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 0x98fbce7d436e46454aa56c198c0f5ffe0fa4830f3759f33f49d0c067f7a2dca3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20ce42bf-a60c-42d7-86ce-c34ac77d53a8.json and https://artists.proofprofile.net/proofs/artist/20ce42bf-a60c-42d7-86ce-c34ac77d53a8.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 0x4b006436cc5e0949fcfaa265dc6dec7e60e1f87c9c859d86b290467ed6a36e3e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6F2010626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe72ad48f3c6309facacde11d0920c8f704d36cb61e87dcd9151376d6ddd0c9e. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZK6F2010627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03eb22e6d0d7a2f1b47496b8338c611c0a34f37eb6fb59a4139147332fbcbb9c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:08:20Z), 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/QZK6F2010628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f38694d946e7cd1af455ae1adc9fca9e14b28ca73b47d5fd59936f5f67c9b60. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:02:43Z), 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/QZK6F2010629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989c90d8ee5b90c4646a3f262ed438ab4115764be662910a795547e98bd55052. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZK6F2010631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5882552aa2c9089be21758810b57fdbfca29a353a2f3e3420301b7e66df1d7b5. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZK6F2010633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdbc085a1abcb8116717c51a3acca2a27347721fac8e6d344eec8f2677115dd. 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/QZK6F2010634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351874b2f1740fde3100f08c3691e8c238aaa17f0057d490847a09a284bf48fb. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZK6F2010635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df7b6cb7df95bcbc370e5e5527f0a4074c7359dc896df416e6ed3b1341d30d9. 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/QZK6F2010636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ad34fc9bb43e5e69358fdfde9a9fb19d79ebb5d86b70066626c12f30ed82f9. 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/QZK6F2010637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d351cfc910d6ad6ba37aef1c6865f5261cc9447a69aca77127010a50a2602cf. 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/QZK6F2010638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bc16272a637c7f9d533371d1fdf74671690646ae84dc87120d6ce4e3b6eda3. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QZK6F2010639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62425af5458f47f67d687a523f6818d1583fe29e0459c6ac3c7b4bda36d5b9d4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6F2010640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee946fe6ec1578af9c18dcb7cc17bf0710709f3ed778def5258a5ddbc3b35caf. 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/QZHNC2184525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa35721f64b99028b0c14cd5a4632f120419808f16b91cee2bef39e26e5f44fcc. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHNC2184526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1813dffecbe4b63db41cf9d61a958b01cc905bd183b66f374db13bc3c7663ec4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHNC2184527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff56552988eafb3ee12a816c4b577a7ea08f3acac0a9fc356e94951f2a90ceb. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZHNC2184529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7f1ff0509abcc94d9c4b5849e14aa0918e7f385ccbf1b7abc80f5b05989b89. 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/QZHNC2184530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c33016f2469221ac6f4a9c4fde173baa73eb92eecab7a8a8a7cfda154d04b4. 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/QZHNC2184531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2c055226d1881096c81fbdd8b1471b86412fa42a43c1b53bcaba1371b13ad2. 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/QZHNC2184532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150cbaa1128b4e6f09afcb7e505bad8488b888b2854d639f5180ca430f112900. 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/QZHNC2184535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a8cb1508ee22b592fff3277c2848b4933d26f403a3d4bc6ced9ecee3061adf. 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/QZHNC2184541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x253696583540ec0fb78521fc92a25238579f45c4a790600395976cff1bebb051. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:36:13Z), 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/QZHNC2184542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d1a1ed1c971af16e46e511c42b6e2fff48bb07e99f7168586190efb44da443. 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/QZHNC2184543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7ee6b9095e6ef8514f5784cfc1e2d3b0701aaad646372b39445dce60d21a42. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:44Z), 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/QZHNC2184544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e9381ebeb5c2e956b36d7444c738cfc4098d0bb1e7abf507d9accd34271380. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:17:42Z), 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/QZHNC2184545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb8fedc206b98dce46f472fb94fa5fbca0c7815b290a0d81b158a5f35109a5c. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNC2184546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53114c009a6e867c19ebf5cd3fdf5bf9e976edfa1fbf016fd3af7b6849a3df2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHNC2184548.