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 0x398fbc88dde65bc628eb45c80bb5383cef835310b0872ec680e9b30a4d13cbd6. 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/ad49e912-7b46-4729-ab9a-f52092b8b4da.json and https://artists.proofprofile.net/proofs/artist/ad49e912-7b46-4729-ab9a-f52092b8b4da.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 0xa0779b0725904e28ad9231cf9ef58df3e501cb3599a1bb30facecc086aa227b8. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T22:55:24Z), 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/QZFZ72047902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6859071b4b9b83e6906d7198a28e0cb1b9ebdbed8ade4abc27c64f7784ca72e4. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:02:29Z), 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/QZHNA2105240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fa7890b9da8da14cde93a3305c957a0393c90fc7c7717af8577399f9c65baa. 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/QZPLS2157335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d6c3d3714059a6260dcce221c6f80092e302fd4b070787176be2f0f06541f2. 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/QZMEN2243005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d6c3d3714059a6260dcce221c6f80092e302fd4b070787176be2f0f06541f2. 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/QZMEN2243005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40058d5aede62e2c0a51b3e7210dd4d9a589d5c0744d15445ffd5049fd7e2632. Chain 2 (Bitcoin): anchored in block 958752 (2026-07-19T18:51:57Z), 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/QZTAZ2229808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9a6a738c2bccdfede2da2de9ea4167c7b6d4b50e6741dffa3455c1c6cba78c. 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/QZTAZ2229809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6629b86ef2802a02b374fd9661ec5c18ea497831c94a17182c04ee699296c306. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTAZ2229810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4778579a0a43565aad659a502fc225dd7e355355ee960a47d599c34f49da99a7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZTAZ2229811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a2ad5501e1c8dc4c8408548eb0c6b9a4d89b1a480c6a3ec1e5d6b87dfa15e7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAZ2229812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3b05e0cb32f821adf65b3c170ad5bb5a5c94dd173810b43d1d0b9b6e8da63f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAZ2229813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4332ca9b8b74903b06d7ac59ff21038176f7dc11b6d42b3eb1062108b87b1b. 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/QZTAZ2229814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932be404d239fa2503de9a9f80669d9ec87759cadba5895b463295b20567e402. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTAZ2229815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8793ffec5753e222692fc18c4fff600e6b7e6cc52f68e5dc2771383a3bf1dca8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZRP52283949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cf64b861eae644e180c4198d8d99ab39b3a35372548f6ae1cf4534756e2681. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTAZ2229818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc2617168bf6b8fb3816a35a8ed7aafc5e4518c27eae8bd41638e58b4f38c0b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:52:07Z), 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/QZFYZ2449186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa262e1ca82704c8fb65c6a38d139ed9739c1ce7dacff02697c9016384b96ac13. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZTAT2371783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efd7149cd9952b33c1f693843f2eb789a02f3c91800a01b325dcc71ec7e4278. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZFYZ2449187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7430dcddd61863fa20eb79933533b936b097ba55b5e7aacbffec7a28797791c3. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:35Z), 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/QZFYZ2449188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8400158eec4b53ffc1cd98849094bfd68681eb63a1ecff1d8be08f813575fdc4. 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/QZFYZ2449190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39c5485e3d4279c12cac0d3968287e3d7cc29798753ee248300586955a05301. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZFYZ2449191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd295b4fbd452cb2fce3728d3c241d3ed3a507253be24987265b4a9a0bc8449. 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/QZFYZ2449192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd7e3cafec5058c46562eff3a844a7cc8cd35ca92e9a4bac91eb8006abf6928. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYZ2449194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498cc5530c1cc42f1baadc073d5bff35e84c8f6cddef9f6a91718b4b5442aef. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZFYZ2449196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bb7db0a6dc523f99ccf0479dc18241354512d7e7eb55ae5c729d9cbaebdc18. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZFYZ2449197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3b5c7c160eebe6eb40ded54077e860922b5f2cb3acbd3243fa561be1f11904. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZFYZ2449199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a7625a9647a4f980996cd6c6d788f47fa98e93cb300348c99284d8335c366e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFYZ2449200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c31c7b5ab685bcaf503704e9555943ea884283721eef22b83f977d3ed31c89. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:41:38Z), 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/QZFYZ2449202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d8e55bd12e4b2a07f0ead70739d4f7d51fc11d547008c17bc7209da9ac8c1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZFZ22429959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda529d60285cd30e61c91da38ca7aada9e77feb624d72e0bcdfb59d23a3e0fb4. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:51:25Z), 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/QZFZ72405675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497316fc6b4b7bf210bbb5c438be7dcb027a5e740541ef6778f63baac9288f58. 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/QZHN32481947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b2485c64f64064c3348b39fd3bffa1fecd0958e46cc697fc85f05f5fd5344b. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZHN32481948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7633219b855d876b95d800eb6c8465970358fce45e750924e7dc77976fcc8fbe. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZHN32481949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb624da2ebd83ff46864b62ae9a56fe67d55059da496c97d9fbf918f65a3dc76. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN32481950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9701994811bda15bb1cf57da30707fcc1005398bd0bba8f7909f5736d7057f1. 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/QZHN32481951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaf8d057bb48fd46fc28254775cd2aac1241fb954a5ea8f3644e61c009c341f. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZHN32481952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c52ce574e72661dd1a54e2276cab5108bc6a90978f57f9d314d7deb284c0a0. 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/QT3EY2494996.