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 0xf61b911a473f22321ab4cf276cf6371d00850da454d4b29479a56dcd8db7771f. 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/844613f3-a3c8-46a4-a9d5-ce15130fbecf.json and https://artists.proofprofile.net/proofs/artist/844613f3-a3c8-46a4-a9d5-ce15130fbecf.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 0x0dd4f2fab0fbaf7806ffd752e9cef19346846237c07df3b63fb993d7fb9d9ead. 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/QZDA51842408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50d965b89ae5053e431eae724a23790afc77b1abc64390c83c52ca14795b043. 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/QZDA71979175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7ee90b8b8683e8df1eebcd8a71aac4e2d6b7ffc6b1a2ef0d3b52d04612027e. 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/QZDA71979176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e6e1120644bcf3ed4d3b9688b977c818508838e55619a22c8828d3d290ad07. 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/QZDA71979179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90722e242578c4bc085db07a32ea90331efaad1e419a7b418ffd3f8377d8ad60. 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/QZDA71979180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b66a03eed42cd802397f00b0f6faf64f68e7fa9082cda81fa0e73a092a30da. 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/QZDA71979181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cbc3f2cff20577b8d13134168a65dc99487134b4960a7f2985729f8284d2fe. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZDA71979182.
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 0x24e7537ed9352d2d87a516140b66a6678333a55bd91da9332a349178f9d0abeb. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/QZDA71979177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55dd21d1c61a28916af3e3aead96e13985badccc34ff0f5a55a672bcc3e59de. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZDA71979178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee26c1ade413f2d8799b67da1d44382ef83ebc6df82a2fa1a9fef4434d0d107. 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/QZFZ21942984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe550ae0f99357097901fd9753884529f3373b1ad0e2c22d3f366b54884a46b3e. 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/TCAEM1967413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55945a5e6568fa141ccc81ffbab003abcfb12898a6111dc0704b39417205c5bf. 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/TCAEN1909724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff73e6e95488e7d576f9c8da6f680ca954dbe08b0a25098cb4e05b4cb3a834bb. 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/TCAEN1911574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c4921d3affefa12ca85ad6bd6d296af087ccc24b85a98b6a217f9691591148. 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/TCAEN1909719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb0e62907fd6aecff13f1e1a521223a897874c985461f98ccdceb4c120704c5. 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/TCAEN1909718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6617f88891d369c8cc4461cd32046bb1c2414109257faa3fda319046e1dbe4f. 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/TCAEN1911554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8aa796595ed74b863e26aafa3a291c873e2851d3dc609e3fce85ae0a11040c9. 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/TCAEN1909729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b4f812a72c2b78ed8863f47bb3a0800e88abc3440cbd45af8d490ab8904fa2. 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/TCAEN1911593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2aa680f3d3d7d7098adea12cd51cb3bb6f5354decdfcf65abef3ad8451ec98. 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/TCAEN1911581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0765b74168ccc56d1bebebb9162b355992f8e3d6789c602569cd4d7c084e0724. 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/TCAEN1911585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9c5d83503ad3e852f183096d8a106f1b57098a3aaecf7a17ff632eddcb45dd. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/TCAEN1911588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a51ff1877cbd802ed8e7afe1ef69c73f523a254f6f563c77a083bcc71f4f34d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAEN1911551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f8d73ef0a1b5648e44eedbee6a108d88f7f47dec684206502ac7bee588e4d5. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/QZMEP2013038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc69b3bce12ffb61f4f92d5e0d792dfb60e273526a4c17903ab14481200ca41b. 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/IT1O72100712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d0321508280e665a2400e5be46b0a32162c382073f1edf4bd5134532394ceb. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/IT1O72100715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a3dd02ff314f71ee79472b5adf9366a086f8e4a37dde2065b0e75f0b658901. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:22:58Z), 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/IT1O72100727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab16df92a8bdac32591d4afb20e1bab231b0f4756e0afd3bf1ff04fd245bed31. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:56:15Z), 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/TCAIW2418068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a993f0d9a519ed2d4ae12fcb2977b0b52325861309ec83c0f17afe64a6ee91. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJZ2562654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ccc937ea03ee3d5b94e27a6f443dbd2177f0aade46f42b7bf8824f43e6f848f. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ITZI71800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a0d425f46b147079ed65fc025ebd48da7bfbba52f3866809ca36f250f08d77. 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/QZHNC2007927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07975583333b22a335f14e7d41435c1b8cff3b076cb303ab45246706800e6766. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZFZ31924658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003cb9299189e1dba0f061bf5635f21378339bc7bb4aa5f69aa97066d9bea6c9. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFZ52010626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd4045235741202261bc168e42d4f7ee8cd81fbc54fb17605fa71b254cde485. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZK6P2181210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf4a5dcda5a29ff25a4ad75d48309a34d1c8adda7a05648120893f4f51d6a4a. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/QZNWQ2059000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f29cf7cf2203dabf45cf356a4b6b1e56dd59eca3d10b45b75cb32b8c3cad30. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCAEP2036439.