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 0x1ebe6d1a393eae8659a0d11c512e841582d3086cf92f0d86feec69e1956e9fc3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/527edc3d-fe1a-404d-b1c0-48eaa780af5e.json and https://artists.proofprofile.net/proofs/artist/527edc3d-fe1a-404d-b1c0-48eaa780af5e.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 0x8d4554532577ca36be614a1860b44303c4ae637d4973863c8c47d2bcc5fc1ac1. 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/QZHN31953449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde86a0093754b607db119374cd16ba0b74c3cc814208a690dfe2bce7aefc080d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:37:57Z), 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/QZHN61924694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287d39f6993154965d77aebbdf6ba969a4dce4c7f1a61683375f3582b4d0b714. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:41:14Z), 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/QZHN82131687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2627beb3b103139dc994a8ddce7867f5c4ceae887670bbc15034779dd6a6c754. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:23:57Z), 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/USJ3V2089593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd03cf8800eed92917ed42db801388a6aa2f259820caf457a9c17081cae5d9cd. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:44:57Z), 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/QZES72202660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f0d0378a7c37965a93ee7aff57fd7dd1f1a2f6680780c67f140f843037a9486. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTB32262033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb86b9f902d1782208c45b289cd24efc4e50d3d6b46de45b50547b02123ddfe2. 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/QZFYZ2422804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9e18e7a5e15e3eda547c74e4dc130dc6c550aa7425a1981317c9ee3f4a447f. 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/QZFYZ2424675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd27ebd322993918eaa1271d473e38a4bafc8af47b0406241a3c7031315d7d5e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:11:11Z), 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/QZK6K2424156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943c5e59cbfbef49923d0653d06cab31d18a0af6456f6152b354ddd7f06d7ca9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZMER2456782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21f06e6097f9fdfa579b9daf6c24b5c36b741f82bdba238daac1f4aaa96f4bd9. 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/QZDA72556988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c17f4cdae119f548884af3d0b88b31dd72bb7387a1d7f91335e30a53d104817. 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/QZES82553891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772466c5a7c4de775f82930f2937b64adcdc18f4f3864cd19272e6b4361fde90. 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/QT3EZ2430272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbfecf0e5f7a66d68c2cddf653df8eb8be903b8eb972526458eada3a6c38306. 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/QZHN52558700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebad5a4b7700fefc827c73b91e67b1be2c8bea6ea9dfad66a182fda0d05dec3. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZTBA2528237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1ac73b119210919792c7c5302d79a23fc7594bb3996468a15f51ae8424e4e7. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:34:49Z), 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/QT6EB2533954.