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 0xc012d53f3fae24775b4ec248db4e93f1a5be6959f69b14d5df3bef9bae64ae67. 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/f78d00ac-1e2c-40a3-8e48-b5b0921f99ae.json and https://artists.proofprofile.net/proofs/artist/f78d00ac-1e2c-40a3-8e48-b5b0921f99ae.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 0x8e18bec716784abba134ec2043c1d148a84f0309ddd1a293de86d4430206a5b0. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T14:57:50Z), 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/QZMEN2309603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c3271c0270ca6c6b1903e19bef20811105cc79431367a475c7b4ac2a72b577. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:19:27Z), 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/QZMEN2309604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a346f090450f49b41f60c9a6ee31ade0654458ed0e1b20df414e60eb671ff29. 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/QZK6L2367290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099d86a050f5c5589cf015e382d6c3f193df53ec1136c645d42136bafbda19e9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEN2309605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9696eae9e3f6567a12c44117f9ca43807df6ea185663735bbe26c6cd6cd90d. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:44Z), 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/QZMEN2309606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775647f98ccbdf4ff8a80bb0c44a26b28a9bbf5b63bc675d6ab45e2c3afe4ec6. 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/QZMEN2309607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aaae437127ad35e9540ccbd4e64121f8751cf8b1e5038f1faaeebded43320a5. 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/QZK6L2367789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe613860c2eabcd946374dd0d3e7140ba3d480fd1a91d1e91b77913e7dde8697. 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/QZMEN2309608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb408efccd21b7ff58146ae8bf6c6510b297eafe3f2f7baa43675ce7cb5719601. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZMEN2309609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9de5dc7a9d7bc2aa49f8a769499fb944e1816685b5b5cd4cc5d5c9e092e45cf. 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/QZMEN2309610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc05edea029968928bdf6a5976a292d84914982bab3f9dd25885e2d0343aa4b9. 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/QZMEN2309611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36f3ec54b3c2e36a745b1f1e557ec245899c372664e5f68880d051f9a695085. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:59:00Z), 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/QZK6L2367790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c520638fb0c0b18b4fe00155a6a655ab58c7a96033a426fb8ed09aee8eece07. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZMEN2309612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919712fa57fc8d5c35100796ca502769c13ef082eae961cb660cf78ce1a76923. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:47:46Z), 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/QZMEN2309613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d62fc843f7c2d6aaad811f8648944c5169a5bf46cc41c4a0a2daf3b8afe0f11. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QZTBC2365729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f19f518905d1747916d8a75de1baf41eeea62c6fcdfd62c547e811b5602547. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:03:04Z), 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/QZTBC2365731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee5ca2bd61a3786560081ab796819edfbccf666b8f607209d188cd9c1d0710e. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZTBB2320222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baefc850ba747a7bf6f0be221bb6cf3a5598503a13199c6e0161fc006e76762. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTBC2365733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb8e4e4d3f7baa49b12df3613e68ab326c1dc6e509b444b4d543c4ffd7a7fa1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZTBC2365736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fc440b785d19ae70aac45109606755cfb4e872c7abff6fd652576302b3ad98. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBC2365739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8811630320ca1477e8b9e8617851af2c0379843a24b340b68a6bc790b75d871a. 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/QZES82412294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabf6cf06321f66a6d6789018ea76f6b70f38a9aef211a2803ea8201ea7edcdf8. 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/QZES82412295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58769935095e18aad750094835094d13465057314bf35a4b1a1810a670d54690. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZES82412296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c88e302a5a9fdd2b5a8fe31cbeafbb64a000e8c0d984a864b7c10df9a28bf81. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:42:34Z), 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/QZES82412297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9b7ba5dd84f4a3d958c4db5683fc6397c1b6d9f44f02eea1a1df7dd36a368d. 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/QZES82412298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d951f9a0f09fdf96d37098bf8bd997a0e71c90825dfd800f847c0ef957c6ed. 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/QZES82412301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69b99cff86d5d9393bb30fda197fb19388d74ce04efea40bfa9ca018d1a12d0. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZES82412302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbe748e83d329cde9a25b8cf9c17bb34224fd3194381ef9feffa63e39ef2b7c. 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/QZES82412303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a0aedef858e9afec6055c8df76f57466c27568e6fe8ad7c476b68b0c147724. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZZ7N2474532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bc85c1e98728b5a328205d147b0010535af5c27f17a51b3f761e9bc55860a1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:11:24Z), 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/QZZ7N2474533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80833d1a277a57f6f57021c7bc1fa9e74ed796b8764054be2f8c7d14aa8aa43d. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZZ7N2474534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9e8a91cf735e292cd29ab7278b74fecc56bf94bf9ce6dcc39986c431096c3f. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:22:00Z), 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/QZZ7N2474535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f9cc129df88c0c6ec417babeed830e115debc8536b2f5b2afe2af50841b989. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZ7N2474536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a834506f1d38b597cc837f182c3632cdae5142ef58bd79f016756042d07f889. 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/QZZ7N2474537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3996080bd97383591940c29406aa5dd2877c26edeedfc162fd77cece99ee5a1c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:04:59Z), 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/QZZ7N2474538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985f3fd5c22aec284bf8075577a4fa7934ac632bcefcd622c1b5ec9b2c9a9677. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:08:43Z), 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/QZZ7N2474539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e6b22f09edb32abc3b9ba000049198fafce35864bb572a02145e1571b9993d. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZZ7N2474540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9674c9e82fb15deae926b756ac7ab4179f25cee0f0927853dd9a55103663a73b. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:09:25Z), 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/QZZ7N2474541.