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 0xfe156e8f1336fede2cce9fb23485b27668f296105df3cc01e8a150651762f95d. 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/9d755f89-d73d-4ee7-8e09-b2f8668824ec.json and https://artists.proofprofile.net/proofs/artist/9d755f89-d73d-4ee7-8e09-b2f8668824ec.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 0xe0a0ff23059b5ab2c502ae3d760778e0015ab1c77ed5a1b776b47c42aa80596c. 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/TR4491000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce80b1a81af5918ffbd9143c0cca3a98717a4cfadfd1b06af198b83508d30b7. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TR4491000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245e449d6691de4b0c6086e4e1b1b7ab752be92672defe23075f05dd45f26f84. 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/TR4490700058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc79011321336f0f39eb95b7f9b5ac0d6f6c5480e9f8f43070ec093ec78764d. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/TR4490700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c163a528ab6c21ac7761da864320f85392d530a7376f84afb7ebe7ac176605. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TR4490700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0938a41afccea9393369ee739169ee077f2d7f0998f6111d1573bb57186e063. 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/TR4490700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1583c1038f6691a40f9a117626bcdff5cccfa3a4b2e93f77c76509cd06a6ea9. 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/TR4490800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700583b376fdba2e3f7f4170e24578a0521a398f6dadc7dfa08b10cb61abc594. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TR4490800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243cdaf022185c06223fe98489b0fb2f081c4232e27c7de9c5e3eccc6de3863b. 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/TR4490800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb7225de54d42f41ee704e3ed6e80ffca9573efebe640e41b44f0b6d6aca56. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TR4490800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4769147ddb2d3c47ffb3fe7305a33ea68f6aee8046f4b268553458673944a787. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/TR4490800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4b05259b5e1c12d67bb57115e2b2306a86c192ed510fa55b7ca2c959873735. 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/TR4490800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112fdd380f61ec9201243a3a714d7e7345b4e297659e7bd7f7ab168ebeb2b757. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/TR4490800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7800c49f505a8e3cc96a6d0f760cb999b1bd51079b455e438d7bd2f3ff33f040. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/TR4490800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a922c02ade75bc895354e715a03b250163250017b3287c5870d3b88d8309c32. 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/TR4490800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1522b5a90966e32f1cbdb8ed932e440dfbebbb85cd0f2f098c996c18b42712. 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/TR4490800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10644f712bb7862a625d2e096c1d93cd24ac1b1a22c6615aa347dd8e27d4498c. 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/TR4490700111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39808827fc8642f95ff5f710cd83c0de48b7b322ae77d7c201f314cb8a84cdcc. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:59:22Z), 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/TR4490700112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d3f9728c51cfa98f73a28c47240295ac762a2f276b53f59d045626e2cc0c05. 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/TR4490700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8fcc4bb7f639bfdaf062915344060b291989c2306d06747af4c69eb91657f6. 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/TR4490700114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d47f32a4b5331cd187a5ed614746f19dc77fc8fe22ce308553d91bde846bced. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:41:54Z), 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/TR4490700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4a69c5d54bf3688f01471f92776b73d3d1fb2b0335d567a8faf78c7142e10b. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T16:49:04Z), 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/TR4490700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7548d649d04a6efcfdb78de9a5c9e8383df2313f254226b33a938c7162fde8c7. 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/TR4490700118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85022fd7e7c1be734cb7846a551315d703a725ca6e4ea6b8ac633d1b3c89670. 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/TR4490700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16426be54345fcafa3b735939a68b3a8d50707bbec8128b76aeb5f584c5ec4cd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TR4490700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa935a7dc056c33fae796f05e7dd4e22c14c60058aecb22b25b6c8d269f0b9874. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TR4490700125.