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 0x8ac855ba80ce879e61f81b22e13721157e145a0997e23112a0b4e2a5d9da11cc. 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/e4e1040c-d76f-413d-bd72-939706024492.json and https://artists.proofprofile.net/proofs/artist/e4e1040c-d76f-413d-bd72-939706024492.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 0x496fd2da13558a2f37617278ae8e7e2aa213b7e7aada5269f89ba9527fb0ea70. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCADZ1896414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccceb5d3303192d280133fc26ddb7eeeea71987807b6a33932d8bea11d6dde2e. 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/TCADR1862177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918ec5d9cfa408402f0f94394cf69b19d70adbb0d337c2a7ce7dbaec36f94a22. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCADR1862195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe457cc188e7806360b98f00ce29c18d27b2efd15486b2b9e547e134b21238487. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCADR1862180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d0d1ac7ee6aeb2218a9554c1285dc0ad4986fa0881067cc9f0c4956cadc9d4. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCADR1862193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af8c490caefd4d7a5ea313be7038300337bb37325265ba72f71994fb8abd2d1. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCADR1862197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781f89c7b8bba60a8ba952c06e31a639405e3fb8617f1896a7afb1fbde842e1f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/TCAFS2121860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0e6179541305394dd1658e6ebd4729a3122516001068a15e0ee1ae5a2511f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCAGY2344901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78854717228d978edb34e926a4240141eca3de872de2e6af7e3e9880b2e092ad. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAGY2344937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f60f759a1582482503c63d022e373a0f37d5545a1680b3663f1af44507f398c. 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/TCAGY2344986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11e3d8075648a5306d350267da64b3962d88d351b732df6934864967db83ce0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/TCAHJ2329967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725fdf38afe05a1c23e9845e880e6d45c5fdcc53df542556a2ede70afec9072e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/TCAHJ2395041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f254d303c7ff216b9a82c36046aba005a181fdf7dcf196f7a9b50d34a44b06. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHL2307773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b93829c91e3f721b77ee69fe83bb418674508577fd911d723e858eed2601b75. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHL2307857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a79eaad1d708dcfc0e450154c9f03fd9992270eea64cb837b52384c502bcb6. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAHL2307888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee0169913129d17d5c827d529784d77228763ca38a6fad62ddb8ed239f8ca52. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/TCAHL2307902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eda357cec9719f7d67f57ce8b39ad8c0fd1ee0deb08116b515489b8fe1a1e20. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/TCAHL2307905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0c08bf9a5f10413271d3f2a626526fd226dd2dc0ec8a2a4da5ad31e09b4e002. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJQ2565086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b7f0ba11c428a4bc4866df3fbe2ddbe47cfc6a6121eb41c4b855bced3cbbba3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAJQ2565245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4424fbc55a7d09d49e82128058d921c3d5722059e343d8113f5a915a3b6079ba. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAJR2565282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fb86738bc458f3faca85b55bb2374d70cbfe0c1d16d4eb4d27408bc876cceb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJQ2565404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323ba7cb1580ea9ac4c8a0f000d4071e3ee4c681d003f0b475c429e1b7a58bac. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJQ2565490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e52dfb9b7717b94a953ec4cd1a3e51934f75b6b76fc15e244192727bd686ac5. 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/TCAJQ2565520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9271fb02be10e27227e6db802461e4456a3b1ae13d5fd1acc4c4abe28dc0cd. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCAJQ2565532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f65eded6a21c447cf9cbb77277acabc6e0aa83f559066d5b8e65b88925fce7. 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/TCAJR2565546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152791505f64486fe87763e34558ed07d5aab5745a620ce3eab7e86ecf6f9df8. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCAJQ2565560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d080c8a804db62e8057f4d485894af9e5dc815163ea07426962936236bb166a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAJR2565577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd4e3b3566a0e21c74e82abda855dbbfcbcb0d7f551e4ff4204b966bdd11fed2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAJQ2565626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983461eae72161c87385e26df8e7104cec9af1f437a4aaf07bf188d3ac2647fa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAJQ2565651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b778c67c79a3cf276c746edb6c0d613cd59972ad005881996c2350bfc07025. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAJQ2565707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc938757bf1f68eda3c91b1e46e000eec0bcd79d968e0897aec657b887087cf. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJQ2565756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad603dbe43542e013ebd00462faee5c96413306bb9b4d8bd03e77634b49bd951. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAJQ2565834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1309a6e8abd21f509d47f4212ad42ca106735691d07debf1ffca105c4ed18f32. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/TCAJQ2565872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b2025323de185b387ba8f587f82c35d84d9758170a3ea87d5f25f8326a40ca. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/TCAJR2565891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3576b34a7a7ba8c4a0865422ffd8045fa43a22be3cb86efcf9bb853ab159c771. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJQ2565913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129fbd1e35b57958dc598e5e7c26dc06b4e7149b3754a4612bf9b168a071f98f. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAJR2565959.