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 0x75457aac2032ba5ccfb2af44980e10fa7ba4a806934bc3b52a9b6c353ff9fd8e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5a34180-b977-46bf-b3d9-92f179087e1f.json and https://artists.proofprofile.net/proofs/artist/d5a34180-b977-46bf-b3d9-92f179087e1f.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 0x924902bdc0b23bc71df695f9ea6762ff431384b4fd8243846782c62a5320a959. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:10:38Z), 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/QZW9N2211984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3204adf3d2a11dbe28d1f37a9fd9355bc74f4676d58f2f3794a26e1ea348d6f5. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:04:01Z), 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/QMBZ92348723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acc66d0a2cec1afe313d524a3e92cac915a2ce36738872982e328d983292893. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QM7282395789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1470191707c46d9bc36360e39dbe3798cb13ce2f85e63f9f5ce2638cca91a9f. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:39:23Z), 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/QMBZ92348726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79bd6c221c1007e42392c7450d15ba7909e019e2b1a80293fd802c5fe093435. 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/QZNJX2473082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1740a8e395e223631be121c231a9e6a8315050b42dcff53b947fe3cb3dca24. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QZW9L2434034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab941e8f8e783767678c1c98abefc707232839e1ce28e8a90556c290b0e97b1b. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJV2565494.