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 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 0x0587c9d279e7040ac52a29b8be7f94dbae12210bcc368dca6004d7c9d86bb9ee. 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/6277cee4-5ad2-4063-9ac5-9bb01fbb4675.json and https://artists.proofprofile.net/proofs/artist/6277cee4-5ad2-4063-9ac5-9bb01fbb4675.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 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 0x303458daf6477ee45723e6c5778ecb7cf4629a36c84447a2326de9680af70680. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZFYW2131350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ab059d3b72be82467181b0684b8ce1fd33731faa8aba89bbbd00b033b5820. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZK6F2188042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805fea4f714969bc8d3d967308073b99d2c29270095d4419d9cb92f97904bdbb. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/QZHN42173387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc96794f0ebea92663c23d656969ce9841e5c5194c32ab6ba001f4c856494c2fa. 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/QZPLS2177962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5f6dc84c74099cdbec2bf70f63caefccacfccc6b560012ed38ce69533c96c4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN72279791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0471083ade8bf66618c4938150e06d71d17824b7123a3ac5e185ba0a1e9355e4. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/QZRP52294201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a583730bc3304f98402a53a2344974a99f90bdbdcb024bc60e2a04fe0778025. 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/QZRP52294202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263abfe2806663f810c95c83b0197ec701521f4ba0c9e9c5fd4e5d6c8cc35ad5. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZRP52294203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7133b71671c7f82d347aa98e7936a337b8a1b87a7e12e6c115e2318d78bd2086. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZRP52294206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f093fa120bc3c7b8eea62a88deedaee1f70fdd83a828fe2a66ba3dc084c1fe. 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/QZNWR2312634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53895dab88613d1bb3485bbdcf1a0e5710cae9da2ba7cfbc927be60d9bbf964f. 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/QZPLS2359750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de285f5cc113593c785db98522a0402915e6cac07d20031e9ff28aa80046983. 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/QZPLS2359753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5636256c156c2e71695aa86757f8c2976418bfa03f64c8477686512263513517. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T16:46:31Z), 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/QZTAW2321218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807dbc6f8fe5055b59a6419d11aa3a8bf2f99a54051dad84376b146ca52690cc. 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/QZTB22334123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5467da6e0a201702ff2434cfc63beb3bb5b5e1397eae0d33e3aa9a3e554e253c. 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/QZTBC2381503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f22cca6ee79b76525e24af35e9d119320e33fc78b870941176c3fd2e73ced9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFG2316708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd8dec31743f9e0cc2f349fee94a0ad682f96f78a8f2a50d43569dd2c5264b3. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZWFM2318263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202976979f63cfc2f9619e112e34a983f485cdb0f0b377057c4cf853523dd590. 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/QZFYZ2404294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe317aeff60e4e13efc02e21714cf883c8eb534097141e7f5dfdb881b30c02ed5. 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/QZFZ72411167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d24fafde21641ceda1631e8539950268491faa66fc825bff7e0fbca5a12644. 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/QZES52406509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0174d23aaee3898001217637b8e8da4a4df123bf24d038c99b88eddef674ae. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZHN42495187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56fdc00e257dbc69f247eb9efc0de0418377c10d1d7afd0b99e105f0cd17ee8. 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/QZHN92444940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abafe14984b7437881ee751318f094b4f226454edb92cfd9d60f7f5dcb9d660. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZHNC2432038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c0bf4f95dd415c735fb7c34169a0913b7782eb8cdf46e29a80dbe163cf8aed. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZK6N2405611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72299387759de8ef99e7795c12c2d81fbd77a6ec2d801a28eaf09efcfa69184. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEM2411110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca388dc69063875e5e0aa2cd7a200c5662888a42bb914505e22eaf841de39f0d. 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/QZMEN2442067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39adb5acfcfb010eed38d0f0f26c733371c6a5554d7cf79d9a37475742f4395. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB62483296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee3aa3fcc482c9cd015d0d009a69cf59f2701282da9708190f5bec98ec51828. 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/QZWFF2436334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b1b6cfe0a661dc74a346d56fa8a2ab7c5c197abe828233b35a0fab2cedd77b. 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/QZWFQ2453292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc41ab7d81276af5e7465a68a106df531056f97bcc52e49a9246e98b143d7548. 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/QZWFS2417838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86520a0b59deac5f5e8d955f9c2c1ab283193739bd7635594c40d6b273374345. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZZ7K2499875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed3316062aafa59e9c5d6006cddc8db27d4438910622448bf3735a1fe7da8c2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QT3EX2423442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64212124669ed7f8a0270f27c536ae287e2f869685a2afb8676831da838a4782. 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/QZK6M2587704.