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 0xca0893d9c8720f7a49494dd02bf19ac2a9cf3e76a159d09a61f96fce47939b09. 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/cf290bcc-759c-48d4-83bd-d12fccda15a7.json and https://artists.proofprofile.net/proofs/artist/cf290bcc-759c-48d4-83bd-d12fccda15a7.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 0x16f9798b44d2c82f4a62126998333c07ebc1d1989c41b2db7e183a7836e0cbed. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/QZZ7Q2421324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868a73aca7ad39c1eb2e56dcbe57df46c3101c3e80fe9f02153e9503a0dd1f9e. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:53:27Z), 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/QZFZ22522822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c4cd29370988156cb5ebfd39b6cbcd1bc8f71fb48abd82eab50e6f887cde9b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T04:59:48Z), 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/QZDA72514737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ecbb6890ca9b9c8ef55524c57c8aca2978b517c0d03025a407d7927303504f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:25:48Z), 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/QZHN42539186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d73079b6844bfb4aee377b12a2775e7be8a36078d48a93276955c0867a9e4fb. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNC2510024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1812cf954fcb899692a1add9886ec77153f98d04140f0a4514f0e778f4ea5fde. 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/QT4K32537000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750f6d6f142bd242e20776dbff6987460e300a15d34a3e6f35a1c601142fc58c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QT4K52514731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c2089835c63b4f52bdcdda611014c63bbbb61b24ccab515825e20b59168a4c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT4K52560738.