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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 0x17dfa93e10d19f2ab72d6fdfe62844df75fb73be37c438b257e7bd2c7a1373c3. 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/bb946c60-8218-4098-bb3b-517547cc2dbe.json and https://artists.proofprofile.net/proofs/artist/bb946c60-8218-4098-bb3b-517547cc2dbe.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 0xa6a1b3e2d9d58f669eb760a5606a51666f06a044ffb0dd10e5e2c39ccdad9a6b. 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/QZK6N1932768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf4214faffde5e504c1481dfe7012fb425e35c62cb2ca87591190806ed104b5. 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/QZK6N1932769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50086691d0c5ac3072411e283be70cdfdb8df11bc65d128b369c41b355213de9. 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/QZK6N1932770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9455bb1724a9b3d71c29df94f565953c7b03279155165198e6480548a79e164. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZK6N1932771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02df59b067943cc6127c3352f5d965628b20110367fa60931f20f86295a4355a. 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/QZK6N1932772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9ffb7a9a3f24c32e0444f0c4abea7c11f427b89da13ff32de0e214d308c70c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZK6N1932773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b95a605fb0023c83cd5896d135096f3d1cd9495eee2fa872214e85f3d0dd9e. 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/QZK6N1932774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb565a44b26ee6623cda064457ded42be78fbec5da4042fcef8fd14b1e7aed48b. 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/QZK6G2016996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87285542848562c63fd544adbbad2e494f2d919780382666a2c67e0551d03b91. 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/QZK6G2016998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9c39488f48b47d8c093e5ba2602e3723d6f2a552b086576620f5822f902763. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZK6G2016999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b2e957201ecd227e12cb2d5eff60bd2da34f61267db0c12bcaef86ab938d5f. 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/QZK6G2017001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72462f5fbb6c66766e805bed52f46c5ac014bbb1fc880baeafa765e797a5be39. 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/QZK6G2017006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d84473f0977ce81c21e8617e42af93f1dd0be7b1d727101f2ac5661d1973a9e. 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/QZK6G2017010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875497c2dfe7c577906bc1b43dd2c3d6e79a8c0472a130b521ce1293c628bdda. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZK6G2017000.
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 0x3871fa2d505e28ed3fa2737a71be001aa66997b0013531901d03a89d9441ff83. 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/QZK6G2017004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93310ce5099e398d706fe3ca05f02bc7b9a06d48c07ef92396c7388ec9597fd2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QZK6G2017005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88bd02ab7954ae3d9e45ef53340a4bf526580672e58927176113d7ad796d5dc2. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZK6G2017008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a54a2dca70cd56e603c7ee3f9595dde090e5e8a180c71fe7e70b74770dad41. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZPLS2140716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7dda70e2118595bbc413eca1496f68f3b0256c81dcd61a37a3b0c44ca2f22fb. 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/QZPLS2140717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3821967e6a0b99f609d912295baa32e0bf025bcdf8e5ae55a08eb785f36d0b. 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/QZPLS2140720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f2099ff676a0947eb2ad7419cc4f286c4c6129c8a38b0dfc2bee2c3f11d3fe. 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/QZPLS2140722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a33262db111fc0ea99aa64032970d027348781dbe7a5d6d9916757d5cc21acd. 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/QZPLS2140715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3365fd5eb2ad355239bba2e23c3458e021662ed77de318d6b6cb33b96debb14. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZPLS2140719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb485d9ca0b3da6601ed598c2c9aa27c4ebfc71bee76d80e218bd19b8714c0b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZPLS2140721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe8222740884ec556391b372492ae33c1db8e9ed575b9515b29de9d8bfe6aa7. 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/BEAN42200203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e0620641add3cbb0a83a709d96df267ca0d2902f1cff447bc70c20097d5698. 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/BEAN42200206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec26fc94d9dfa8934eb4f26e6391fdbdfe7f23628cf51b815d529582962359d. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:51:46Z), 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/BEAN42200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ce0e50a6cd064fd5382031fc20191ca95723f79178fc62ea2356b375038042. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/BEAN42200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bb8391c1bb76055c0d2a86f5cde6a791b4b00ed64ff54dad06d38df51fc9fa. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTB52219329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f31700ed323c695a1fb7a21c84599b1b989fffcdedfdaa5396e1162e358ef2. 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/QZFYZ2566219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1d7ac46e8f24f5f2616a6152628940869603bd609ee0d546ea59288038b709. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:51:18Z), 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/QZFYZ2566224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa551bb4a1335907f630b86925a8dfa644de79fe9ed06a779139e8332e61e909c. 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/BEEJ11900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932d3b7911eeb84ab211505d1370e10ee2ec34e1ec5d5fd5ad2b3bc8abc34084. 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/TCAES2014288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589a91777f86765d6a8c891b978ee089e57353639564a14a38ce941bee97398b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFZ42109709.