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 0xc91f475132834b36bde6e3e2b9accb7069d44ca514e1e1ee5bf023bdb5fc1031. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39f6676c-d7b5-4c68-b984-f5c8ef41744f.json and https://artists.proofprofile.net/proofs/artist/39f6676c-d7b5-4c68-b984-f5c8ef41744f.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 0xf8cc1048b16f9141d683e9a9d77c3107fa9ff8590de8b3235854736bdf6726d9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/US83Z2333503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc351d15677293da8dbe26278daa8ebe5b0a0fbd6938698672a85e41270eb052. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:45Z), 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/US83Z2333504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb2b596785dee726e70de0db705764f8323061b97589b76131b25a0cc83d9b7. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:18:45Z), 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/US83Z2333505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b45b778162c0644146fb5f5336d8e9eb4fc9e589a46826f7cb9a7bfea7c1da7. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/US83Z2333506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d503b304b0de1dd983c4560c67334cef1118261177c48921b850feaa7dee0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:05Z), 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/US83Z2333507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaa9f094d653cfed064ab70f299f9ceeea888f4b027f0be6b3674d6721d438e. 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/US83Z2333508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3218a11999d1960c1c2c44642bb05699238137ddbe12a12e48a360ec1d313a10. 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/US83Z2333510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0ca8a59456a30467626c2bf21087cb6cec26f27a59fbbb788368c37252d731. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:47Z), 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/US83Z2333511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fc50e96cbaec3d2b7ffe2f69bbc9bcafe94a873e0ca37af66d1e58ea53eb80. 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/US83Z2333512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567cc1102588e2c1246664e041c0eead1692aabfc688b5054f6cfc00bd4d4547. 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/US83Z2333513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5576caa74e96fecd0944790ffe89bed8e6ddae11bec0b46238bab7ff1bc436. 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/US83Z2333514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a20fd8eb4f079d8a7b8584f9e06d0487d5686bea1921bfc3fbca752bb24ffe. 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/US83Z2333515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa444232f73414133f74eacb2026ab6c4b05b18fb882b094c22d65eebf91f7ee0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US83Z2333516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376b4f849e58555806c7347f0fb3642ee852e9000621907831152a83b3c74cde. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:21:50Z), 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/US83Z2333517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176b3d270aa78155eba010d9634c3af656907a0b4af90e83c13768777104de52. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US83Z2333518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7446561303b2ca4fc9947f879de98ef24e4856a96d9dd45cf42cc26cdf74db10. 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/US83Z2333519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5789a6830d28e1c7bc0662c248933d6ca57937910c6d85676ddca4e93795a. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/US83Z2333520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36500abb63b4bd0f35145e60b3bb3a83396c41d343a907a20a9a62b4704a2641. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US83Z2333521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3885eb1365eff9c996e2e8c402283efff521376adaae472a6b594ee7daaba85. 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/US83Z2333522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0f76bb8174c0cddad33401a9494e795bf01be9012bb3237b9965f9510fe1ad. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/US83Z2333523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498e3bf8d6b3a23f241168b04f49160bf41c693b9d0bfaeba13d7005f682ee4. 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/US83Z2333524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e9b7bffd8d58c8ce2138efea0fc9424e874297d8856059af284803041ef050. 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/US83Z2333525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eda8b8345dfd12e2a0a15fe362326a0d2e8b4ac97d73316095bc4de9ddbe63c. 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/US83Z2333526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216941f53730477c7643c5624eb1c5323fb6a0fbee122bc1fbd3de7dc860db93. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/US83Z2333527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125c4769333c4daa0a4b9876e05a033537e6f7993012112dfc996f4bbcbfb8ea. 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/US83Z2333528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740ce80a77356e41d261c5ad47a3c15eb52438768b5342248758d8be9de202e3. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US83Z2333529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3335456ed5c96f67e9f5d878e589e4fa2321a5705d7ae71c2a6c9d5bcf9e0d57. Chain 2 (Bitcoin): anchored in block 958399 (2026-07-17T10:39:51Z), 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/US83Z2333530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c8ad081b71673910acddb45aa32150da44d3c434eae58239d99088aa6899d4. 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/US83Z2333531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351f1481673512cd76ba96c43ce66dce70337206c3333bcb70419eb744abd8d. 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/US83Z2333532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a90f9b47e21149d2d6cfe379d842b907a23046364070c389cc1402af3edf9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:01:28Z), 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/US83Z2333533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb18d290874091943a832767254d195916ba362d841e12a99700c97729f24c3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US83Z2333534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55793cbf4b3ddf87c3b17020a47b7acd2376594cfec50b67bb5d1a60d9413523. 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/US83Z2333535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e23c871e5272928bbe596ed16a35760453fa76ca735185307806a97a5c3565. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US83Z2333536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2704ed4eecbeab9e6b9e6cdddfb7428038ee4baa7d14f6cb6137878ce7b422. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:54Z), 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/US83Z2333537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c96888497d516e77e63d3a1437518224b986d6f157521dadc494856ba77cab. 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/US83Z2333539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04461209da823004cd4ddd2be7b260ec98cb1ddcaced1139bf32c41654356a5. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US83Z2333540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baf1510dbc3b3cb154b9bcb5d4fadb4b4f27384fb54c7a2ca09ca68d6df3d2b. 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/US83Z2333541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a41c9c482a845e697d3ea5d74f2fa5c501a061d5941f4dfdf9e8ef5a4527bbc. 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/US83Z2333542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbe88fb903bb7f49cafb328aa28a27650a84f9cbc92469024d7b42d9a8663f2. 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/US83Z2333543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9dd0b6e383d2bebe6939b655cc9885fd40689b1aab2dd8fb9db5d680c4db78. 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/US83Z2333544.