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 0xd4c2658b02acfcb16700661407f91fd2f4bfb565c336152b29427824ce40f584. 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/b07e838b-f930-4cc2-85dc-a16d76253e35.json and https://artists.proofprofile.net/proofs/artist/b07e838b-f930-4cc2-85dc-a16d76253e35.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 0x880a5a84df6b98e75e6430cbe56e89ae518abbdf8ee0aee6980569f29e3d15ee. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHN71989943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254325b272e870e1981b4055ca2724652ad763ce79a6618a54b7c47b23ce4412. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:27:50Z), 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/QZFYW2035068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a3ef2704ef944383ec340a93658198c35790cce881062da3d0be4a19ba4b23. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:07Z), 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/QZNWQ2060451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a3ef2704ef944383ec340a93658198c35790cce881062da3d0be4a19ba4b23. 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/QZNWQ2060451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc21af00a8e5b3cc0b8cbad73cd631d7e67e97b18d8f7693fc69b57685942b87. 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/QZNWW2095143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db9644cfaf4b40b4a3c78bcb959fb07649a3572c038cc097682eeb1a82dfdc8. 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/QZFYX2179167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350a870bbe87f8d52d71f49380585df701164349996a2f1db86fda8138e69e6a. 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/QZFYX2179168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d35129f9bddf20f2dad777d7033806121691a2d5183f57f8ab483fe225dc08. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZFYX2179169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28393056bc9b3ac45efd78a3bd704522ef03e026843fe5cc994ae83124bbcaa. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZFYX2179171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77316aa82c48c850a17cdb61ef6f5369a95bf286858c7a146938c939535f8f57. 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/QZDA82192782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc59085dcbdf843e66e55a33944dc97b02c9af0965061d8ec39a4818df5402c. 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/QZHNC2128566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bec3117430c6171ea527bb34055db3bc148a93bdc2917d97452eedb4dc2f2b6. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:53:35Z), 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/QZK6L2155132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a0409d2b4cf08e8e4b838c31d0b38a84e2f9505287c912160289a8529bd3f. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:01:49Z), 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/QZK6K2196442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01637b05660ac1023af07f3cbd54720f6e8ffbdc5e4f21e2a11baf0bfb7e552. 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/QM3DF2154197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f4bceac26ce50ce09c9fbba18f7055e3bdf6597c27f692aafdf651a88f2d4d. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWS2123999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f4bceac26ce50ce09c9fbba18f7055e3bdf6597c27f692aafdf651a88f2d4d. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:01:25Z), 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/QZNWS2123999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f279df6dfb241ea21e9a2c2de04789129c72263a7de0cb8d57cb66f5a24392f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWU2184278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c067c621bd31fa0986568d72147c0abc377784e8850228dbb22e019448d09b. 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/QZTAU2175705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb4f93e0227106d7c3c5d929e4633cabd0fdd598c78070162abe956f1ffbbde. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTAU2185441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb4f93e0227106d7c3c5d929e4633cabd0fdd598c78070162abe956f1ffbbde. 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/QZTAU2185441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d7a5eb28868cbbe4cc7bb9676c9418ea77fea82362910298729bc428d96133. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZK6P2206035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9966cac6f850466d18e2d1423738499162500d080fa7790d3be34ee487390b53. 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/USANG2221774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf559d6a3c6d438237459234826a1460cc309a8e31bfee59c55d94d18e2553eb0. 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/QZNWZ2311333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426c29b1dd5e740c34b71ba35391aeab1913fd631081db95b772fcf8e2d8f9fc. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZHN82490089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54664715f1ec04611b09a6c3cf9293ec857f688f2735f5607b68b6f7c8966c85. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHN82490090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e676cfe349c37ea5f09528f5be6bb03fe1e4de92ee90f1ff5bf76ec7ce6ab4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:45:51Z), 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/QZHN82490091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcd11c04cc5d4309ab102060492877af52c769f6ac03cc6719b688b11e1d6567. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:22:34Z), 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/QZHN82490093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c18e1a30a1c1a192afe7ad8a70dac6b8079f02270faf3a392fe1b6e53ddb22. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:22:28Z), 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/QZHN82490096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc03100eb93ca1cd5904dc81ac17783614779e91c74be419d0d154aa68a4d8c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:49:28Z), 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/QZHN82490097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fa28bab14fe570dd8a3a84e264d6305fdec398d4ff94118b6a4340597682e7. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:37:54Z), 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/QZHN82490098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59ecf8c88acbce8bf8a95d9c3a83dc87019b7652825990651e4d149008c34e0. 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/QZK6F2492945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2d5f90eee490095eecc51deb1502118fb418b40344dc8fa9398a0c21f7866a. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZK6F2492949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275e3f217787ab0cd038b326c58f6f4718bc3af0917227fa646b4871b04f6a03. 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/QZNWU2416875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dae4a628dc3eac2e9c7721823d65bbe49e065c6be682b5fa401cf65495c661. 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/QZNWU2416879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f3877efc2b5bb2206f59d6c6a4e6ea21bb485ed2b17fe74c5298449ee13b43. 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/QZRP52468259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfced82de5d3788041ff7aa62d545761c22c8258310ecb6b144e7e066e8e04bb. 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/QZRP52468261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f2d16222a3981f75c122e3581d60c4fc476b40fd705f24d5405bb2921db45d5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZRP52468263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103f5009ba2ade2ab35a3e9eefd6921c66ead7938c22270ecf8538eb096e4cb4. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZ5FN2564854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940d933777949b6b41d14e7cf093b04c88bea065bcd738e64bb43de81eceb22f. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZ5FN2564851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e9b5cae7bcb8e8b95574d9b787ffad04b636117dcd95d55a019e3480b5b9ac. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZ5FN2564852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92a490c5625f565faf18efb241d07c2b9384e16cb2466ed48bff8447b9f06f7. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZ5FN2564843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53852a6506539c797c1728b9935793da9fdbdf825333b66fd27a0d999ae7763. 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/USANG2058280.