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 0x7156bd51ce57a067ff132be60d7bfe446a97fbedf2448d5885d7078c9311f953. 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/7db5a027-b3ea-48df-b222-8d9f7af2203b.json and https://artists.proofprofile.net/proofs/artist/7db5a027-b3ea-48df-b222-8d9f7af2203b.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 0xa20aa11ee90e513188bb9fd4ac93908ee93a722d06df7e83925686e951295308. 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/QZMEQ2165402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfb694b93a063755ee9baffcdd076dc110bf39b2e4390743696e6f85cca6f9c. 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/QZNWQ2176338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73b0429ba7b4fa7c5a92d1679bd57d62876cb636cfa507400fdf8e22da72923. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:21:30Z), 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/QZMEP2269595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1688d950c8a1aba022fa63e50c3c5dd4ed5958167f9f6ecd1f41fcd55f9a633e. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T12:02:19Z), 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/QZTAZ2298050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf9940cb47ad5ff2ec48bfbbfbe6e59e762592be9053db45c0cb4cdb9b0647b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZTB22220796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f78f7108fccab414c81b5cc87c90c5883c8992bf9790cf9160eef20286a7a3. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QZES82375667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b89425362aff98e2981b95feb0e1bc893b3c715200fd7534accb0cd12ec4f6. 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/QZRP42426434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4fb72af3292270fc0a1aed65c1659a89f2839075c22117a228d2070542f487. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZRP52407817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbda350e727cd1b91a38439c34e749c3df3817a16bf42a40dd086b8c9f973346. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP42423432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d8a7bd1daccb7fd3f95a47b5230acb77c9cb219b11520ddb0f3b68f21b6c2. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZRP42423436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed6fe6a3b149cf55278dc2ac9ae819b6bdc298f8ded322db9a54bce84385196. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZRP42429832.