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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0db81ed7abab021984b1b4520e74dafba8f176612d598e5a8bd20f3bc82ff8. 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/5c482204-db21-4370-83a7-4e89200654ea.json and https://artists.proofprofile.net/proofs/artist/5c482204-db21-4370-83a7-4e89200654ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
China Town (feat. Unlimited Soul, Vellem Rsa)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f156b27a441eedcee2304371735f4cb55a287db6561561e463880f2ac5791a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZA56E2306223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd419500926bc986b785f370ddf613d8d4a0af69f54758c07450ddc7995984c4b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM7282109666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d49927d0b43b161d3ffce36398eaac902b882c077a7fa8723f0b481e583e33. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM6N22447960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8439c126e3ba07233bf9243fff8b27fc2014ab04e8daf559467e3a45fd142a10. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAUM72400803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72b419d188abf2171eb85709cecc8d6a65ae77f4786cc6beff5f2f48e6929762. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAUM72400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13015450a427543e06a1bce9b4a47fc445fbb8a8d7d184075c8c0b4f35abdb64. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAUM72400805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f681e78b1201d6a4d30dcd6e1db9bfab11b7cf60f0c41841d1e021c1ea72e6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ZAUM72400806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781f50663e140b6448d9591a86b2cc76c5b2dcb8312812f519a335c5b46cdd7f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ZAUM72400808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e24e706065c52ad0bba42033f7c8947ecbf13e1ebd709a939090f0a4d8bf592. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAUM72400815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31752cecad007faed31b96d225d0647d5327b21b3190696cd20497462bd164c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ZAUM72400823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b09638594f7b9929a37e01fc0faa7d4227ee348792df70a1c2b1c73cfff9981. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAUM72400824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bfb0e1f2b3b20a388b0721a6648a7445ca1e887f4816de7e400647271eb1f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAUM72400825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b76c5388d6091d9f3e53d9d6ab966eb2e3e44437d6e6590505419a0def7548. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAUM72400826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fdf3bd31828ee528b809cbb78ffe7e795895169183141a94f3046503fa8b45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZAUM72400827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb403567065f63a787523c04aa2c8c7633c4d7f5aba39f2e7ff20f160a4135067. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ZAUM72400828.