f7a9df09a2b1dacb1cbcecaa5f82918c9a87b8eadb6705. 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/DES871717503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e5c6020893f6e88faa51c7e265100ed88497dcd6a7aa1587825c8dfc5506ea. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DES871717504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf29b5aeb4eec135aefcb8c434e11385acca18ba616e6a845d94235f639a20e7a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DES871717508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0270ff08f6d579f1b472d7303091802cf6e77a2732b7d97ea651dc44a2bd468c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DES871717511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b2a1e39f422da0f3a32f0c5463b2b9fcfa00fcd2d159671794dac2d976f001. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DES871717512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502b908800ab6aebacbc08b375d822f1d4ba620ce88f4d47ce99b34cbd881430. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QMGD71900793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0815608dffcfbcbd9d1dd2cde3d2f760ceebd9cf7a617f6c020952cdcc42502. 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/QMGD71900841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ce3ec8ceecbeb034eea27d6e68af0286921b97451a7910e33091a786a65bf8. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DES872018101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe50b4701ad67f5f47fe85c5447e35d274d6999b8c37e97bb97a800a744f6e885. 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/DES872018102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71586242b424484d5d09150bfa37e95b8424783422a857d76bc6b746629f29ee. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DES872018104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd7e51f1fd61e866e3e522c6c724106e27e1808d64e6076c98a7bda46cef2cf. 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/DES872018105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5da3805a8b17c96ce3fc20267b60f1c9dcdc9287846ecf2a034a4f4d9f6698. 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/DES872018107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed1e6623156d3541865fbf32ba9ec20bdf2ceb65bc508ab15e2e228be7075de. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR3JQ2300057.