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 0x375180bf1f752af4d73301c9766d724e5998eac813d1d7e592d6181a067a703a. 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/45a95e6c-119d-4a71-9a75-fdb2c7f9ab98.json and https://artists.proofprofile.net/proofs/artist/45a95e6c-119d-4a71-9a75-fdb2c7f9ab98.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 0x71e5cea6ca821db821fb48a9017eea4d694a0f9ddec84a09f1c5a3d20ead33dc. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ31997691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10429eca6790e9a6158facd2f948a72396b00e4d2aa3d59a0125eca23d7eed99. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:01:47Z), 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/QZFZ62056743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eee7cd31b36a25282d8bf457d5701e70818614892cbdd0a2f9216af9c2b500. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZHN32118315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b3fa415e7a7dc6ce2c5a212c3bc887bb65edd66a1ff37627de87297e6d755a. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:39:51Z), 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/QZK6L2088533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec6c37770307896536e3c2436c424854eb2b90505f6ffe5822fe3d6874bbe98. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN92244178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184fc313573169bcfa063cfc3f1eed1a38061ee89d025cce6e6a60f389a5b629. 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/QZHN92244179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07008ca6685aee3d2036870cd3ba7e778eb0199e1e93e0560d0c20531d82bb82. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZTB52376491.