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 0xae8b8c99100520e69e7ad0b71cf4adf4d0ef10afe52d2b6246ac105f087196ac. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb5757b4-ff45-4249-8f55-0dcf7f2b9d0d.json and https://artists.proofprofile.net/proofs/artist/fb5757b4-ff45-4249-8f55-0dcf7f2b9d0d.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 0x8eabf6169b56202976b1497eb5e1acbac6e6c5c5691f3a73e49bb195cba1cfac. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/NL8RL2317548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e6939c36373758c9b9e30207d001901e21adac05c91013d314b08c67d3c683. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:41:08Z), 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/NL8RL2317549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe1b5a154868340d1226fbed69729b7e983fe400360882a66daf79d26ca3f33. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:38:00Z), 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/NL8RL2317550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72a5696c8c6e6b54edb7b75e22afb6b07f7f1f5bf899233b68246854ff91917. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:25:08Z), 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/NL8RL2317551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf556df2e25326434ba945fdd305b279e24419f3c71d98fbf3b13a64c47623e51. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:42:18Z), 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/NL8RL2317552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb92c89ad8a55e79012c8341d9f5145336e61e7efe5a958aedf147fa56adbc6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL8RL2317553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1aa6c1ca2b16cfbcb6991f96beebef84324b1b4d4d975251902fa80885628c. 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/NL8RL2317554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20d96e2076dfc8cc7abb89e1f637ec731ec9925e652980d0990cb380b5a4bec. 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/NL8RL2317555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9485900184e83a93cc541cfab646930a59c384d433fecf1866043033b965b0. 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/NL8RL2317559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7186ae49060bf824827daeb718fa8246879209c00cbe082a474f636ce16ab73. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:07:30Z), 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/NL8RL2317560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0ded3e14dbbef7939c396d660fbc03a8bf7f6092e164be40e4e825be8473db. 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/NL8RL2317568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ca03c72cc35fea93688ca49ae9bcdf17b8aae6cd1cbab327d2431fe77bcada. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/NL8RL2317570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7579581df3fc42eb7fce7fed4c939fda5063cf04ade1445432667528a87b5b80. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL8RL2317571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd9e656bb2ca23139f999c1cc86d1532e3e30312ded65da6776ac1fe7fee64d. 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/NL8RL2317574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5eb6fc0410f13ef41dbc082f1893ffb1820e0c666a34e50ea334a6a6da788c. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/NL8RL2317575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93894052dcc1c00960b533711a8e1fe67d154f3de9fb1d74b79cde830956e79e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:21Z), 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/NL8RL2317576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab94d82e75f325839f93a21cdd76183c45333b082cf14658dc8cb0b12da28004. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NL8RL2317577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20750d0b17e1024021534ecb5d5d91c57e7b147e6653158216f5a79f506fb0c. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:49:27Z), 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/NL8RL2317578.