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 0x2d87893185864ee0dfe8737a5fd5e76cf6b7a34cb6362af208cef7cb7bbe52a1. 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/bb8618c3-ab98-459c-b284-71b00da633e4.json and https://artists.proofprofile.net/proofs/artist/bb8618c3-ab98-459c-b284-71b00da633e4.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 0xf96de179d8b71aa0bca71824429c5ac47955b57e1b4adb76badbcee65b76b44d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6F2199278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe0dcc8fe98ef94eb5e8d8eb0f71516a10856347a1c0d34e8fc4c83d0255c1b. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZK6F2199279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fcfbe2bd495efe83ef8d71fe803040de8a334859571875566ef550556ce024. 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/QZK6F2199281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8734a5e9934e6ee9f5bdec9c3a67de13129ef2ef6289f74abf96eac93b4bda1. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:51Z), 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/QZK6F2199282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572d5ecd1a33d96a479c2ada0a67f5fbe5edf90ff37911d5a213d7afbac85daa. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:21:10Z), 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/QZK6F2199283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146986204c7b1c3447a27c421f8290e5e03cbb7fa32c4df2f76db368e4cd4af9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZK6F2199285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19833b95d64ab941cd8fc95964941b6bd61779818f72b10fc332b47274963a9. 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/QZK6F2199287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670e7046ae1f868a62f79e93302ae2aeb1d6e19e123c8575732f833539e66e50. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZK6F2199288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc1db92981f20af94506ba96b1bcb72ceb200f7633c63a5c69f4df2aa55050f. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:37:18Z), 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/QZNWW2197633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3937fec963ad41dc48549c975cb361ab1fbaff37c83fc1b5bda4af6662325e89. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:56:11Z), 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/QZNWV2117274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4129248f86c9399b1ae19d8606bddc6f571936c01170060d68afc5b2072817f4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNWZ2196496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a876ad224c63e145944583f39e2adef72876f826725e34af90d59d3d0cc7305. 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/QZTAT2124580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f13c5b7451829963746d9af3a80989a90d702baa3459de6ff6cc624ab200a27. 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/QZFYY2232605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467391bc066cca6a08682782f55836f43c3d564e17bbd6bad11fc4247196d046. 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/QZFZ62276150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b174221f4431b5ee77ace86080b53adb7ea9e235d81b3b3162ab1d0ff84198. 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/QZDA82274634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a263ace1a5f6e03bcd505e5c0f7429f55276ec70a4ccfd94fe6d8a8b145ccf8. 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/QZHN72201302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb29eadae166497f8e9b7d049131991fc4b98a6ef4525bf5127e60b5ef67253. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:44Z), 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/QZK6P2283814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a14cb9b37d4c73f490bda3ef6c72fea696bc177c50a12d231ead1728f248abe. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMEM2276143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99e7afc4894fb11d5c4db19440bda2a00ee1592ddd3625fe7c3f842b4c8506b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:50:11Z), 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/QZNWU2299050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4cf1f2d70699c997443ad30297d84326727bb33650f7e6d1fb9f3e8bf047f4. 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/QZTAS2298462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868aa4348387640c17ab59cc34ce8ab3df4dc83c15944e39cc4aa75693f3497f. 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/QZTB42222196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb3dd8d4429d7716b86c22862dc06113f2f02c150bf590c871c04a878e266ac. 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/QZTB62272937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7239759d3112bba614062e403c79f0823f50db526f562bca402db8f6487a878. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:31Z), 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/QZHN32307636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a0407d51da75af47f3916cbdb7da3bde6b1916495f293ae106efd685660ced. 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/QZHN52316370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891b99659728afc4f1ce68cca6e9251afbf6bf90f56c178dfb5ff2373b4f4083. 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/QZK6L2360324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d9f8544b335e807cb25ae0fdf698ed33255f64e2280cd1d716088fb9725df2. 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/QZK6F2368515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ef5072983ca2a2c4b6d178c13fb084980a9f3d166a3273d6bee0ad043d6b04. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWY2333797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5997c646c5e359238c9cce5ea441f684dad513f3b78405cc051e10a3a69fa5. 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/GX2Y42200059.