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 0x54d30ef59fd2f0c469882038153e69206f4c13132dd6491d441a9e1e8ce1a944. 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/ecbea052-d57d-4162-9d08-118d1b46dfcf.json and https://artists.proofprofile.net/proofs/artist/ecbea052-d57d-4162-9d08-118d1b46dfcf.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 0x535f9e5a707c6c3d37658b058ef38eac307eea4ff6aeeeba8ede202a80e779af. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZFZ32081209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949b643001d7703e141ef6638bd1a7ebf143c53e97a0c9233c97997659c9a901. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZFZ42052129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98a7a351a781b6465aa525048c04c28b9eb841cfffb7cb2e861ee1e49ac433f5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/QZDA52066031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6890b5b83a201c30d53e85104fcee3cbae37c9e53e108348eada264a402a9f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZK6M2049276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e619883fa8eb318d711a1a2df59c41ff64ab97e3ee40247aff08bf70a975c5b. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6F2127188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8688a4d06c2ef2ddfe5ed243c315dbb8f3f14ccd229a31644223f45862d83456. 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/QZFZ22255460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb903a7318aa85342d5fb2a83eaf90150ff940caf2533e658025cf08c3b2596d0. 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/QZFZ22255461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5052e1789a88f9188abfc92f34fcda393f05515586f35d6849f0a7fe7532834d. 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/QZFZ22255463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afec7d8fc3c2afbc145aeab9b12274521733e7ae68e9c6b49d6ffbab0f4bf12. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZFZ22255464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29205e4804bf47c0e36d17e36d87f45f76c2da54c0cfcf07a331d872a4351d4e. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZFZ22255465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1b740aa106b8a98565a993cb90a13095d7c750d2121794bb2a554467ecb166. 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/QZFZ22255468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52af7878e2ebcb86956f11d34ea550acbbb1017fdbf5104c5f63ab56d669da8d. 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/QZMEN2274193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00953455261624d426757d70d54a56238d792051e4e7232803f33ab0910a769. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/QZFZ22325154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e7cd0227bba46739800b0cda21d269091d4f5674569cf380116e6e5fe6c7be. 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/QZFZ22325155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf5821cc5396ec5051dbbe7aa0a6a23c624adbc68fa4845d79216bc96495a7d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZFZ22325156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fd0dfdbb44719089894550eccd02b723ab9b8bef74f23e1c484a2479e00ec4. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZFZ22325158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf365bdaff8ffa4a399cfdbca3e43573f0e13de417545dd8d25f1232eea2cbc07. 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/QZFZ22325159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3943a73f4b01cada5da11f85f13248fe33758591fe6797b5e7577d0ab42b0fea. 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/QZFZ22325160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5f01f27a220e485f6a83da444164eb147fce6ecf47d08c1b1165d525f78a7d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ22325161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e6df7335142c3bf261577f8b124c8caa90a2b416f7849705f99d642bd53b6e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZFZ22325163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38be464f8c503a6d367e86ea30d1200a15e62ec10131633a3bf3f963b302e68c. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ22325166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fd045cbcb72fedc7f1ce4658e4b145b6a9e2bbed5e175e39a9374603b752ff. 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/HUA612403170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74e5afe9a5fc4e2c8da86f2a9f9816929c5f5b67d6b3b555ca1f7d5a368e539. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/HUA612404994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368e964105ef8ae29f176c67d5138483816c63483d99027ce9c09f74d5dcf497. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HUA612405013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2173e15ce4b546d70fe81abb65b45a22654a4be08a435c5b2fe50017fefaeb4. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/HUA612405016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abd324ee2b5dcfe6641ac2680b61d443297541a8b861de62152c51d4d251111. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/HUA612405017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35164629b00c753b9172e7292bd4b9d73cc2e45445085ccc21bb0ecbf8bc80d2. 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/HUA612405021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1833e4a928276a4c062773ced46dbb81250379902bc815ef7bf446b3bea96aef. 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/HUA612405018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbbd51519c6d3055274806714669cb594d37b69b06b0e366c6a04d62821bc26. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/HUA612405020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26db94b1934d5212f1934496bda8436fe0bb3c4a572887f8e0015a12ae64fce3. 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/HUA612405022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baa936d1741e5aa9c77f6eaf676c6588ec0b983ca16998ac7c6df49e5e42de4. 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/HUA612405023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e08eac8452ef53aee87b6636e6460c4b14769c765fa803e77f6945c5c1b4ce. 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/HUA612405025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a69395573bf8d6498919f471414998c2879b881703654aedcf8194bea27130. 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/HUA612405026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4df6ea2ffe7b0d51a7ee9977a195715d6ee6f398df037e728b5b8880fbff943. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/HUA612502036.