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 0x766a1ccd57ba476a3747fa0f7bc7dad1ce298aa141173351e866217097cb2da6. Chain 2 (Bitcoin): anchored in block 953743 (2026-06-15T04:52:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a24eca03-a353-4593-9e3a-5dfc5a08b6c9.json and https://artists.proofprofile.net/proofs/artist/a24eca03-a353-4593-9e3a-5dfc5a08b6c9.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 0xb33697b5c3eecd4bf3ede7bb0eea89692238aacedc68a296889939e29d26a085. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:52Z), 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/QZNW72208176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa7c6731d84d748f9b4f4c49745a00c9d17ca991b43039f6b5311ec4805e2d8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNW72208177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ff368801309819cbe53428625f2a6a7d1c65be791869f39ea58bf5226b56b9. 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/QZNW72208178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ec619a7cb482899c8a55474686708c39f8b79c0b2722f3337366defe68b6bd. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNW72208179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3599bfce97e301a3785087d9b23cb2de66caf4ef0e1915a123badd023131eea8. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:01:33Z), 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/QZNW72208181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd288f79105876c0d9be78d6c81a9e9ac045095b7be609964063636ba0ad7164. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZNW72208183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf7c52567eeef8f7e1fb018902b3e2ad19559faeb265ab0e93af709f536e4559. 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/QZNW72208184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50020fb011910ca7d7ab88d337096effde2c43f5ec791f49a9bff13473f7e4e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:30:17Z), 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/QZNW72208185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x865b71da6dfefb8e564814dc19156bf4d8d3f39b7b6220305a3b338f8db923c4. 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/QZNW72208186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf979ea25aa927b1a4c13cb158e78abc19539e4f2c44bc868c48308b5dcbf7bed. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZNW72208187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49715f7703d9bad5cbf76337e94291cd0524bcf08800fcc125364b8d0361c528. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNW72208188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74c48470c28794a5b7143275693f506019fceb302efec03c81966d7d2ebfecb. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZNW72208190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95b6c83b176b30dfe86616ed2c6893c4df87cb6fff25cf71413105bd144e8fb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNW72208194.