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 0x0edc8e44c7c82adf1b9aa2afcdea4e82bb248d771610628392b9523ba0a25cca. 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/c3d1afda-d87a-4c2c-be7b-aae49d470b5f.json and https://artists.proofprofile.net/proofs/artist/c3d1afda-d87a-4c2c-be7b-aae49d470b5f.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 0xafee791d7b33135019c93830fbbafa315ad866fbcd1aa3f95b533f6055c1d32a. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:28:39Z), 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/GBSMU2140880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x388c193e2851b2219edb7664628f69a5cf9c7cc5c4867aaf454c67c019eafdf1. 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/QMPKX1640230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9091e5c4615099eaee15ca9fade4c1f094f80d1c1f6a42125f3574b48580fc1c. 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/QMPKX1640232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7b56d3797b3e4b7fd707897a2525f7b63d6030221f616967be7c94ed660634. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QMPKX1640234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf050dd61fbdcc7303721ff650f9b20e79ae3fc0eb9e3ca0d44834f915c034e97. 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/QM2PV1668504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc615cef05e9c2321997659fcf0566013fcaaae2e7ed2b84faa69e0eb485827f0. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QM2PV1680484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337cf737c02a161b9fc99b7d8107eec12c69edd97e46cfbfc0646322841ad0c0. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/QZ4JJ1702628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3112e548f526de4b85af78cc89248454de81196b40253514a60fee369f394fed. 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/QM2PV1786184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc183fb6a157e52202ca9ab3dfcf6762ebb46046d7d1f9f572ebcd70ed8f41d1a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZES71879090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f6917eb514fcacc266d437cd913d8477234b586d8dc1d093b7bdd4e9735e83. 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/QZES71879091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1651eaa97fb29972a462b71ddac07d1ebad848118333de463bf607867ac39ddd. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA51910347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725c771814cbba6215541949036037e47bf5e399dea5516349bcbda9dc988516. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZFZ21909212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc55a2d413ee60b4cc64ad44ae327de5ec3d9ef089470341a70340c9e3e78b5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN61943707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d62900e666ce0cb9ba8e31b07cc6ff967a82d63bdae716b3e6d4327475bc278. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/QZHN61943708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f9a192318b95c3a3df8267846ddd8d25f77532a5b95d0987281194ce24579b. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZHN61943710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef7428f14e9fce3cebcd13d95228c543c3298d10029966840d9160429d23a27. 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/QZHNC2010614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1118175c922c2fb311b4788d61851d3b6d0d93a03dcfba4cf7208a879de389a8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6P2012138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe0fb0c033cfff31750462ca85ed7df370a67adf004269659cd6670f40300f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NL1LE2102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf910ccfa908daad99eac5a7e55bafa62884807c9bd1991f539602b37cf3253cc. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZMEP2185504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f0d64283ce0ddc8dafa85479ac3311bfc7f710468ec1c5c14c2f7344dfcd34. 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/GBKQU1916716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f0e4ab872f7a858bf53788e2d2a7d093adf6599f0d200e9207b30326ca356d. 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/NL1LE2000768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450ad421a7c0127c53dbc2e08dba93cc14449859f20db9542e721a1762ea6dc2. 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/QZH6S1900451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd325e2e1a7d8e37cda662d8197a0b9bd86d345878b72f3e9476c4266d23994d3. 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/QZH6S1900324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8661e71953739d4769ff3c0641bbcab6bda06814a59e0769d400757d09a6e46c. 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/QZH6S1900325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c65f4d246768ba62287cf10b35de920be3dea4912c05e1f089e965d2849cabd. 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/NL1LE2000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa782b2cdddb7c7e90c73cb3793a6897c410a744764f0c598c739abf65121f179. 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/NL1LE1900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffe0fb0c033cfff31750462ca85ed7df370a67adf004269659cd6670f40300f. 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/NL1LE2102110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359b1afff85920531b9933f7b56272b6853d838308835081ac30a976ea78a28a. 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/USA2P1950981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f622b0e2b9ca46fad31ce3b9915b84e4410072e1d966fcdfba6eac40537d07d. 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/QM24S1922482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dccf556410aeac1bb9771655446e51ffa82a7497062394a2a7571f4d0d2d75. 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/GBLV61802825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1dca90bfd0d1c1c9f68fef08bc5ac55b2cbc12d7941fbfe7e186990ea418b3. 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/QM4TW1834163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d92bfbd5c12ed7fe8dba98e740147584d686854681a3fc0cc69896c647e5658. 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/NL1LE2102444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f0e4ab872f7a858bf53788e2d2a7d093adf6599f0d200e9207b30326ca356d. 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/NL1LE2000768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1dccf556410aeac1bb9771655446e51ffa82a7497062394a2a7571f4d0d2d75. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GBLV61802825.