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 0x80be26ff1535920567fd3fd40b314bbd77c60cc75e412501e3050ac29a4e6b33. 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/7a9113e5-a68d-40f1-b078-c0de151c4de2.json and https://artists.proofprofile.net/proofs/artist/7a9113e5-a68d-40f1-b078-c0de151c4de2.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 0x3b15691be54ab6734dfb82cc73c862f61dd88f960a463c34ef85ffdae22c6680. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHZ42172590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c76fee4bb0eeec39e387416ec19350c8783b7e66b5eb96dc12db83c79c09c3. 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/QZHZ42172589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688b7b591535fac85b2d5a60689741d8172373363ea794b669eea7974d6cb310. 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/QZHZ42172588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2acd7c828859fbaa1f983e4c8abadda931d878e677706d423a3ad61d03403d. 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/QZK6H2225147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634bb446356ea92d2bc4ab9ef4ec51de85db3e65c3d0fd5437083cc2f23a14d3. 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/QZK6H2225151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4af3e6037cf1eae31c9380c407057ce631cbbc33527c9de01bf9bc1513a66a. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZK6H2225152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcefba652a00472c2776b65cc071160633ea4d7af38fd40448c62d50eaf8909b. 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/PT7YQ2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa054b33268a82f8d0253ae8ca7e829671fab209b36118f05600a9eb5a9891cc1. 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/PT7YQ2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb81ddae9e326174ea9ade5de669546dd425b4149a024a4ca776b363407fbf36. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/PT7YQ2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd19a5e1c5ed9b722cdabadf7210f83871e7c7a5e0253b8b3dd3f8298b4701c. 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/PT7KR2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00151713f0d09a0fa17b0985e272e0c9f2f676c28cc5b3b56b431aee547bf4de. 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/PT7YQ2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadea2ac2397e7be18c8a154e529a42f93430f6b38c267df0fa1db20e60b0f9aa. 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/PT7KR2400035.