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 0xf1685b4760625a4fa4150d688c17b92f0b96c56ea1eb525027df65be6d12bae2. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab0cc1a0-b765-4660-b551-d2205d2e9069.json and https://artists.proofprofile.net/proofs/artist/ab0cc1a0-b765-4660-b551-d2205d2e9069.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 0x8d5a372970c96a599c948596f1c656632e13b1828174113f670d8c3dc7bd9be1. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QM4TW2327283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cbc4c5c5e60af8eb6d3444bb012b5c04c37363884decbbcd56ba5be7cd6581. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:39:38Z), 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/QM4TW2335823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x676e21f4c402d7ea6ba375324e1e4aba6537fbf6b779132b73addacfe6a60a0e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:26:20Z), 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/QM4TW2335571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7136f2fdb6bd3c85ea7fae0dbf998d3664766588b619b709c1a7d5b25e8e855. 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/QM4TW2335113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f9d4e53ad9bed2497a5eaa810f78f46b38990fb46893fc027187075c932c04. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QM4TW2335894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a1731a2141f7762ae265e177dbd92f6036395d4d4ea4a674ac2e46ccf2ff69. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMFMF2230627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f8fe73b640c63d4f957d818e51f71eb694b77411b54a598cefebad41d835d2. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/QM4TW2335633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28eefafdf727eeedfc3a5efd368d018c5a83877511ba5b139959b726418b1e0. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QM6N22450579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56246d4b2c4cde3f9bd5461a6866e993584416427e7fc7c8f9f518ca13284062. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QMDA72567324.