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 0xec49c4fe9ed0b110cebcba4cff6fa7a47ec9aa9ede96a2d3ebf338866840bf35. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84e498f1-af3c-4483-938e-b2ee083045f6.json and https://artists.proofprofile.net/proofs/artist/84e498f1-af3c-4483-938e-b2ee083045f6.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 0x204e6c614af5ee6abcf0daa944813731ba562b40b53cfe557aad0331741d2d76. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/USPUP0812509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdcaf2ea4754db86dde8dd130ab6893228797c97a2b74ef214388b7fb76da365. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/USPUP0812511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326b15e3647b6fda6a75935d6c007a7d2dda00443a6a64714e000592d4fe3e75. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USBMF9421183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3275250261d61a09a45d8360b6780646de5f1aacdf49e93e9718fdb5a1314800. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:43:59Z), 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/USBMF9421184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eb99d862dfe35d13c833079946c7386ae7e6717364da215bf04952b2c4def1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USBMF9421186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8e79f85a1e46164806dec0972b440b219320677314bbd4fa150f5d7bfc8108. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USPUP0812815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e64bc60418ce57f90588ba0d63f6b5ef79411168da32b7eeb1d9f45c724f91. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USPUP0812818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e22f707009c79b5d6134edeed4a703a0fde011b4bc3686b12ceaef0a1bb28a9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USJ3V0911447.