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 0x4b6ea336085d5f48ac94dafcc9cc1223db21f0691689b4a04b7cab6387296546. 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/726fc4b3-0313-4f8f-b758-3150defe8c36.json and https://artists.proofprofile.net/proofs/artist/726fc4b3-0313-4f8f-b758-3150defe8c36.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 0x2853bd0d4d18cb26eaf37f272433134319d188f415aabc4e0784a50a666ffef1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BRRGE2300676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ccac16dfbf826e1246bca4b8ec6ce22628a2f499f3726251a921f0eb09cefc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXA5K2300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bf401694f909bab4891a5cf73a068941be4766a73ac0c522f60e2ac3586671. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC3RD2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2853bd0d4d18cb26eaf37f272433134319d188f415aabc4e0784a50a666ffef1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRRGE2300676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667805d5dea3b9e5bdd00d2ffdea666f7124c419fab48c67ed163e2c682b2ae2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXXIP2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335d6e6ad166b90e4527e541759e7fd66962856342a904a036a81b939ed6af2f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRSME2200469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335d6e6ad166b90e4527e541759e7fd66962856342a904a036a81b939ed6af2f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRSME2200469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcdb7bd48387b8caf9a6954db045d10724fb8d9b7d1d96d6125e779c546064b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTVM2371505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc5a9188ee6ca53c17b73c2fae353be433b29e46025a6a5c034007a41bcbd32. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRMM72400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fcdb7bd48387b8caf9a6954db045d10724fb8d9b7d1d96d6125e779c546064b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTVM2371505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e01ee3c6be6a15805bcf8b1d42e7a79deea5c6d7bcc885ee1b1512dc227f77. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXS2B2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e01ee3c6be6a15805bcf8b1d42e7a79deea5c6d7bcc885ee1b1512dc227f77. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXS2B2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e01ee3c6be6a15805bcf8b1d42e7a79deea5c6d7bcc885ee1b1512dc227f77. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BXS2B2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee314e9ccb064447e18753565772b1e90ff064ebe64de5cf041b7de8f3ebc60. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC7JC2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee788eb9cc975f2799470cec4b75be10add32a172af78672d39f678048c55973. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKFZH2300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3a64e7eecb646f6be489594bf2407a1a8b7eb3eb01077360b829b0870c778e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKC0B2400005.