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 0x6cfa7d40bd3cd06034d43d8495e9182ddef52bf1d06057350dab950cc9afc90c. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9c3b3ff-8ed9-422f-8e7f-c5f82feff677.json and https://artists.proofprofile.net/proofs/artist/f9c3b3ff-8ed9-422f-8e7f-c5f82feff677.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 0xaa9a83779e010870b51ee2d2a3800833c888587b7d87d9fe5a748ec571998cdd. 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/TR8100902817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791afbef76b246788324594463478a4bceaf766fd18dff5af44a1c1fd346c0b5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/TR8100902823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c69c20a46b6746e5aeaa622a420acb3a276cfb73846905c104ff1d6c893097f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TR8100902825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33aa0941fce7ab2c4f352586ce9caa1f3cd3211a0d7e3ff66e5403208e4c1ffa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TR8100902828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3c1f291e3fddaba6b99adc4232ae7e0798316eced8099dc721db98fd273494. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TRBBV1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45852de08a239aedaeb618d06b9288db515950b2ce7d2fe244ec5613395c5461. 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/TRBBV1700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2ac73d9d51cbbface199e20197555661f9bfd85e5173a99fd4b26668b50274. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TRBBV1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aa3444435eb8727293807b911b20392d2a0cc3bdeefdb4a771dace4058bcf0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/TRBBV1700012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688bcf3e4ccfb308126acefcb132ab6565da3e7fa2d0b4a25907821bac814c40. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TRBBV1700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f108bbe5ddbd420fd23eabcfac31c2932d11c554920a3ba61636e95456fd14. 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/TRBBV1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59979736858cde58824c7dc546a56adcb73a7c7a826cc8ec4318136b28748c23. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TRBBV1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3aa1a9d6e1cb9c01fd225005050f06958efd96c54b22811d88b3d5b0779ccb3. 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/TRBBV1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf1fdc1e9486790c416d1abc4e5df64d1518084fd8f94ed190694873c173aa2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92422919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbecd3a83bba2bc72f8ce9e6eedc030134edf4865b779e990e2604c90168595. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNJV2389605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadee825945ea94d694e9cd1937ab95bb721d9562260f0876b53221f4495060b6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZW9M2218585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283227b1a5479cdf04387d4a734a8ea23fc2c38b355e0c9e6a564e192f07bc69. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/TRBBV1800036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043678860d947b2ec7cfa09fc4368fc17432dcf9ae7ed24af6ee70d978cdb6ed. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/TRBBV1800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73796357c2b1aa37fa96c942e0579b0f083a61b42ebb86894271180077620e73. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TRBBV1800038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdc2c6ff26eb4b4945d8c44621a01816a4b45aeed75d7cdb6a4cda0e57fee9e. 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/TRBBV1800039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7977f81ee80bc3c4a17b6538a00cc767721ed85d7412e59c7d55640693b396db. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/TRBBV1800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c8d4e48d4ea0592ca2ea656360947e4074978673fdfe0d58d942954ad8d55c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/TRBBV1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe053cc97a88b82e65b34789a8a51347da9ffa7e0fc0fba7d1e2830f57d5f185. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/TRBBV1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0005ed0e3ccc058f88777f4bf91a46034bc1b400d3bdbe68e605d66f755b92e5. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TRBBV1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1168c4b04c16b454d4d48302fe69ded781ec4531a83bc00625f4d51a7d03b416. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TRBBV1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3846598dfed72b8e59caecccd835eb4d97273ce8b92554a0a6f13265faf607. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TRBBV1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7564ad2c56e194c682acfbd447eef6acb55127ccc5a743357738517edd5fdfd4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/US7VG2463459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cf838570f1e984d8364bfd98714a0039cc8eb17583efc4eb06ce045ae31cde. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QZW9L2341522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75de34fce3e500a7558895242d5b2083fdad4f5fe50057eb734a6fbf4df9db30. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/US7VG2463460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f42b5f42ef1d76c2e9758941a7be9b4d7751cdba65903060685a82ba2849975. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/US7VG2463461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf78a2b910083a239a871a85f4a083018988dcc7fb1817ca6d07d40494f63db0. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/US7VG2463462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162c71fb48e339ea008b515cfcaf70a264ec47f850cd1ea0bfb44596c87bf000. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US7VG2463463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbecd3a83bba2bc72f8ce9e6eedc030134edf4865b779e990e2604c90168595. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJV2389605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5035446c0e8a81ca9c27d0a37367065ab437e12964d3a4e903d6097021849ed1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US7VG2463464.