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 0x3e33f3f9bb5f893a86ce8b040f9b31631b5fb72d6e3488b58cdec46ff0b45ecf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1685adbc-719d-4217-b235-42164f39f07e.json and https://artists.proofprofile.net/proofs/artist/1685adbc-719d-4217-b235-42164f39f07e.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 0xef38b4a98a029bd6888cd4fedd7eef2b2abaa4a95c75a07df0079bc8fcad598a. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52506159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddf0401d21703d63dac2997e3f8a46b9db7eff02cdadaf4b2f51eeadf2474b4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES52506160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbcc9616958384e9baaba434b7c0c8d7fefb156e3dd223155629851856bcdf1. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES52506161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3e33a2a38995257b0f94356610bcd282dbfd5ef75cb0f87a6605f81c2520bb. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52506162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e60c67576e9ecd0a68b6d5ce4034083ba6d14101e77eb75082d14b7998e9d8. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/QZES52506163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4582a9c3db200e53d47a6564a8c8fa2a7dd02c303f6d08d11b432a37952801. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES52506164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09505c6a0e0cb9307a62922a7683982c75710bb452f905ede85d2fedda96214. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52506165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f078c8b7f5c9651dcf83a4c481d8dafd2ca435459ef7e905b5697b3f5a52d34. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52506166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf634dba82c26eebf2b2d80a4e0aa8b36b65025a3355cfa6ac856fd644ab4f0c. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZES52506167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea219ac5550dee3619b3d46ef4048cd9c3ba889e957ead2670148fc56d8b2121. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZES52506168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444c8ae8556ebbcc80ee1a0df1d993aabb8795c243f080ba0b16ca1ff45afaf5. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52506169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802b0957b5eec83be4564b87ab1d6936aba9360e063739279e7099a2cf7b2a39. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZES52506170.