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 0x4aa7f7630d5496f8e7f689bae8f15f1091c47928a209136eb906f8564ff3b3db. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7e3a564-3af8-4bac-b51f-e0a861e172e5.json and https://artists.proofprofile.net/proofs/artist/e7e3a564-3af8-4bac-b51f-e0a861e172e5.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 0xdc66ba3150a0b798341f98207adac8a1ad1328eb6a0a83b46c24fdc0a16ecc92. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZES52591278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413baeea31beff709a9812bdfd5784341df38c5528f21ee5dbd7785f05c3b1ae. 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/QZES52591279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba127661848daf010dd54b381028f1f6f137a94e12ae097f0e4dccb2302c5029. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:20:04Z), 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/QZES52591280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94ba2435c81a1f24ce6af7b6e074e3501c54c05058914129c6b4515b54752b32. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:10:02Z), 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/QZES52591281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67235a5148986b523ec380f212933d12ab8f406be6a55c0bca9677dd70e34cde. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:29:30Z), 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/QZES52591282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d5a129125ed21d988fbaf532db1d7c0badd4b8edc0d14f9ee1049d387f3f9c. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:22:11Z), 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/QZES52591283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77326aa9d30aa9f73652cb84b8f8c921b3acd58391b50e77991c0ce2ef041a0. 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/QZES52591284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b3c859271d110f7025db76d3cdf71c005ff1173d816875838ded7477cca043. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES52591287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfc6ce1dab509e8ef936d41e4e4b159cf397f0c8371b46982895c6116edc9b5. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:22:01Z), 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/QZES52591288.