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 0xbf1957a161e1a4deabbb690a869f6bafa5a1defe65144ee4574608ab24753768. 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/aa3de850-db80-43c6-8c7c-4d43c18f5b09.json and https://artists.proofprofile.net/proofs/artist/aa3de850-db80-43c6-8c7c-4d43c18f5b09.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 0x6425eb4144f3721e8766de75ed850e5d29822a03cef82ccc91d2eecf6f843129. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/FR10S1815134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e9bd0f28b75aff4a1c88b884e4784e44e6c3bdc71ae7011019b707d5063a66. 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/FRX201816069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00fb8b6e8d490dbe024d2504f2b55fa4f0e96d4d15118cd4d721af4d13a02c22. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR2X42055897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd4450da6108c8a3da6ca0459ccf812d41a9499b1db0912a1655c26b6dcedf3. 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/FR96X2010181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6275835886772a27d8d375d688090f004477d170bec3158c09fc7f68c9febf24. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:42Z), 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/FR96X2083384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cd4486a0b2c166c486bdb6e08affd0a2955f7d77326467507eeb2782d608e7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRX872023850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43763c73a02935bace5f46bb2ac28da30f36d499f98cc0cf4ac6b66244c06bd. 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/DGA062063204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2486e09011dfd39cb27fd7d0ea403efae72a3e79f865ed44ccefb01b51ad871a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR96X2124199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574edd69138668a101d804e07b15629a6069929881a5a642030f7b8fd2691679. 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/FR96X2161483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56293a3c9cf69aefcdbeb236d10c82c11ca54caec0cfc9bb10f7233bfa115540. 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/FR96X2161484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04260ffa5ce526b9b25630299be19eceae8fdce6c93d87bd7627ed2ff00eb80. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FRX282127703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27c29df1351bc5ad4da0ddb5ad6cae6c5abd91658a5309b05b00229de33b42c. 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/FRX452138724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337f9d40d7c3b73da7411d530df853d17c4cb072e1b2019fa40f9b39fc481b9f. 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/FRX762185478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8433030c7f534480477b914b18e3f6625b381aa785536a45c297a417787f249f. 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/FRX872127729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f2d05a77258c0077c42d8e1c51ee01a6531745e4bdb7597b206bebe67bd0e81. 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/FR10S2214406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0917cb9de433da3026d428b698c117dd6a32c907ce74f9c3f01e6dfaa3b957d7. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:52:18Z), 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/FR96X2289948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776db8317f67343b713cc06f8ba556bb8ada5d83536932cde31a61a004f84d83. 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/FRX282290140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaba8dccd528c11c61ab8048d54a5f95b954d7daf8f9eefbd9cc1a8a57c7a589. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:26:35Z), 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/FRX452283443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815dbe94d74adc311c4ff2b5668b2d098f91c4308b34578e6f9f42d0aa7b41df. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/DGA052255878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4446a16dd464efe866c33a3d461d3dbc093e5136f310e1e0c1a5fc4fb18d2ea8. 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/DGA062286149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaedf6ed5726990828c4f1e8f83021856ec9f3a6183ec0ed60c125471c8bb55a5. 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/DGA072225690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f823d56338ee7a5a8cad8bb39cbf9b17cef6ae393698cab5a149d58b9f81b3a. 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/GX3QR2301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43475e495d0a28f70a3322716726e72aea7608b0c9ba32befba4b25c57ad0fc4. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GX3QR2301111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776db8317f67343b713cc06f8ba556bb8ada5d83536932cde31a61a004f84d83. 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/FRX282290140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3f581fd5d845ee70a6185db6808aca2fd1a8bb978c5e3d5df5259eb62ec1e9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FR96X2335971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808e001c4eaf48e21cb2d25c12a4f3994c426b32732eb2e17b220b9b9f19027a. 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/FR96X2335972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cf4dea5b25b87bbf5c339eb585c59163a935132b05bb048571afa35ac5a2d3. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR96X2335973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c673c001cb46536060aa59a4770700afc833b11468ffdb85d5dab4c55eb9bd1. 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/DGA062262556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46424f6e8a6878913226d5d7fe8dd3273e44ea5ce6f5d5d2238371314e140d09. 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/DGA062262448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4360baf6de17985c2985d1908ea14f594aa6d28f267fcd76e65dcf1c0e4bcf. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:38Z), 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/FR96X2335975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274e690b0ce2b67a131f8adfb39833c3091b11cb03e00b464c47f13f3cf08db4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FR96X2335976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95a4b80003b4fcd1c92675f293e79e1ce0440c531768bd32bc1ec06010bb070. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA072295375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0e1664baf32f4b49ddb635063d77de7cb142eb71e044b6cdfa57edbe70a761e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FR96X2335977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815dbe94d74adc311c4ff2b5668b2d098f91c4308b34578e6f9f42d0aa7b41df. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DGA052255878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf629b78fc842d67de1def398b3dc41527c39f1b81600e70aab2789ecf5eb9. 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/FRX762307922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51e2d55e1e446b7a9ba8e126523c2b3f717c174a93ec027e3fde34cca8ad49b. 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/GX4R52335466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaf9b0d61cb17d223270608b5cdaee83706ee796316abecac93010c02ca2e38. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/AEA142401293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec92a3d4e2d82735b26f296720a1d7d5fe7bf3f567129933b30994d4bae67ec. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/AEA142401708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f06a737f1616627410df35cea948898ab9dd1b11076215aca9d08584260f92. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/AEA142401971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b92f86ae73492dcc09186989669530a17f171a3ec69ef351303f56be4442852. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:02Z), 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/FXR752413198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d380d1d0a7e7b1f8abfb534d42d4afdd6e376a15c016bbb52f591e716a343d. 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/QZFYY2095505.