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 0x87860a71f7b17bc59b02b6848cbe203120e7e6448de4ad470ff824da5fa3ab81. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/743016e8-bb3c-4d25-9ab9-3aa461302738.json and https://artists.proofprofile.net/proofs/artist/743016e8-bb3c-4d25-9ab9-3aa461302738.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 0x4c9d564d8ecda3ba4dfabead7fc08a8d5cc72ef53f3746834ad7c3f88d5de09a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:19Z), 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/QZFZ72119817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77faf7be4ec2c43bf0304cfcc92ac4178bb8b4c5012f4c99b9bc6711791e083b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:49:05Z), 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/QZFZ72119826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bae6f5d18d5839cbd9d98966fc52925c537503fcf488311e297b97042230c8b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN62176591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba01afa704f2b35938c8abb1e2095ca4f6364a61216d0d4177f466dd28520d6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES52221981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f098a6e49f1c6aa2939cc41c4abc9408c5da94c97d1c717e2b5408134d27d2a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZES52224829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d9085d4a8c46f8ef038c8177d6f8e3e7ea1cf074980fc820f6edece203c88. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES62236237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54530e5b15ba3749d042e257dc639c334f09245d72c1f6be0e567b3557e15a29. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6Q2223138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb10c295cff923acd61f017bd4c201d608c4204e14d238449dc199f60d01a7ae. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:47:17Z), 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/QZNWS2211495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4920d8a585a74362e1cd561d2818abf7090fcfed827a96c53ac0a15a8d794ffd. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZNWS2381361.