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 0xcd934ed85f9f7c76d7894b23a6650243a8686ae46d9dcafb0e6850304af987d2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27c9244f-f57e-4195-986a-235ebade32a8.json and https://artists.proofprofile.net/proofs/artist/27c9244f-f57e-4195-986a-235ebade32a8.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 0x4a15e50faf237864b7585131103a265d4506cf42d394de3a3c8c6d7be94fcd07. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FRX201805416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94316489003240acd201caa007e9b77ee5b3bd7aac31233bebc7ebaf8590ba04. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:21Z), 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/TCAED1959316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63c9ff7fe13aae20e9896559ae0587abaa6e54f20eee554cb0305511940f78c. 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/INS181904701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383c9479f1105e59d34ade32a3b6ce3b384da9d2d0416ae0257845521f7cbc7a. 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/GBMA21866648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc683e44937d879f1db20bcfe8f40f91c48f9fc839e49d3ea6b857beacbb2b1f. 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/GBMA22048119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97b2717d0209793759065d209173cc533745fa21733e39ca821a138476fc1bfa. 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/INB942100949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ab9c1139f746a101c75502204e2cc452442791acf3f0ed09f7ec39fad46c5c. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/INB942100950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789b742e514ca8d94d798b5f2d64f0f938f5eb9c4e97d7aefc8896743f1bde67. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/INB942200755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4febfbf386a954dd5f02ca23b6e5540772fe590cca578d7140477c916bdee361. 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/INB942204357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64810e317096767d6c2b959321ba2f05bb9aefdda93e24e46e45f5affbe053e5. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/INB942300137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af7ca6f56044c0f3ce4523f94352a3a1fa9e34a56fd4bd0c7c4e9fb2804a8ec. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/INB942300138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabbb7f69cd5e3aa0e0fc2437f850847e2e93d488490afe1244cad2ff1d3187f. 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/INB942300602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aacacf3001d4071912da1c6b1fca71edf7b0cb0e61726b10e15c206bb5d48a9. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/INB942362278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532a8a6bfc44c1bd13dc1e3d524cbe9f6d8d8cb26d866194e647bb40b5f05dec. 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/INB942401313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04a3dac3c431002ec59da8819fe75a3bf3de93c1788186cf6daaa08c4c0d54b. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/INB942401314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846c4618b54c96ee870c17c1cf241c8c08f3da9cc192952aea9d0f1f810ff168. 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/INB942401315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb21767a5b3ddad472025735ad94e7e596f7b7ddc3dd60e9ed63aadf9e89a938. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:41:59Z), 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/INB942401771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a28c6607cf9daa6c09b4047bab4931524c03e31bf2450bd48c166a6dca2a71. 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/INB942401890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fd95f4077b7de801e8db5719fc3f10228335f983aab39055c10f75970f4b8c. 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/INB942401934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48eedf65be2ff0cfef3bfa2b3a6d772687aa3c5cc8aee98b35aec5cef9e8ab2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/INB942401006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbefe56ba0d0e713089a5e114beb6c48f5705bb44345a3d40ca83c231b96a676. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:56:16Z), 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/INB942402005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1c5f89a69c858fbb0b7cead91484174acddd8ae14f84e7e313ac34e230365c. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/INB942402050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5452f433585a23d8da0cec3daf84a0439d70f3a265c9b6f55d74acad41380537. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/INB942402058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515c397c974a20e56ec8f1940a1326d4b9f1999b272eb744f34d0ee7df7d7375. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/INB942402097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b85d8884549a14856233a16a271cda12f89be63b0b85ba64ec1476e8dd39e91. 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/INB942402143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ca6e025e651aa2ad46ded18501e021aa852287333e6df9f82b9a99a78c3a3d. 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/INB942402167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d556e29707bfb3889e39bdec478371d71fdac970e4387eae1ea832c2804e36f. 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/INB942515152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81acb3906d51904e25c9e12b49412c62b5799935ad1fd1d19796661def7e257. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/INB942515248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef985b6b3819b3a0ed9daf6e3b934bfd59ea01f9afb3673003e0f11985952e6b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INB942515450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37eb6d4dad2c95ed3faaeffba43aef8a24d086c262affe4ae32104dbe889cb86. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INB942515501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7705173caa2ee9319ed1ca581e42431f04589903fcece19f6072a40481d2d74. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJX2591458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94dbb50cb6295285b987b1e09b91f9a9337a7d7ea2a022af820a1d27d42ac09a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:55:27Z), 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/TCAKA2527832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ee1aed7d54af109dea831a4b6699818d4000dea469d60cdbcce8e1acbcbbaa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CHF032515181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566fbd073a35cf0ecb604cc1326b920f3dec13d6382d74d5e42ca05233a23b54. 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/CHF032515570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2558d597c8a3d032009dc337796483986a8d8c5dbf7f816910ea975438aef6d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CHF032515821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68a87db81c42e80c1ffe69cc83d474f1cf0375d888e0e979692d22bdc4aaaaf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CHF032515793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd79379a986a01e3fe3e8aa4a553237fedbade9a2e4ad578a067e15685d6120. 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/CHF032515977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6852a565f580e5d35dcaa9378c314c7270548321d2bacb6b48c3d3c32b6e7d. 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/QMFMF2520714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee427b0fa86baa651903e7d1bb68e5d5fff2699ffa5bcab2f695240861e199b2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMFMF2520715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b844116fe50e3579ca629e4cad0e7d81bcfc51e8ff3502220dbfed41dd24f6. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/INB942516173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15fe44a1c0a8bcd368364ca6a85b014d3c6a28b217b72ea01f71d79d3641f930. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/INS182001565.