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 0x2bbb24ab646dab9f1a0d39f7112e55457de928ccf6cc21678e43f7763ba92e75. 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/ee710c6e-bc34-41d4-8770-0493e6743e67.json and https://artists.proofprofile.net/proofs/artist/ee710c6e-bc34-41d4-8770-0493e6743e67.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 0x7164c3a008f367feb5887ca521d486dcb8f95df881cdc96ffdfe0db0f24bf426. 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/FID8M2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x636719e180f0fb983ff7591d42da8eb978b2bf25315b7058084d532d4e29007b. 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/FID8M2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c09cc5656374f6289adc93e1651705c44e96a15726f23c4e7efe54cc3c6326. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/FID8M2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096ec8b99238c8f8aaaac0a656117abe476f29528f09de158dd6f64a6ea203cb. 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/FID8M2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d2ddc676b6be34192802c27824c643a0124cd32945f3b554f11cdc20ae07d3. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/FID8M2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096ec8b99238c8f8aaaac0a656117abe476f29528f09de158dd6f64a6ea203cb. 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/FID8M2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24deadb8a10977d0184e40adbbdf07b33092fc6f5b87e0746f8ab9b85159fcd2. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FID8M2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5520840c3c28ec8a2c95dbd3c3a7b272ce62337c9b613e1a308538e9af245d2e. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/FID8M2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510363bb55542369baec12d0539c42d0ffe5f5e75e6300b45259c1260f2e3e19. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/FID8M2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6709a386cdc39b32172190fccb49eeda1a07904103c03ae25e4d45889cb472a. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/FID8M2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0411f983c17528bb5cfee760a3a893ab1ee71912eb1aab0731cede2bbe4b0de3. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FID8M2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef45fb0392e4fd58f1cac3830ac23b8a62a4bff7e010d61fa535e033849cadfd. 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/FID8M2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1042dfd460e7c020e97a0d5022d0b9a1234a400e60638c09f972b176c8ec37db. 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/FID8M2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0def3d0cb0d2155ee4a7d581199a31e7e40b4736a8d6e1f650b9c817ca2b7068. 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/FID8M2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de656eea64fd7f4f263db3aaf31a7d60a8a6ef1acafff81c60ef647d99337a. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/FID8M2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b277b9edf3c20b7bae2ae0dbc81a7079bfca97af3fddd458c125a05ed416646. 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/FID8M2200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618f763dc59d22a5aa0042cf3890c3de4fea2308135acbdfd38724700762097c. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/FID8M2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e1206718c3a1e2b800f8c1629e1f441605163c62a461803d967597d910b4d6. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T16:00:28Z), 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/FID8M2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77bf3150b3c0f7f7e8e1cf31120d9b11aaccb63c00a72490e493dc563b770bb. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/FID8M2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a18b9b56e5d463e7a4b6ede89708754a1aebf0cf2b3f6549ae42a850ef7e8. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/FID8M2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba979b6594e95b5ef8849e9f96ce4678f4bb59f5b03ebfc33964b42ae94ef3b1. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/FID8M2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ae80480c3e34c5df19a1c5eec30de464f143ba3b7b54d05c5f3b85ac22e43f. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FID8M2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618afa3c8d930ada9c1b5a371729fecf9ce175533ab5d50fdac6fd1234115ae9. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/FID8M2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afee1ce99ab59d11907e4fc73e4cd8242475564fb39c59043e102ccb3563431. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FID8M2300026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515e0389bcb54f0fc36d1de12814ece6e9b7f80868622d118642d540b357b1f2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FID8M2300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3eae4f61ebf8e5aa5e9a2aebf9af763666e7b4420330aa31c1b23ada1b2aac. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/FID8M2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e4ac97c63ea8263f2fe63508c25899d05cd19ddd08c261652002852f7733e8. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/FID8M2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d0a0e5ce8efc849d67d2ac325d711934dbfee16d1519dc882d3f112b29d4bb. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FID8M2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838850a02446d8f9f3d3d8ad99a93c149c846fc9fe0985e876acc18128a52bf5. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FID8M2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489804f3e6bc0f46e84f51a8c3e3abe0b5525601cc68dbc834f40e945d0e58e4. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/FID8M2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76814d4fd49a5edf43f483cdd60b595a4f196f0239ad5e0d044d1a01e0f3e9e. 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/FID8M2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6c4948d2af49901c16685db91b03fddc47e856ec859faa2ad8ce4dde9e724d. 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/FID8M2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad516d21908461233cca36b31e0b308f44922f2b6bdee29d5318c5e9c8a4f223. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FID8M2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1039603395cc8ec57b717c2283fc1fa97bb1864df2252d69806ffeaa8d977e. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FID8M2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6789655f5652db6f9c344974fa3d4cf44d6419e95ca7f4fa253e54ec4b651c86. 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/FID8M2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f5a28afaee46c7495dcd86cfc1231f1b35f41ac33a0380eb96a4dea2defc23. 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/FID8M2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36d699d61ee247aaf2597588ba1e8af889afdcd009f5182472f413530dd864c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FID8M2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51f2594bcd800e60d9da74f282654f6770c0d0734a60ee01abd57f377293f91. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/FID8M2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad516d21908461233cca36b31e0b308f44922f2b6bdee29d5318c5e9c8a4f223. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FID8M2400034.