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 0x5087f6bd6a7da03f46721afef550d7d66d9a88ac662b00eacf401a4ec0f9431e. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54951a50-e48d-437c-ac19-6bdfb2b3c86c.json and https://artists.proofprofile.net/proofs/artist/54951a50-e48d-437c-ac19-6bdfb2b3c86c.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 0x5b1325a30663f4d351b2b964a408942c53c212e51640673dccdaed1c058cb0ce. 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/TCAIC2447328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12e6a1f20dcd581f172f74024abb3c6c62ffb1dfe759a98e648f65017faf2e0. 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/TCAIC2447331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1ad89c1733b93099a88383d75478a4f1e7eae5c5a1e1dd48cda421b833d0f5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIC2447337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb0d1a493db84eeecb8ce3d8ec187dbbca13c460b5beb09226653d6d3f4d250b. 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/TCAIC2447345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc0cc836aa6f2cd0ffb58ad78b51e0b39d01dcf7db61a5a82aa144dab1aa7a6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCAIC2447356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c706f412a8a1ff57345924325953d8491fa15ccd052bc3025c8c78aa832f2aa. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/TCAIC2447366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c4801f45cbf3ce824bd23dccd92ff974466cb0164d148b04c19b75bc8fc6ce. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/TCAIC2447373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f3ad0b327e439d3815c0c113deffe41b61f42ac470924f3f1bf8f9ab28a376. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIC2447382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22f8099e1baff29c7b522b23bac662e0bf216c706ca266262ef4fe94f51c3cf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIC2447387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d398f217216dc667cbf8258cf46ae5bb1f176a7829b8e9bef0171d26a585ef. 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/TCAIC2447393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fddb1f49ac9420ef1e2e675d4faa220a4599ba55631837a051568fb1d3a4df. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAIC2447398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1839dda667e53e89bfdf8318cc3b65602ffefa3941290e11d5f289b352143d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIC2447408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd591b5a83f23982ea8a9900adaed3f5b464e7e133b4de0c95235f7a11557af8b. 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/TCAIC2447420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42670e5737b8240a1479ecea120cef6a268e0d9e121ff52ba5f9e6d801576a6e. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAIC2447429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe903210980d0af980c80a22e6cd8ad19db3fab2c61cdf50104ec364db50247d4. 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/TCAIC2447437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b2c59ecde4243fc8313b232c13fef0035c2fd7c62aa136a13164fa9b93daa1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAIC2459519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e18ffb5803cce50f3fbba8d7136e7066a9f0666361804656190be8ad2a43d5. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/TCAIC2459527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d19cd14c474a9901e8e9bbb614e9eebdd11968c6b1bd25076119354e4aaea5. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAIC2459530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb18ba8b8ec98d974aedab0054ee53397bb058f730498b7c9b6862e162e9bcb. 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/TCAIC2459535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef5dc5616f16c144e8ca3ac4b1ada446b79be19921f3f87973f254c8d1439bb. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/TCAIC2459537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5828a1f7b32d958fb570cc51bf1e1efce967cec167d88d92cea2a7f1cb8d53b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAIC2459543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fb1fa15f7eec82bfd7c970f0d42ac6d1e5d4b2b4cb65000e2012ef4f3e1a8f. 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/TCAID2459545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59348bfb1edee426c97a74b522d0e06e1c3ba5627c5660621d62ed157ddec8a1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAIC2459553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6b1648e66dcc6c56e4201583de4c4c4cad0525d86a838b4c7751e3568c7d6d. 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/TCAIC2459557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c99bdcb84a02427e57e50f50e9cb08028bb05cd08692f2b637795511bf15081. 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/TCAIC2459560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634a251d409ff8e954b01f582aa6abebf13eae52f99eafcae6d656e98c17fa70. 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/TCAIC2459563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acdbb772e03a7809e18273ad9ebfe2fe19bb22207fcf276557cb582ce0d51b0. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/TCAIC2459566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe19c49b5508c2eac7e5d9cf72fc8cc118636b528f5632498354b35873ac7ac. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAIC2478743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607063b74775eab5b394da9dd86cedc39e610a5dcfeab266356b31966477efb1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/TCAIC2478748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35eff5e73425a00feca98f5102d89dca4f1420c495d019a78aef8656f6c695d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAIC2478770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70deb098f3a6cefb7bf21cccdd08280c9493aa10147ab6cf9203941de6b685. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCAIC2478775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40745f01df10004259d66e40927ad10eb350ef0cebeb7dbe48b1b9c7b2c1e95b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAIC2478782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef8096719e1099637eacb607f7768b2d8d643a95a2c9b205c67111dc58953d. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAIC2478784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861a16f309727a923885143d06b1763bd045a5d642fef37f1b511271305a50c8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAIC2478788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce65add8279634b9f9c2c953d6f99245260fb7d0628ce5ff64cd31b93aa4d53f. 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/TCAIC2478794.