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 0x9de2b8ab30fec312edaadfb5b1808cfbbf65a137eb312d71f6a45401da94e6d3. 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/fc7ffd9e-8f0a-4297-bcdb-c1fbc3b50445.json and https://artists.proofprofile.net/proofs/artist/fc7ffd9e-8f0a-4297-bcdb-c1fbc3b50445.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 0x90dc55da38c28e9347e57395a4f10877e347a1bf608c7e65b26f1d3d422bf697. 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/QZES81931612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aaea99ec2e0ce2385400bd069a4c132645287e55b513fb9ab6a028276ce7a8. 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/QZK6Q1946314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4a37708237caa3fb48fa1ff85b15150837776ed522ed236d573da0218935be. 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/QZDA51959310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560f6a97617b7281ffcf319be7c0242e04fccb2c4bb6198da562ba441b98c00f. 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/QZDA51960345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316e67adf9fed55dace2373f22b0947aab45ef9582dc2ff22c8a0bc130269ef2. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES61977408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05ec6978c4e0bbd94216287537e77363387dea366196858fd91385db0cd80cf. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZFYZ1962189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef9ed3d73c02227925d5879d9271daba0bdcb2159e484938ab4f35de0853c31. 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/QZHN41969463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8d11f29e034d8a0997e442957bca247c558ff4e0343eebc1d68b3dc777031e. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZFZ72004119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d18f682992cbed94dcc53e617721e7271be473f9618344ee459a83e6e841df2. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:52:35Z), 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/QZES52002138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5c78c928e906a2b60671dcbc127f935266362f46fc14501c16ef2737718a38. 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/QZNWQ2021552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637c68ab22525e65176348f9ab293b108be0d05902b47f0aca341474bd54bece. 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/QZK6G2057047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e09da6eaacd587c2aebc1b1f73dce1b1d0e42325168e8f82855e51449f938b1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:48:46Z), 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/QZDA52148502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe152e7f5657a336fd6a97e5085405835c97e182418e34e57a3f336fb13e300ff. 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/QZK6L2122458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c40cbcb57c1c7a9204b7312bed503542c655bb2ea38dd2840236973d3c68323. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:23:31Z), 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/QZNWW2188326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c9634a0d77bd8d3eb36bc75dfccdfc588ea1664c4717bfb57a2421b227f991. 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/QZK6J2136746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac383ddbac97f5c9523c1bf4e678bfbd7c5e2535285f3197e19facc228366de. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:07:43Z), 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/QZNWZ2185263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd659312b600b946be6d35935396a1bd8f405adf95b76a72ad04f3f8bcf1e013b. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:33:19Z), 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/QZMEN2194362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a4c05ed222f82ef91c14c7578c15247c513bd02f9f8458a6fe801a4a8639ee. 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/QZRP52185026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59104ca70e7908e1144e14ddb0f4918afd63d8d5865dbb18368d79ad8131fe3. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZFZ22219059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eae16671c9fc0301403ee00b4bc92f5d4fcea257c6bfe36f5109558d92d66c4. 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/QZFZ72177439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ca0272b732b3aed0225fec9a54d1e8c5561c67e5aa934bcc81edd03020d639. 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/QZWDW2354754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66fdf0718b2e9d0841bd10b5a5ac452e71bc9fdf4c308be58a1e2ea1e21479b. 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/QZZ662334463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9845501a394fd923e8d0784ac7d719f9a703391f3cb7086cdb5dffe4974f64c0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZZ662334465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b493e9cadf2f0886363a83e72e54bbbbb997a721365fac0f63d14b77548a243. 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/QZNWU2440541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166f40d991740a3468d2833fd56a674b8ce87912e48256213ddee6eab964be2e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWU2440542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2e5e471f5c5b5c630bf72ed002faeb73dcfc7ebb367b279966c3b677ab9d82. 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/QZNWU2440544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3827dd09bba36e10839e00a854da70b0c856776d73c176269b71158af821b5cf. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:09:45Z), 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/QZNWU2440545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d5686437b7e3309d09b4347514ae4f4f14332ec6ef0aae478f3b0e0f2d0905. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:32:30Z), 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/QZZ7X2461447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664c66983c0454cdc74c442ac07600af9a419a2055c091300166a5e0de5e4e9. 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/QZWFR2578492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f8c562b2079d5726d0dddb64de59f878314bc912bb9bb2793ec7bf64af565c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZWFR2559100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dabe939406e37413df9b16c7a49a08a9ccb58312acfd292f985034d13b303a5. 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/QZWFR2567904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebc702b8027fbede4434539f1d69e32bc5f14bffef967bdfd2b7603028c24ff. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:10:04Z), 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/QZWFT2560090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cdc53cb09ab5770a0f744a527b07948a035b32320132141d12ffd3cd5c2fcd. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:58:35Z), 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/QT3F22552020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4984b919a2cbcd8e70a3dd7492293c74c7d6fa59a5807eeda6a9b7b02a52c310. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:55:06Z), 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/QT3F22552021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6d2e84c7fdfc94ed068f40fe61abef978e57ab733638d27a6eb3d87322f781. 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/QZN882185240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebea73e06eb3493905d2bd92cccf1b5fccb7b2da53d67bfa07de4a84d9e65e3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR96X2197543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d73f6e5a2c2d45d8ad895e79d754c476dc3957e96b24ea9c27499894630e237. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/US3DF2465671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d73f6e5a2c2d45d8ad895e79d754c476dc3957e96b24ea9c27499894630e237. 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/US3DF2465671.