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 0x363dbdde71aeb4a6d783ea64aff67f2acb818acb6fe5b7d0a3a624ac94ccf80c. 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/499bc8af-09fa-4bb3-b858-247562bb14ab.json and https://artists.proofprofile.net/proofs/artist/499bc8af-09fa-4bb3-b858-247562bb14ab.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 0xac9ae52bfc196340598b1b28fde2dc3e8791fb3bd946fa8af49dcdf0c07b4b8f. 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/QM6P41943384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9428bdb7a521aa1a83644ddc4e31c5860c8e9df0eff4e7c724a60271c34ae8. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QM7281984607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845c11920d4a092a905955856d4700191bc796a5e20c613ab0f075685e99c713. 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/QM7281907092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa594ba28979fa2cee66290ea5002a0b968c0b1cf998ecead00b2c7dd49ae7b0a. 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/QM7281984846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf75275f0e3a474e611334a0144fbee2cf189cc445e8ae948a8385516133b7ffc. 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/QM7281984662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfda8f236663c5e4e5c28189938cd48f0e52d150857b3e038168d28dc7abf92. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QM7281984668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772e05da1b618e218f0d87fd24f50086af52ceaf7d6f467023ad51272a991f77. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QM6N22008359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e639757da9e5b22dc36313fd4448704884bcdee6fdea012f64383da5dd64457. 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/USX9P2022634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e9c94e7b7c869b5d73e18331bf321f74ea048f92a1a9fa78f4be14b7a8c53e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QMFME2043717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f631238a9b403726451029f0654e529893f31952e47637a9fc67170779ecbf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QMBZ92064109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb154c1214ba254622ac2b2cf2a8d187f206633e1a58d5b2c46d817779ecbe099. 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/QMBZ92007924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c635f21a29f3246d9b22ad9d973d786a69eae0f3e0c4d7ba06f601fe7dafe3. 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/QM6P42068610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b8f48d12a3a1d6f81c38f0cecade7cf8a697b087b0224b2cb64b05e4fa8a7e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QM6N22007938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a0045ef56e89fc48ddbdabe52e25f3c870ea19235f5bef1f0894c055dcdf17. 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/QZTAS2163543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0c547adda18bed0f18b033ae773e00e2ffd52dd6683e3d769b1701ced4d9f5. 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/QZES82211497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1806d73aca8ef97fc83e83d79ef14149288d838ce99bf4616b42961e4f5ddcbf. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:56:32Z), 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/QZK6Q2285907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd0f7e8f2e534e5944a476d3d4ae16517e2eb05624390e3186d1cf01a4e0165. 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/QZFZ22235482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a0045ef56e89fc48ddbdabe52e25f3c870ea19235f5bef1f0894c055dcdf17. 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/QZTAS2163543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46acf50bd5eaecc60fa1c441cf86cb6594c82021047aef897581c9d8c47c2d3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZHN42411158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9ab2c38d661dfb68706135fd130dff726a19e147fc8773e1adade7a0ca2f42. 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/QZK6Q2477059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ded5dfb590892b67f9c3cf8913570bd41ebdaeffeae349e17c60c0e683f2f. 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/QZMEQ2480141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86beaf13eebf930be4739e3715f395e3843359bd8925d162bb2063fc0376f6c1. 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/QZPLS2482248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fa172f5c5bc9f2dd931c8bdbbd313b72c805628c2cf400d62b860bc6424051. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/QZNWY2488944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4587344c9340e5adcb2959121ddf2d7204b2bbac76769d20ab02e863434081. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:06:23Z), 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/QZTB62431424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9ab2c38d661dfb68706135fd130dff726a19e147fc8773e1adade7a0ca2f42. 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/QZK6Q2477059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98ded5dfb590892b67f9c3cf8913570bd41ebdaeffeae349e17c60c0e683f2f. 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/QZMEQ2480141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46acf50bd5eaecc60fa1c441cf86cb6594c82021047aef897581c9d8c47c2d3. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:06:53Z), 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/QZHN42411158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614835dce5b85bae562c36fc099a68dc2fd2a574c79e17317ee140e5a6861115. 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/QZK6Q2016147.